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Table of Contents

Series 2268 850 Watt DC Power Supplies Reference Manual

2268S-901-01 Rev. A / January 2015

Status Commands ...................................................................................................................... 237

Protection Commands ................................................................................................................ 242

Auto Sequence Commands ....................................................................................................... 242

ERROR MESSAGES.............................................................................................................. 243

RROR

ESSAGES

............................................................................................................ 243

Command Error List ................................................................................................................... 244

Execution Error List .................................................................................................................... 245

Device-Specific Error List ........................................................................................................... 246

Query Error List .......................................................................................................................... 246

SPECIFICATIONS .................................................................................................................. 247

PECIFICATIONS

................................................................................................................ 247

Output Performance Specifications............................................................................................ 247

Environmental Specifications (Indoor use) ................................................................................ 248

Mechanical Specifications .......................................................................................................... 248

Regulatory Approvals ................................................................................................................. 248

ECHANICAL

IMENSIONS

................................................................................................. 249

Summary of Contents for Keithley 2268 Series

Page 1: ...www keithley com Series 2268 850 Watt Programmable DC Power Supplies Reference Manual 2268S 901 01 Rev A January 2015 P2268S90101A 2268S 901 01 A Tektronix Company A Greater Measure of Confidence...

Page 2: ...formation herein in whole or in part without the prior written approval of Keithley Instruments is strictly prohibited All Keithley Instruments product names are trademarks or registered trademarks of...

Page 3: ...instruments may be connected to mains These instruments will be marked as category II or higher Unless explicitly allowed in the specifications operating manual and instrument labels do not connect a...

Page 4: ...p must be properly disposed of according to federal state and local laws The WARNING heading in the user documentation explains dangers that might result in personal injury or death Always read the as...

Page 5: ...g 18 STEP 2 LOCATION AND MOUNTING 19 Rack Mounting 19 Ventilation 19 STEP 3 CONNECTING AC INPUT POWER 20 AC Input Connector 20 STEP 4 SELECTING LOAD WIRES 21 Load Wiring 21 Insulation Rating 21 Curren...

Page 6: ...T 41 ENABLING THE AUXILIARY OUTPUT 42 OUTPUT AUTO START MODE AUTO RESTART 42 AUXILIARY AUTO START MODE 43 CONSTANT POWER MODE 43 ALARMS AND ERRORS 44 CLEARING ALARMS 45 Clearing Triggered and Manual A...

Page 7: ...ad Considerations 64 Connecting to the Load in Local Sensing Mode 65 Connecting to the Load in Remote Sensing Mode 66 CONFIGURING MULTIPLE SUPPLIES FOR CURRENT SHARING OPERATION APG METHOD 67 Setting...

Page 8: ...NTROL SOURCE STATE 99 REMOTE OPERATION 101 INTRODUCTION 101 HARDWARE AND CONNECTION SETUP 101 CONFIGURING REMOTE CONTROL USING RS 232 102 RS 232 Communication Cable with RJ 45 to DB 9 103 RS 232 Commu...

Page 9: ...egister Commands 139 Shutdown Sub Register Commands 140 Protection Sub Register Commands 141 QUESTIONABLE STATUS REGISTER 142 VOLTage Sub Register 144 TEMPerature Sub Register 144 Questionable Status...

Page 10: ...wer Supply Hidden Behind a Router 170 Socket Port Number 172 Instrument Drivers and Application Software 173 LXI DISCOVERY BROWSER SOFTWARE 173 SETTING LAN PARAMETERS 173 Setting LAN Parameters via Se...

Page 11: ...rogramming of Voltage Calibration 209 Isolated Voltage Programming of Current Calibration 210 Isolated Resistive Programming of Current Calibration 211 APG CALIBRATION 212 Calibrating the Input Voltag...

Page 12: ...quence Commands 242 ERROR MESSAGES 243 ERROR MESSAGES 243 Command Error List 244 Execution Error List 245 Device Specific Error List 246 Query Error List 246 SPECIFICATIONS 247 SPECIFICATIONS 247 Outp...

Page 13: ...urrent analog outputs are also available for remote monitoring and analog control EXTENDED WARRANTY Additional years of warranty coverage are available on many products These valuable contracts protec...

Page 14: ...pply to switch between Constant Current Constant Voltage and Constant Power operating modes Parallel or series connection among multiple units to produce greater diversity or to use in higher power ap...

Page 15: ...ck mount kits are available for the Series 2268 instruments The table below shows the available models Complete details and installation instructions are included in the document that ships with each...

Page 16: ...ption 1 Rotary Adjust Enter control 2 Constant Voltage CV Mode LED green 3 Constant Current CC Mode LED green 4 Output Current Display 5 Model Identification Label 6 Output Voltage Display 7 Alarm Ind...

Page 17: ...DC Power Supplies Reference Manual Introduction 2268S 901 01 Rev A January 2015 15 REAR PANEL FAMILIARIZATION Figure 3 Series 2268 850 Watt 20 V to 40 V Rear Panel Figure 4 Series 2268 850 Watt 60 V...

Page 18: ...Negative 6 5 mm hole diameter 60 V 150 V Models DC Output Connectors Negative 3 J2 Ethernet ENET or GPIB Connector 4 J4 RS 232 RS 485 Connector In Port 5 AC Input Connector IEC Type 6 Chassis Ground S...

Page 19: ...ll Install the power supply benchtop or rack mount Ensure adequate ventilation Step 2 Location and Mounting on page 19 3 Connect Input Power Connect AC input power Step 3 Connecting AC Input Power on...

Page 20: ...lays 2 Ensure that the packing box contains a power cord 3 If you see external damage or suspect internal damage contact the carrier immediately Periodic Cleaning The power supply only requires period...

Page 21: ...Keithley Instruments office sales partner or distributor or call Keithley Instruments corporate headquarters toll free inside the U S and Canada only at 1 800 935 5595 or from outside the U S at 1 44...

Page 22: ...re not connected to an electrical ground via the safety ground in the AC input connector Ensure that the power supply is connected to a grounded AC outlet with the recommended AC input cord configured...

Page 23: ...oad wiring must have a current carrying capacity greater than the output rating of the power supply to ensure that the load wiring will not be damaged if the load is shorted The table that follows sho...

Page 24: ...e Length for 1 V Line Drop WIRE LENGTH FEET WIRE GAUGE AWG LOAD CURRENT AMPS Noise and Impedance Effects To minimize noise pickup or radiation use shielded twisted pair wiring of the shortest possible...

Page 25: ...On Off To power on the power supply 1 Ensure that the front panel power switch is in the Off position 2 Ensure that the AC line voltage is within operating range 3 Connect the line cord to a grounded...

Page 26: ...4 Adjust the voltage to 5 V 5 To check current mode operation turn the 9 position mode control to AMPS position Verify that the current set point is blinking in the output current display 6 Adjust the...

Page 27: ...als of opposite polarity do not touch Load cables and sense wires should be provided with strain relief DC Output Connectors WARNING Shock hazard Disconnect the AC input before making any connections...

Page 28: ...Selecting Diodes The diode must have a voltage rating at least 20 greater than the power supply s output voltage and have a current rating greater than or equal to the power supply s output rating Co...

Page 29: ...use the remote sensing feature See Step 7 Connecting Remote Sensing on page 28for more information Figure 7 Connecting Single Loads Connecting Multiple Loads The proper connection of distributed load...

Page 30: ...r supply from the output terminals to the load or other distribution terminals Use shielded twisted pair wiring of 20 to 26 AWG for best noise performance Make sure that the shielded twisted pair wiri...

Page 31: ...ith the sense lines disconnected the power supply regulates the voltage at the output terminals CAUTION Equipment damage Do not operate the power supply with sense lines connected to the load without...

Page 32: ...23 CONFIGURING SETTINGS FROM THE FRONT PANEL The 9 position mode control is used with the rotary Adjust Enter control to configure settings in local operation See Figure 2 for location of the front p...

Page 33: ...alue selected and cycle to the next setting AMPS Current Programming Select the current set point in coarse or fine adjustment modes See Constant Current CC Mode Operation on page 38 Set the value sel...

Page 34: ...he feature or setting 4 Set each value using the rotary Adjust Enter control When the value has been selected press the rotary Adjust Enter control to commit the updated value Additional values may be...

Page 35: ...and return to normal display mode To access the select and set entry mode for the voltage and current set points 1 Select VOLTS or AMPS position on the 9 position mode control 2 Press the rotary Adjus...

Page 36: ...Local Operation Series 2268 850 Watt DC Power Supplies Reference Manual 34 2268S 901 01 Rev A January 2015 Figure 10 Front Panel Menu System...

Page 37: ...RS 232 RS 485 RS 485L All segments On Power Up Positive Polarity Alternating Current RS 485 Address Analog Programming Power On Autostart Auxiliary Autostart Current Analog Programming Clear Constant...

Page 38: ...Preset Remote Programming Interface Non Isolated Resistive Analog Programming Controller current share controller Share current share Multichannel Remote Interface Soft reset Save Preset Shutdown Sla...

Page 39: ...voltage set point VSET Output current set point ISET Impedance of the attached load RL The three output modes of operation are Constant Voltage CV mode see page 37 Constant Current CC mode see page 38...

Page 40: ...in order to maintain the voltage set point The current set point has been reached in which case the unit will regulate the current in order to maintain the current set point Figure 11 Voltage Current...

Page 41: ...e output current display 2 Set the desired voltage value using the rotary Adjust Enter control Important If you can t get the set point to the desired level you may need to change the set points for O...

Page 42: ...ed in the output current display 2 Set the desired current value using the rotary Adjust Enter control 3 Press the rotary Adjust Enter control to transition to Fine Adjust mode The set point blinks fa...

Page 43: ...ge See Using Over Voltage Protection OVP on page 50 for the adjustment procedure ENABLING THE OUTPUT Enabling the output on will also turn off the ALARM LED if the ALARM LED has been latched on due to...

Page 44: ...ill be present with respect to Pin J3 2 or Pin J3 6 COM ISOLATED See also AUX Output and Isolated Analog Programming ISOL Connector on page 87 for more details The SCPI command s for these instruction...

Page 45: ...d voltage and current limits may be set while in the constant power mode If the unit cannot regulate to the Constant Power setting due to load conditions it will regulate at either the voltage or the...

Page 46: ...ble that more than one alarm will trigger at the same time When this occurs the alarm with the highest precedence will blink on the display The table that follows lists the precedence of alarms If the...

Page 47: ...you have cleared all alarms Clearing a Flash Failure Alarm The Flash Failure alarm is the only exception for clearing alarms If a flash failure occurs at boot time it can only be cleared by a soft res...

Page 48: ...ed For example if one of the fans was temporarily blocked causing a Fan alarm then the blockage was cleared and the fans restarted the alarm would clear The output voltage and current displays would b...

Page 49: ...ng enabled Clearing the bit position 0 of an alarm will result in the alarm being masked disabled For Example If you wanted to enable the OTP Foldback and UVP alarms you would take the foldback value...

Page 50: ...larms you want to latch Read the value for this bit position from the table that follows and sum them together The result is the alarm last mask which you should send with the SCPI command For Example...

Page 51: ...ED will illuminate and will be displayed in the output voltage display 4 Adjust the desired delay time using the rotary Adjust Enter control The range can be set from 0 50 seconds to a maximum of 50 s...

Page 52: ...ased on the VAP input signal level The user should note it is possible to trip OVP in this mode if the OVP is configured when the analog programming source is off When the user attempts to configure a...

Page 53: ...hese cases it is recommended that the user mask the UVP alarm until the rise time has elapsed and then unmask the alarm to allow UVP protection to be enabled during operation Defining the UVP Set Poin...

Page 54: ...on the display The OTP alarm is an alarm that will auto recover when the temperature falls back into normal bounds Defining the OTP Mode To define the OTP lock 1 Turn the 9 position mode control to th...

Page 55: ...of sinking 10mA minimum This input is also compatible with the use of dry contacts where a short is logic low and an open is logic high The input lines of the shutdown circuit are fully optically iso...

Page 56: ...rotection feature can be used to enable or disable multiple units in daisy chain configuration through the AUX Output and Isolated Analog Programming Connector J3 Up to four units example Units 1 thro...

Page 57: ...tion mode control to the PRT position PRO OVP is displayed 2 Turn the rotary Adjust Enter control until LOOP PRO is displayed 3 Press the rotary Adjust control to display LOOP ON or OFF 4 Press the ro...

Page 58: ...e Interlock Mode The Interlock mode is controlled via SCPI commands There is no front panel access for enabling or disabling the Interlock functionality See Interlock Enable Disable on page 161 The SC...

Page 59: ...SCPI command to query or enable disable the 0 Current Output Preset upon output enable is SYSTem channel PON ENAble CURRent ON OFF POWER ON STATUS SIGNAL Power On Status signal indicates a fault cond...

Page 60: ...tings will be loaded when the power is restored to the unit or the power supply is powered up again The table that follows lists the settings that are saved and recalled on a power cycle event Voltage...

Page 61: ...in Autostart OUTPUT ENABLE Aux Foldback Mode Foldback Delay Shutdown Logic Voltage Analog Programming VAP Mode Voltage Analog Programming VAP Level Current Analog Programming CAP Mode Current Analog P...

Page 62: ...urrent display 2 Turn the rotary Adjust Enter control to select a preset position from 1 to 3 3 Press the rotary Adjust Enter control is displayed on the output voltage display The settings in the sel...

Page 63: ...selected remote interface in the output current display 2 Turn the rotary Adjust Enter control until the display shows 3 Press the rotary Adjust Enter control 4 Turn the rotary Adjust Enter control un...

Page 64: ...l alarm triggers it is also possible to reset the power supply The front panel should display 3 Once a reset has been triggered the output voltage display shows for 1 second The model number will be d...

Page 65: ...insulation rating of the load wiring and circuitry is greater than or equal to the maximum or combined output voltage of the power supply CAUTION Equipment damage Do not connect power supplies from di...

Page 66: ...voltage to prevent damage to the lower voltage supply at short circuit condition Load Considerations CAUTION Equipment damage Use properly rated diodes to protect the power supply from damage while d...

Page 67: ...ard Current rating should be a minimum of 1 5 times the power supply maximum output current Heatsink may be required There also may be a need for higher voltage rated parts dependent on load circuit d...

Page 68: ...e positive supply s positive sense line should connect to the positive terminal of the load or distribution point Its return sense line should connect to the connection between the two units at the sa...

Page 69: ...input to each slave unit The readback using any of the monitoring methods front panel display user monitor lines or SCPI measure commands of each unit master or slave will provide individual unit sta...

Page 70: ...t Enter control is displayed on the output voltage display 2 Turn the Adjust Enter control to select and press the Adjust Enter control is displayed on the output voltage display 3 Turn the rotary Adj...

Page 71: ...uts down it will program the slave unit s output to zero volts CONNECTING TO THE LOAD IN LOCAL SENSING MODE PARALLEL CONTROL METHOD Connect the power supplies in parallel to obtain a single output sup...

Page 72: ...supply will revert to a low power consumption mode with the following characteristics Display will be blank The internal cooling fans will run at the lowest possible speed for whisper quiet operation...

Page 73: ...enabled set to a value from 1 to 9 it will be enabled If the set time elapses without any activity on the power supply it will enter Sleep Mode Note that after issuing a RST command the power supply...

Page 74: ...nge 2 10 volts k max the power supply s output varies proportionally over its output range For example if you set the programming scale to 10 V voltage source and apply 5 V to the programming pins the...

Page 75: ...e respective voltage and current control If local front panel control is used or non isolated APG is used these values will be inaccurate and should not be used for monitoring Conversely if isolated A...

Page 76: ...Negative Local Sense J1 6 SNS Negative Sense J1 7 COM Analog Common Same as power supply negative sense SNS J1 8 COM Analog Common Same as power supply negative sense SNS J1 9 VOL_PR Analog Voltage P...

Page 77: ...programming is used the isolated monitor lines should be used as the non isolated monitoring lines will not accurately reflect the output state of the power supply Making Control Connections CAUTION...

Page 78: ...re For lowest noise performance use shielded twisted pair wiring of 20 to 26 AWG of the shortest length possible Ground the shield to pin J1 7 analog common on the Analog Programming Connector or to t...

Page 79: ...ge source from non isolated connector 3 Press the rotary Adjust Enter control to commit the selected mode is displayed on the output voltage display 4 Once the desired level has been selected press th...

Page 80: ...ing to when the operation is complete Otherwise do not rotate the rotary Adjust Enter control to keep the current APG mode 3 Press the rotary Adjust Enter control to select the APG mode The output vol...

Page 81: ...ector 3 Press the rotary Adjust Enter control to commit the selected mode is displayed on the output voltage display 4 Select the input source level using the rotary Adjust Enter control 5 Once the de...

Page 82: ...ing to when the operation is complete Otherwise do not rotate the rotary Adjust Enter control to keep the current APG mode 3 Press the rotary Adjust Enter control to select the APG mode The output vol...

Page 83: ...g Programming Isolated Analog Programming 2268S 901 01 Rev A January 2015 81 ANALOG PROGRAMMING WITH EXTERNAL RESISTOR Figure 24 Programming Output Voltage using an External Resistor Figure 25 Program...

Page 84: ...3 Press the rotary Adjust Enter control to commit the selected mode is displayed on the output voltage display 4 Select the input source level using the rotary Adjust Enter control 5 Once the desired...

Page 85: ...ing to when the operation is complete Otherwise do not rotate the rotary Adjust Enter control to keep the current APG mode 3 Press the rotary Adjust Enter control to select the APG mode The output vol...

Page 86: ...source from non isolated connector 3 Press the rotary Adjust Enter control to commit the selected mode is displayed on the output voltage display 4 Once the desired level has been selected press the r...

Page 87: ...ing to when the operation is complete Otherwise do not rotate the rotary Adjust Enter control to keep the current APG mode 3 Press the rotary Adjust Enter control to select the APG mode The output vol...

Page 88: ...g Programming Series 2268 850 Watt DC Power Supplies Reference Manual 86 2268S 901 01 Rev A January 2015 VOLTAGE AND CURRENT READBACK Figure 26 Voltage Readback using APG Connector J1 Figure 27 Curren...

Page 89: ...ee Figure 28 All pins on this connector are electrically isolated from the output of the power supply The AUX Output and ISOL Connector provide access to the following functions Function 850 W Auxilia...

Page 90: ...he value of the Voltage Analog Programming Level J3 11 AUX 22 15 V Isolated Output J3 12 SD Shutdown Input to power supply to disable output This input has user selectable negative logic operation via...

Page 91: ...front panel displays have gone out For most connectors and jumpers use any suitable wire such as 22 AWG stranded wire For lowest noise performance use shielded twisted pair wiring of 22 AWG Use the sh...

Page 92: ...connector 3 Press the rotary Adjust Enter control to commit the selected mode is displayed on the output voltage display 4 Select the input source level using the rotary Adjust Enter control 5 Once t...

Page 93: ...when the operation is complete Otherwise do not rotate the rotary Adjust Enter control to keep the current ISOL mode 3 Press the rotary Adjust Enter control to select the ISOL mode The output voltage...

Page 94: ...t Enter control to commit the selected mode is displayed on the output voltage display 4 Select the input source level using the rotary adjust Enter control 5 Once the desired level has been selected...

Page 95: ...when the operation is complete Otherwise do not rotate the rotary Adjust Enter control to keep the current ISOL mode 3 Press the rotary adjust Enter control to select the ISOL mode The output voltage...

Page 96: ...upplies Reference Manual 94 2268S 901 01 Rev A January 2015 ANALOG PROGRAMMING WITH EXTERNAL RESISTOR Figure 31 Programming Output Voltage using an Isolated External Resistor ISOL Connector Figure 32...

Page 97: ...d connector 3 Press the rotary adjust Enter control to commit the selected mode is displayed on the output voltage display 4 Select the input source level using the rotary adjust Enter control 5 Once...

Page 98: ...when the operation is complete Otherwise do not rotate the rotary Adjust Enter control to keep the current ISOL mode 3 Press the rotary adjust Enter control to select the ISOL mode The output voltage...

Page 99: ...djust Enter control to commit the selected mode is displayed on the output voltage display 4 Select the input source level using the rotary Adjust Enter control 5 Once the desired level has been selec...

Page 100: ...when the operation is complete Otherwise do not rotate the rotary Adjust Enter control to keep the current ISOL mode 3 Press the rotary Adjust Enter control to select the ISOL mode The output voltage...

Page 101: ...CURRENT READBACK ISOLATED Figure 33 Isolated Voltage Monitoring ISOL Connector Figure 34 Isolated Current Monitoring ISOL Connector QUERY REMOTE CONTROL SOURCE STATE Quick Tip Remote operation uses t...

Page 102: ......

Page 103: ...ence This section is divided into two parts Hardware and Connection Setup provides information on how to setup a connection to the different remote interfaces available on the power supply The remote...

Page 104: ...ifications listed in the table that follows Figure 35 Remote Control Connectors J4 RS 232 and RS 485 connector in port J6 RS 232 and RS 485 connector out port Pin Reference Direction Function J4 1 RX...

Page 105: ...he PC side and RJ 45 shielded connector on the power supply The suggested cable length should be 9 84 feet 3 m DB 9 Pinouts Pin Name Description 1 NC No connection 2 RX Receive data Twisted pair 3 TX...

Page 106: ...DB 25 Communication control cable with DB 25 pinout male on the PC side and RJ 45 shielded connector on the power supply The cable length should be 9 84 feet 3 m or longer Figure 37 DB 25 Pinout DB 25...

Page 107: ...n Cable with DB 25 Pinout Completing the Setup To complete the setup Configure the power supply to use the 232 remote interface and set up the terminal that will be used on the connected PC See the se...

Page 108: ...ication cable with DB 9 Refer to the user manual of your communication card before wiring the cable DB 9 Pinouts Pin Name Description 1 GND Ground 2 3 NC No connection 4 RXD Receive data Twisted pair...

Page 109: ...unit are the same as described in the table that follows Pin Name Description 1 2 NC No connection 3 RXD Receive data Twisted pair 4 RXD Receive data 5 TXD Transmit data Twisted pair 6 TXD Transmit d...

Page 110: ...SB connection you ll need to download the latest driver from www Keithley com To download and install a virtual COM port VCP driver 1 Go to www keithley com support and enter your model number in the...

Page 111: ...850 Watt DC Power Supplies Reference Manual Remote Operation 2268S 901 01 Rev A January 2015 109 6 Launch the Device Driver Installation by clicking Next See Figure 42 Figure 42 Device Driver Installa...

Page 112: ...agreement click Save As and or Print button s to maintain a copy of the agreement if desired and click Next to begin the installation See Figure 43 Figure 43 License Agreement 8 Click the radio button...

Page 113: ...es the first part of the installation during which the USB to serial converter is installed The second part involves the installation of a serial port which should follow automatically once the conver...

Page 114: ...tab and click on Device Manager The Device Manager window displays See Figure 45 Figure 45 Device Manager 2 On the View menu select Devices by Type 3 To change the virtual COM port properties select...

Page 115: ...mote Operation 2268S 901 01 Rev A January 2015 113 4 Click the Port Settings tab then click Advanced See Figure 46 Figure 46 Communications Port COM5 Properties 5 In the COM port list scroll to the re...

Page 116: ...Interface Bus GPIB interface The GPIB interface is an 8 bit parallel data bus having a host of bus commands for synchronization and up to one megabyte data transfer rate Use standard IEEE 486 26 AWG...

Page 117: ...to PGM is displayed in the output voltage display 2 Turn the rotary Adjust Enter control to select the GPIB communication port 3 Press the rotary Adjust Enter control is displayed on the output volta...

Page 118: ...C Power Supplies Reference Manual 116 2268S 901 01 Rev A January 2015 Figure 48 Scanning for Instruments 7 In the Connected Instruments panel of the GPIB explorer window click on Instrument 0 and revi...

Page 119: ...tant If you press Enter while typing the string to be sent the NI 488 2 Communicator program will exit 10 The String Received window in the lower half of the NI 488 2 Communicator window will show the...

Page 120: ...supplies See Figure 48 Figure 50 Multi Power Supply Connection to RS 485 Bus Multiple Power Supply Setup Master Setup Configure the master unit by selecting the communication interface you wish to use...

Page 121: ...er supply ignores the Line Feed ASCII 10 0x0A character HyperTerminal The HyperTerminal program is a standard windows program and can be found in Start All Programs Accessories Communications Hyper Te...

Page 122: ...6 Setup the data format to be used See Data Format on page 119 for details 7 Set up the Hyper terminal you will need to configure the properties 8 Click File Properties to bring up the connection pro...

Page 123: ...llowing boxes Send line ends with line feeds Echo typed characters locally Append line feeds to incoming line ends Wrap lines that exceed terminal width 12 Change the Line delay to 30 milliseconds 13...

Page 124: ...gured when the local lock setting was activated will still be available for remote control while the front panel is locked Data Rate Setting Kbps The data rate setting is available for RS 232 and RS 4...

Page 125: ...rotary Adjust Enter control is displayed on the output voltage display 3 Turn the rotary Adjust Enter control to select the desired multichannel address from 1 to 30 4 Press the rotary Adjust Enter co...

Page 126: ...er only one device can respond to a message Responses will be sent according to the conditions defined below Rules for Multichannel Responses Condition Response Example No multichannel address used On...

Page 127: ...e standard status reporting required by SCPI and then covers the specific reporting that is implemented within the SCPI status reporting framework Figure 53 is taken from the SCPI 99 standard and show...

Page 128: ...Remote Operation Series 2268 850 Watt DC Power Supplies Reference Manual 126 2268S 901 01 Rev A January 2015 Figure 53 SCPI Status Reporting Model...

Page 129: ...wn in the bottom rectangle of Figure 53 follow the IEEE 488 2 model for status registers The IEEE 488 2 register only has enable registers for masking the summary bits Figure 54 shows the details on t...

Page 130: ...t queue 3 8 Questionable Status Register QSR Set if any bits are set in the Questionable Status Event register 4 16 Message Available MAV Indicates whether the output queue is empty MAV is TRUE if the...

Page 131: ...ster Summary Status MSS This is caused by one of the following Status Byte bit 0 AND Service Request Enable Register bit 0 Status Byte bit 1 AND Service Request Enable Register bit 1 Status Byte bit 2...

Page 132: ...example Sending SRE 8 sets bit 3 of the Service Request Enable Register This will cause the Summary bit of the Questionable Status register bit 3 in the Status Byte to generate a service request mess...

Page 133: ...must make the logical sum of all values for the events that you to be reported and send this parameter in decimal format See the table that follows for values for the events to be enabled in status e...

Page 134: ...n Error EXE Set if a program data element following a header was evaluated by the power supply as outside of its legal input range or is otherwise inconsistent with the power supply s capabilities Sug...

Page 135: ...rate the operation complete message in the Standard Event Status Register when all pending operations have been finished See bit 0 in the Standard Events Register table above for more details Command...

Page 136: ...ill have the following structure which control how they report status information In all subsequent figures that have SCPI registers this structure will be condensed down into a single block to simpli...

Page 137: ...ly s normal operation The Operation Status data structure has the operation status register and two sub registers to represent shutdown and protection shutdown Each of the sub registers is summarized...

Page 138: ...he CSHare Sub Register 12 4096 Constant Voltage Mode Reflects the output mode of the supply 13 8192 Constant Current Mode Reflects the output mode of the supply 14 16384 Program Running Indicates if a...

Page 139: ...ction has tripped 8 256 Fan Fan failure protection has tripped Current Share Sub Register This register shows the state of the current share configuration which can either be set through the front pan...

Page 140: ...ister Condition SCPI command STATus channel OPERation CONDition Enable Operation Status Register SCPI command STATus channel OPERation ENABle status enable Query Format STATus channel OPERation ENABle...

Page 141: ...ition Enable Current Share Sub Register SCPI command STATus channel OPERation CSHare ENABle statusenable Query format STATus channel OPERation CSHare ENABle Set Current Share Positive Transition Filte...

Page 142: ...Enable Shutdown Sub Register SCPI command STATus channel OPERation SHUTdown ENABle status enable Query format STATus channel OPERation SHUTdown ENABle Set Shutdown Positive Transition Filter SCPI com...

Page 143: ...Register SCPI command STATus channel OPERation SHUTdown PROTection ENABle status enable Query format STATus channel OPERation SHUTdown PROTection ENABle Set Protection Positive Transition Filter SCPI...

Page 144: ...rs may indicate that the output of the supply is of undesirable or questionable quality The Questionable Status data structure consists of a questionable status register and two sub registers represen...

Page 145: ...t Not Implemented 2 4 TIME Not Implemented 3 8 POWer Not Implemented 4 16 TEMPerature Summary of Temperature Register 5 32 FREQuency Not Implemented 6 64 PHASe Not Implemented 7 128 MODulation Not Imp...

Page 146: ...r the maximum operating temperature QUEStionable TEMPerature Status Register Bit Bit Weight Bit Name Description 0 1 OTP Over Temperature Protection Reading Internal Temperature Measurements Internal...

Page 147: ...UEStionable CONDition Enable Questionable Status Register SCPI command STATus channel QUEStionable ENABle status enable Query Format STATus channel QUEStionable ENABle Set Questionable Status Positive...

Page 148: ...ition Enable Voltage Status Register SCPI command STATus channel QUEStionable VOLTage ENABle status enable Query Format STATus channel QUEStionable VOLTage ENABle Set Voltage Status Positive Transitio...

Page 149: ...Status Register SCPI command STATus channel QUEStionable VOLTage TEMPerature ENABle status enable Query Format STATus channel QUEStionable VOLTage TEMPerature ENABle Set Temperature Status Positive T...

Page 150: ...ed string containing an Error event_description followed by optional Device dependent info text Each Error event_number has a unique and fixed Error event_description associated with it The maximum st...

Page 151: ...error code only the response will be the numeric error code only no additional description will be given The error queried will be removed from the queue Command SYSTem ERRor CODE EVENt Example SYST...

Page 152: ...device specific functions to a known state that is independent of the past use history of the device 2 Force the device into the OCIS state see IEEE 488 2 standard section 12 5 2 3 Force the device in...

Page 153: ...ers and queues in the device status reporting mechanism For the device dependent status data structures the PRESet command sets the enable register to all 1s and the transition filter register to repo...

Page 154: ...characters long The full path for every command and query shall be returned separated by line feeds A SCPI header is defined as It shall contain all the nodes from the root The SCPI program mnemonic...

Page 155: ...A nquery CALibration OUTPut ANALog VOLTage DATA nquery CALibration OUTPut ANALog VOLTage ISOLated DATA nquery Querying Help for Legacy Command Headers The SYSTem channel HELP LEgacy query is essential...

Page 156: ...ked remote digital programming mode only SYST REM STAT LOC Front panel is unlocked SYST REM STAT Query for status AUTO SEQUENCE PROGRAMMING Auto Sequence programming lets you execute a program stored...

Page 157: ...ted Storing an Auto Sequence Program Loading a program into memory is done by using the PROGram channel RECord STARt command After the start command has been issued the power supply will record all su...

Page 158: ...l program 6 Using any text editor open the file that you captured the Auto Sequence program to 7 Remove the first line which should read PROG channel READ and the first blank line This makes the first...

Page 159: ...Response CLS VOLT 5 4 CURR 0 25 IDN PROG STOP Reloading an Auto Sequence Program The following procedure will demonstrate how to store a command beyond a power cycle of the unit Important This functi...

Page 160: ...etion and then repeat the number of times specified by the repeat command The default at power on is to have repeat set to 1 Commands TRG INITiate channel IMMediate PROGram channel STATe RUN STOP PAUS...

Page 161: ...nnel REPeat command If a program is running or pause the PROGram channel REPeat command will not work Commands PROGram channel REPeat count INFinity Where count is the repeated count from 1 to 65 534...

Page 162: ...ent with the CV mnemonic and the output is enabled with no load attached open circuit the unit will operate in constant voltage mode and the foldback counter will begin counting If the CC mode was set...

Page 163: ...r front panel operation or SCPI command as shown below The default value of Loop Protection is set to Disabled Important While Loop Protection is enabled set to ON the external shutdown function will...

Page 164: ...APRogram LEVel VOLTage ISOLated level SYSTem channel COMMunicate APRogram LEVel VOLTage level SYSTem channel COMMunicate APRogram LEVel CURRent ISOLated level SYSTem channel COMMunicate APRogram LEVel...

Page 165: ...ion mask is a feature that is only accessible using the SCPI command noted below Command SYSTem channel PROTection MASK mask Where mask is the bit mask for disabling the alarms See below for details A...

Page 166: ...rough a LAN Ethernet connection The information presented here will guide you in making the connections necessary to control your power supply remotely SETTING UP LAN ETHERNET This section is intended...

Page 167: ...Ground 6 RX Receive data 7 Gnd Ground 8 Gnd Ground Figure 60 Scheme of crossover Ethernet cable 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 TX TX RX RX ENET Connector The ENET connector is located on the rear pan...

Page 168: ...require any additional proprietary software or cards Media Access Control MAC Address The Ethernet LAN interface of the power source has a unique network address known as the MAC address a unique hexa...

Page 169: ...than through a network Next establish an IP address for the instrument You can assign a static IP address by using the same address as the PC that the instrument is connected to To find the PC s IP ad...

Page 170: ...s IP Configuration Ethernet adapter Local Area Connection Connection specific DNS Suffix IP Address 169 254 0 208 Subnet Mask 255 255 0 0 Default Gateway To determine what IP address to use use the fi...

Page 171: ...e 63 PC on Same Side of Router as Power Supply The simplest case is when they are both on the same side as in Figure 63 In this example the router has assigned addresses to the power supply 192 168 1...

Page 172: ...tead it only sees the router at its address of 10 11 27 86 this address is given as an example only Figure 64 Power Supply Hidden Behind a Router In order to send messages from the PC to the power sup...

Page 173: ...wser to the address of 192 168 1 1 Most Linksys routers use this address for the router You should get a home page similar to the following Figure 65 Router Home Page Look for a tab that will take you...

Page 174: ...u are using one of the Microsoft environments the Winsock protocol which is part of the Windows operating system can be used Similar capabilities are supported on other operating systems To use Winsoc...

Page 175: ...for the instrument is displayed 4 See the readme file included with the application for more information To run the LXI Discovery Browser software 1 From the Microsoft Windows Start menu select Keith...

Page 176: ...as a serial tag which is placed on the rear of the unit The MAC address may be displayed with the query command SYST COMM LAN MACA Note If the MAC Address displayed is corrupted or does not match the...

Page 177: ...24 255 255 0 016 255 0 0 0 8 Any change to this value will NOT take effect until after power on the unit has been cycled Port No TCP remote port number This value must be set to 5025 SCPI to support...

Page 178: ...m 100 10 1 63 bytes 32 time 1ms TTL 64 Reply from 100 10 1 63 bytes 32 time 1ms TTL 64 Reply from 100 10 1 63 bytes 32 time 1ms TTL 64 Reply from 100 10 1 63 bytes 32 time 1ms TTL 64 Ping statistics f...

Page 179: ...nterface you will need to follow the directions for Setting Up the PC to Use the USB Connection on page 108 Once you ve done that and you have a USB connection from the power supply to a PC verify the...

Page 180: ...ection uses the National Instruments MAX program to communicate with the power supply This is for demonstration purposes only Any software that is capable of addressing a serial device and sending and...

Page 181: ...Series 2268 850 Watt DC Power Supplies Reference Manual LAN Ethernet Setup and Communication 2268S 901 01 Rev A January 2015 179 Figure 69 Serial Settings Figure 70 Flow Control Settings...

Page 182: ...01 Rev A January 2015 Figure 71 I O Settings The Configuration for Serial Settings and Flow Control Settings should be the same as the above figures In the I O settings check the Enable Termination C...

Page 183: ...r which in this case is r Figure 72 Verifying Correct Termination Character Before starting communicating with the power supply you need to first set the address from what you set the unit to via fron...

Page 184: ...the command query SYST COMM LAN ADDR Figure 73 Verifying IP Address of Power Supply If the response to that query is 0 0 0 0 that means the unit is in DHCP mode and it received that address from a DH...

Page 185: ...ommunication 2268S 901 01 Rev A January 2015 183 Figure 75 Verifying the Static IP Address was Set To verify that the IP address was set query the address using SYST COMM LAN ADDR and the response to...

Page 186: ...From the front panel controls verify the communication port is set to RS232 the baud rate is set to 9 6 and the desired address 1 31 Note the factory default Baud rate is set to 9600 Baud Connect the...

Page 187: ...section uses the National Instruments MAX program to communicate with the power supply This is for demonstration purposes only Any software that is capable of addressing a serial device and sending a...

Page 188: ...LAN Ethernet Setup and Communication Series 2268 850 Watt DC Power Supplies Reference Manual 186 2268S 901 01 Rev A January 2015 Figure 78 Serial Settings Figure 79 Flow Control Settings...

Page 189: ...ould be the same as the preceding figures In the I O settings check the Enable Termination Character and choose Carriage Return r in the drop down menu for Termination Character Click Apply Changes Cl...

Page 190: ...ere N is the address For example if the unit address was set to 1 send the command ADR 1 Then send an identification query to the unit using IDN to verify communication Your response should be the ide...

Page 191: ...IP Address To set a Static IP Address use the command SYST COMM LAN ADDR N where N is the desired IP address you want to set Figure 84 Verifying the Static IP Address was Set To verify the IP address...

Page 192: ...set the LAN IP address The query format returns the IP address set To query the actual IP address used by the LAN interface in case the IP address is not static but assigned by a DHCP server the NCON...

Page 193: ...The unit is set to DHCP or Auto IP Command Syntax SYSTem COMMunicate LAN DEFault Parameters none Example SYST COMM LAN DEF Query Syntax no query for this command Returned Parameters none SYSTem COMMu...

Page 194: ...ommand Syntax SYSTem COMMunicate LAN PASSword SRD Parameters SRD Example SYST COMM LAN PASS admin Query Syntax SYST COMM LAN PASS Returned Parameters SRD SYSTem COMMunicate LAN PORT This command will...

Page 195: ...SCPI commands The following items need to be calibrated Programmed voltage Voltage readback Programmed current Current readback Non isolated voltage monitoring Isolated voltage monitoring Non isolate...

Page 196: ...the measured versus programmed line Offset error is the magnitude of the measured value when the programmed value is zero Calibrating one will affect the other so an iterative calibration procedure i...

Page 197: ...ation Measured Value Programmed Value Programmed Value Adjust the gain so that the real line and ideal line intersect at a programmed value of 90 Step 2 Offset Calibration Figure 87 Calibration Step 2...

Page 198: ...CAL STOR command is issued Without calling this command the new calibration will be lost after a power cycle If desired the unit may be returned to its calibration state when it shipped from the facto...

Page 199: ...d the voltmeter to On 4 Set the current set point to maximum Set the supply output to 90 of the nominal voltage level 5 Turn on the output power 6 Read the voltage value on voltmeter display 7 Type th...

Page 200: ...o 5 04 A and the ammeter was reading 5 07 amps Offset Calibration Offset calibration of the power supply provides the best accuracy in low range current To perform offset calibration 1 After performin...

Page 201: ...to be Off 3 Set the voltage set point to be 90 of the model voltage and the current to be 10 of the model current 4 Turn on the main power output 5 Execute the OVP calibration SCPI command CAL PROT 6...

Page 202: ...the voltmeter to the non isolated voltage monitoring output lines J1 13 J1 7 3 Set the Voltage APG level to 4 V Send the SCPI command SYST COMM APR LEV 4 4 Set the input source as Local Send the SCPI...

Page 203: ...t APG level to 4 V Send the SCPI command SYST COMM APR LEV CURR 4 4 Set the input source as Local 5 The SCPI command is SYST REM SOUR CURR LOC 6 Set the main output voltage to 100 by sending the comma...

Page 204: ...amming J1 9 J1 7 3 Set the Voltage APG level to 4 V Send the SCPI command SYST COMM APR LEV 4 4 Set input source voltage to 4 000 V 5 Set the input source as Voltage Non Isolated for Voltage Programmi...

Page 205: ...onnector resistive programming of voltage and voltage programming J1 9 J1 11 and J1 7 3 Set the resistive APG level to 4k The SCPI command is SYST COMM APR LEV 4 4 Set the input source as Resistive No...

Page 206: ...the non isolated connector current programming J1 10 J1 7 3 Set the Voltage APG level to 4 V The SCPI command is SYST COMM APR LEV CURR 4 4 Set the input source voltage to 4 000 V 5 Set the input sour...

Page 207: ...l to resistive programming of current J1 12 and voltage programming of current J1 10 and the other terminal to the common J1 7 3 Set the resistive APG level to 4 k The SCPI command is SYST COMM APR LE...

Page 208: ...6 3 Set the Voltage APG level to 4 V The SCPI command is SYST COMM APR LEV 4 4 Set the input source to local for voltage analog programming The SCPI command is SYST REM SOUR LOC 5 Set the main output...

Page 209: ...command is SYST COMM APR LEV CURR 4 4 Set the input source to local for voltage analog programming the SCPI command is SYST REM SOUR CURR LOC 5 Set the main output voltage to 100 by sending the comman...

Page 210: ...connector J3 3 and J3 6 3 Set the Voltage APG level to 4 V The SCPI command is SYST COMM APR LEV 4 4 Set the input source voltage to 4 000 V 5 Set the input source as Voltage Isolated for Voltage The...

Page 211: ...e programming of voltage J3 8 and voltage programming of voltage J3 3 and the other to common J3 2 3 Set the resistive APG level to 4 k The SCPI command is SYST COMM APR LEV 4 4 Set input source as Re...

Page 212: ...o the Isolated connector J3 4 J3 6 3 Set the Current APG level to 4 V The SCPI command is SYST COMM APR LEV CURR 4 4 Set the input source voltage to 4 000 V 5 Set the input source as Voltage Isolated...

Page 213: ...current J3 7 and voltage programming of current J3 3 and the other to common J3 2 3 Set the Resistive APG level to 4 k The SCPI command is SYST COMM APR LEV CURR 4 4 Set the input source as Resistive...

Page 214: ...3 6 V 6 Turn the output power on 7 The power supply starts up in Constant Voltage mode 8 Read the input voltage value from the voltmeter connected in step 1 9 Type the SCPI input Voltage calibration c...

Page 215: ...a DC voltage source to the non isolated current APG input lines J1 10 and J1 7 3 Turn the power supply On 4 Set the Current APG level to 4 V Send the SCPI command SYST COMM APR LEV CURR 4 5 Set the i...

Page 216: ...RATION To restore factory calibration use the SCPI command for returning the power supply to factory calibration settings The SCPI Command s for these instructions are CALibration RESTore RESTORE DEFA...

Page 217: ...supply with no load running the tests in Step 5 Performing Functional Tests on page 23 4 If the tests show that the power supply is functioning normally check all load programming and monitoring conn...

Page 218: ...s reference SCPI CONFORMANCE INFORMATION Codes and Standards This power supply conforms to the following international standards IEEE Std 488 2 1992 IEEE Standard Codes Formats Protocols and Common Co...

Page 219: ...pported as defaults To place the unit in the command will cause an error to be pushed into the error queue SCPI Command Hierarchy SCPI is an ASCII based command language designed for use in test and m...

Page 220: ...hile some punctuation is sent with the string other markings are used to identify different elements of the command syntax and are not sent with the string The following punctuation is sent with the c...

Page 221: ...ameter is sent in its place Using Minimum and Maximum In the following example Minimum and Maximum are offered as alternative choices to declaring a specific parameter value CAL CURRent LEVel current...

Page 222: ...ets the SCPI command path to the root level Common Commands The IEEE 488 2 standard includes a set of common commands for functions such as reset and self test These common commands always start with...

Page 223: ...M NONE Numeric Parameters Numeric parameters are number representations such as decimal points optional signs and scientific notation Values such as MINimum and MAXimum are accepted as substitutes for...

Page 224: ...he analog isolated programming command start at the CALibration root node go through the OUTPut node and then move down past the VOLTage and CURRent nodes which appear at that level to the ANALog node...

Page 225: ...1 01 Rev A January 2015 223 ISOLated RESistive ISOLated CURRent ISOLated RESistive ISOLated VOLTage PROTection OVER RESTore DEFault INITiate IMMediate MEASure APRogram VOLTage DC ISOLated DC CURRent D...

Page 226: ...2268S 901 01 Rev A January 2015 LATch POLarity POWer STATe PowerON STATe AUXiliary STATe PowerON STATe PROGram READback STATe RECord STARt STOP DELete ALL REPeat STEP DWELl SOURce COMBine CSHare MODE...

Page 227: ...25 LEVel IMMediate AMPLitude SENSe PROTection INTerlock STATe TEMPerature LATCh STATus PRESet QUEStionable EVENt ENABle CONDition PTRansition NTRansition VOLTage EVENt ENABle CONDition PTRansition NTR...

Page 228: ...anuary 2015 NTRansition CSHare EVENt ENABle CONDition PTRansition NTRansition SHUTdown EVENt ENABle CONDition PTRansition NTRansition PROTection EVENt ENABle CONDition PTRansition NTRansition STANdard...

Page 229: ...nce 2268S 901 01 Rev A January 2015 227 TEST RESet IDENtify REMote STATe SOURce VOLTage CURRent COMMunicate APRogram LEVel VOLTage ISOLated CURRent ISOLated MCHannel ADDRess PON VOLT CURR ENA VOLT CUR...

Page 230: ...o communicate with This command is required even if you are using a single instrument Address 1 30 Yes Clear Status CLS STATus channel CLEar Clears all the status data structures N A Query the Error Q...

Page 231: ...w extra time for the command to run before sending another command approximately two seconds N A Save User Settings SAV SYSTem channel SAVE setting location Save a User Memory Setting N A Query Servic...

Page 232: ...SCALar APRogram VOLTage DC Measure and readback the voltage being input to the non isolated voltage analog programming input pin Yes Read Isolated APG Input Voltage MEASurement SCALar APRogram VOLTage...

Page 233: ...point immediate Current Set Point MAXimum MINimum Yes Set Constant Power Set point SOURce POWer LEVel Set constant power set point immediate Power Set Point Yes Set Constant Power Mode1 SOURce POWer...

Page 234: ...CURRent Sets the current output calibration level Current set in amps No Calibrate the Voltage controlled Non Isolated Voltage APG feature CALibration channel MONitor VOLTage Calibrate the voltage mon...

Page 235: ...OUTPut ANALog CURRent Calibrate the current analog programming system NR1 nothing for interactive mode Yes Calibrate the Voltage controlled Isolated Current APG feature CALibration channel OUTPut ANA...

Page 236: ...and Range Query Set Output Foldback Delay OUTPut channel PROTection FOLDback DELay Set the delay time seconds before foldback protection is triggered Delay 0 5 50 Yes Set Output Foldback Mode OUTPut...

Page 237: ...returns 0 if pass non zero value for failure Yes ID Query SYSTem channel IDENtify Query device ID string Yes Save User Preset SYSTem channel SAVE Save the user preset values Select any slot from 0 3...

Page 238: ...CURRent Alter or query the state of the remote programming current APG source LOCal AVOLtag e IAVoltage ARES istive IAResisti ve Yes Set Front Panel lock state SYSTem channel REMote STATe Change fron...

Page 239: ...annel OPERation ENABle Access the Operations Enable Register Enable Flags 0 65535 Yes Query Operation Status Event Register STATus channel OPERation EVENt Query the Operations Event Register Yes Set O...

Page 240: ...wn Positive Trans Filter Register Transition Flags 0 65535 Yes Query Operation Status Shutdown Protection Condition Register STATus channel OPERation SHUTdown PROTection CONDition Query the Operation...

Page 241: ...CONDition Query the Operations Condition Register Yes Set Operation Status Positive Transition Register STATus channel OPERation CSHare PTRansition Access the Operation Positive Trans Filter Register...

Page 242: ...onable Status Temperature Condition Register STATus channel QUEStionable TEMPerature CONDition Query the Questionable Temp Conditions Register Yes Set Questionable Status Temperature Enable Register S...

Page 243: ...TATus channel QUEStionable VOLTage NTRansition Access the Questionable Voltage Negative Trans Filter Register Transition Flags 0 65535 Yes Set Questionable Status Voltage Positive Transition Register...

Page 244: ...cess to the run state of the Sequence RUN STOP PAUSE Yes Program selected sequence end action PROGram channel REPeat Sets the number of times to repeat the sequence Repeat count 1 65534 INFinity Yes B...

Page 245: ...are detected The queue works on a first in first out FIFO basis If the queue overflows the last error in the queue is replaced with error 350 Queue Overflow When all errors have been read from the que...

Page 246: ...ameter so receiving SRE 0 1 is not allowed 109 Missing Parameter Fewer parameters were received than required for the header for example the SAV common command requires one parameter so receiving SAV...

Page 247: ...t could not be executed due to the current power supply state The following list is not exhaustive but does cover some of the more common conditions that may contribute to this error OVP UVP Set Point...

Page 248: ...Save Recall Memory Lost 315 Configuration Memory Lost 350 Queue Overflow A specific code entered into the queue in lieu of the code that caused the error This code indicates that there is no room in...

Page 249: ...o Output 1500 Vac AC Input to Chassis 1500 Vac Output to Chassis3 500 Vac 1 Current 0 51A minimum guaranteed 0 72A typically available Overcurrent protection each output is automatic non latching When...

Page 250: ...itude Up to 6 500 feet 2 000 m Installation Category II IEC 1010 1 Pollution Degree 2 IEC 1010 1 Mechanical Specifications Dimensions W H D 8 4 1 7 19 0 inch 214 43 6 483 mm Weight 11 lb 5kg Cooling F...

Page 251: ...ries 2268 850 Watt DC Power Supplies Reference Manual Specifications 2268S 901 01 Rev A January 2015 249 MECHANICAL DIMENSIONS Figure 89 850 Watt Mechanical Dimensions 20 to 40 V Models DC output cove...

Page 252: ...Specifications Series 2268 850 Watt DC Power Supplies Reference Manual 250 2268S 901 01 Rev A January 2015 Figure 90 850 Watt Mechanical Dimensions 60 V to 150 V Models...

Page 253: ...property of Keithley Instruments All other trademarks and trade names are the property of their respective companies Keithley Instruments Corporate Headquarters 28775 Aurora Road Cleveland Ohio 44139...

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