National Instruments RMX-4120 User Manual Download Page 5

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Contents

Attaching the Connector Cover ........................................................................................ 1-1
Connecting the Power Cord.............................................................................................. 1-1

RMX-4120/4121/4122/4123 (750 W Models) ......................................................... 1-2

Necessary Cable ............................................................................................... 1-2

RMX-4124/4125/4126/4127 (1500 W Models) ....................................................... 1-2

Necessary Cable ............................................................................................... 1-3
Switchboard Breaker Requirements ................................................................. 1-3

Connection Procedure............................................................................................... 1-4

Turning the Power On ...................................................................................................... 1-6

Turning the POWER Switch On .............................................................................. 1-6

Inrush Current................................................................................................... 1-7

Turning the POWER Switch Off.............................................................................. 1-7

Rack Mounting ................................................................................................................. 1-8
Load Considerations ......................................................................................................... 1-8

Loads with Peak Current or Pulse-Shaped Current .................................................. 1-8
Loads that Generate Reverse Current to the Power Supply ..................................... 1-9
Loads with Accumulated Energy ............................................................................. 1-9

Load Cables ...................................................................................................................... 1-10

Protecting Against Noise .......................................................................................... 1-11
Cabling Considerations When Using Remote Sensing ............................................ 1-11

Connecting to the Output Terminals ................................................................................ 1-12

Attaching the Output Terminal Cover ...................................................................... 1-15

Sensing.............................................................................................................................. 1-17

Local Sensing ........................................................................................................... 1-19
Remote Sensing ........................................................................................................ 1-19

Connecting an Electrolytic Capacitor Across the Load.................................... 1-22
Inserting a Mechanical Switch Between the RMX Programmable
Power Supply and the Load.............................................................................. 1-22

Accessories ....................................................................................................................... 1-23

Parallel Operation Signal Cable ............................................................................... 1-23

Chapter 2
Basic Functions

Measured Value Display and Setting Display.................................................................. 2-1

Measured Value Display .......................................................................................... 2-1

Power Display................................................................................................... 2-1

Setting Display ......................................................................................................... 2-2
Overvoltage Protection and Overcurrent Protection Setting Display....................... 2-2
System Configuration Setting Display ..................................................................... 2-2

Panel Operations............................................................................................................... 2-3

Summary of Contents for RMX-4120

Page 1: ...RMX RMX Programmable Power Supplies User Manual RMX 4120 RMX 4121 RMX 4122 RMX 4123 RMX 4124 RMX 4125 RMX 4126 RMX 4127 RMX Programmable Power Supplies User Manual February 2017 375744C 01...

Page 2: ...terminal Chassis frame terminal On supply Off supply Support Worldwide Technical Support and Product Information ni com Worldwide Offices Visit ni com niglobal to access the branch office Web sites w...

Page 3: ...ESS FOR A PARTICULAR PURPOSE TITLE OR NON INFRINGEMENT AND ANY WARRANTIES THAT MAY ARISE FROM USAGE OF TRADE OR COURSE OF DEALING NI DOES NOT WARRANT GUARANTEE OR MAKE ANY REPRESENTATIONS REGARDING TH...

Page 4: ...es independent from National Instruments and have no agency partnership or joint venture relationship with National Instruments Patents For patents covering National Instruments products technology re...

Page 5: ...the Power Supply 1 9 Loads with Accumulated Energy 1 9 Load Cables 1 10 Protecting Against Noise 1 11 Cabling Considerations When Using Remote Sensing 1 11 Connecting to the Output Terminals 1 12 Att...

Page 6: ...NFIG Settings 2 24 Specifying CF00 CF40 CONFIG Settings 2 25 CONFIG Parameter Details 2 25 Preset Memory Function 2 39 Saving Settings to Preset Memory 2 39 Recalling Preset Memory Entries 2 40 Lockin...

Page 7: ...1 Features of the RMX Programmable Power Supplies During Master Slave Parallel Operation 4 1 Voltage Display and Current Display 4 1 Connection Master Slave Parallel Operation 4 3 Connecting the Signa...

Page 8: ...ff 4 11 Chapter 5 Maintenance Calibration Overview 5 1 Calibration Procedure 5 1 Installation 5 1 Launch 5 1 Calibration Items 5 2 Basic Instructions 5 3 Save Calibration 5 3 Backup Calibration Data t...

Page 9: ...supply Figure 1 1 Connector Cover Connecting the Power Cord This product is a piece of equipment that conforms to IEC Overvoltage Category II equipment that consumes energy supplied from a fixed inst...

Page 10: ...ut rating of the product The product can receive a nominal line voltage in the range of 100 VAC to 240 VAC at 50 Hz or 60 Hz 2 Check that the POWER switch is turned off 3 Connect the power cord to the...

Page 11: ...witchboard Breaker Requirements Installation must be done in accordance with national wiring rules such as NFPA 70 NEC and CSA C22 1 CEC Rated current 30 A for safety breakers whose rated current exce...

Page 12: ...d off 3 Attach a crimping terminal to the GND wire Figure 1 3 Attaching the Crimping Terminal 4 Connect the power cord and the included INPUT terminal cover to the AC INPUT terminal on the rear panel...

Page 13: ...ect Incorrect The stripped wire is touching the chassis The wire strands are touching the chassis INPUT terminal cover INPUT terminal cover INPUT terminal cover AC INPUT terminal L Black or brown N Wh...

Page 14: ...gs Each subsequent time you turn the power supply on it starts with the panel settings excluding the output on off setting that were in use immediately before the POWER switch was turned off You can u...

Page 15: ...supplies save the panel settings except the output on off setting that were in use immediately before the POWER switch was turned off You can use CONFIG settings CF02 to select how the RMX programmabl...

Page 16: ...pes of loads are connected Loads with Peak Current or Pulse Shaped Current The front panel of the RMX power supply only displays averaged voltage and current values If the supply is connected to a loa...

Page 17: ...D If a resistor with insufficient rated power for the circuit is used the resistor will burn out Loads with Accumulated Energy Connecting a load with accumulated energy such as a battery to an RMX pro...

Page 18: ...specified insulation voltage of the product to secure the double insulation or reinforced insulation The current capacity of a load cable is dependent on the maximum allowable temperature of the cabl...

Page 19: ...esistance of your load cabling the voltage drop between the RMX power supply and your load will increase This results in the voltage at your load being smaller than the programmed voltage setpoint Ref...

Page 20: ...ch on Confirm that the voltage between any output terminal and ground is lower than the isolation voltage of the RMX programmable power supply Figure 1 9 RMX 4125 Output Terminal 1 Turn the POWER swit...

Page 21: ...crimping terminals that are appropriate for the bolts that you are using 4 Use the included bolt set to connect the load cables to the output terminals Connect the positive cable to the positive outpu...

Page 22: ...22 4123 4126 4127 Note If you do not connect load cables in the correct orientation you will not be able to attach the OUTPUT terminal cover Spring washer Washer Nut Bolt M8 Crimping terminal Attach t...

Page 23: ...e between 10 mm and 18 mm in diameter Put the top and bottom halves of the OUTPUT terminal cover together so that the hole diameter is large 1 Remove the screw that is attached next to the output term...

Page 24: ...protrusion of the top half of the cover with the top section of the protrusion of the bottom half Bottom half of the cover For thick load cables Cover hole diameter 10 mm to 18 mm Cover hole diameter...

Page 25: ...nd damage to internal circuits Never wire the sensing terminals while the POWER switch is turned on Use sensing cables that provide reinforced or double insulation with a capacity greater than or equa...

Page 26: ...point is set the OVP will trip before an excessive voltage is generated When you are finished with remote sensing return to local sensing mode Figure 1 19 Sensing Cable Connections Table 1 2 Sensing T...

Page 27: ...n voltage Refer to the Load Cables section for more information about the cables When using remote sensing the output terminals compensate for the voltage drop across the load cabling by increasing th...

Page 28: ...5 Pinch the tip of the band and remove the band from the connector cover Figure 1 22 Bottom Cover with Band 6 As shown in the figure create a ring 40 mm away from the connector and fasten with the ba...

Page 29: ...connector cover to the panel with the included screws and then insert the tip of the band into the hole of the cover Finally bring the top and bottom sides of the connector cover together and fasten...

Page 30: ...the load cables which stabilizes the voltage However if this does not rectify the problem connect an electrolytic capacitor across the load Inserting a Mechanical Switch Between the RMX Programmable...

Page 31: ...t National Instruments Parallel Operation Signal Cable This cable is used when you perform parallel operations The following three types are available Figure 1 26 Parallel Operation Signal Cable Part...

Page 32: ...ll change the output voltage and current settings while in this state but the front panel will continue to display the values measured at the output Refer to the Using the RMX Programmable Power Suppl...

Page 33: ...preset memory entry are displayed on the panel Overvoltage Protection and Overcurrent Protection Setting Display Press OCP OVP to light its LED and display the present overcurrent protection and overv...

Page 34: ...by reaches the smallest display digit of the set voltage or current Fine Adjustment Holding down the SHIFT key while turning the VOLTAGE or CURRENT knobs allows for finer adjustment of the programmed...

Page 35: ...urn the RMX programmable power supply off Caution If you change the load it may be damaged if the RMX programmable power supply OVP and OCP settings are not correct Operation Overview The RMX programm...

Page 36: ...ge 30 V Rated output power Rated output current Output voltage V Output current A RMX 4120 750 W RMX 4124 1500 W Rated output power 0 10 20 30 40 50 80 RMX 4120 60 70 75 RMX 4124 90 80 70 60 50 40 30...

Page 37: ...4126 1500 W Rated output voltage 230 V Rated output power Rated output power Rated output current RMX 4122 RMX 4126 Output voltage V Output current A 700 600 500 400 300 200 100 0 0 1 2 3 4 5 7 8 6 Ra...

Page 38: ...ter than the compliance resistance RC the operating point falls in area A and the RMX programmable power supply will operate in CV mode point p In this case the set current IS operates as a current li...

Page 39: ...ted output current of 10 A as an example Example 1 A load resistance RL of 8 is connected to the output terminals of the power supply The output voltage and output current are set to 30 V and 5 A resp...

Page 40: ...wer supply automatically switches its operation mode When the RMX programmable power supply switches its operation mode the lit LED in the display area CV LED or CC LED changes to indicate the switch...

Page 41: ...ze CV or CC mode when powering on the output Set this according to the operation mode that you are using You can prevent overshoot from occurring when the output is turned on by prioritizing CV when u...

Page 42: ...lowing protection functions Overvoltage protection OVP Overvoltage protection 2 OVP2 Overcurrent protection OCP Undervoltage limit UVL Overheat protection OHP Overheat protection 2 OHP2 Fan failure pr...

Page 43: ...ghts to indicate that an alarm has occurred The voltmeter display indicates the cause of the alarm The ALARM LED on the front panel blinks only when a POWER LIMIT alarm has occurred The OUTPUT LED on...

Page 44: ...he output is turned off You can use the CONFIG settings to select how the RMX programmable power supply will perform after the problem that caused the alarm is fixed You can select to turn the output...

Page 45: ...the UVL trip point to a value that exceeds the set output voltage If you have selected to limit the current setting CF14 on the valid programmable current values will be limited to currents that are...

Page 46: ...OVP trip point You can use the CONFIG settings to set the detection time of the OCP activation CF13 Figure 2 17 OVP and OCP Trip Point Displays 1 Press OCP OVP The OCP OVP key LED lights up and the OV...

Page 47: ...play area is turned off 2 Set the output voltage to a value lower than the OVP trip point 3 Press OUTPUT to turn output on The OUTPUT LED lights 4 Slowly turn the VOLTAGE knob clockwise When the outpu...

Page 48: ...output off CONFIG setting CF15 allows you to choose whether the output setpoint is limited so that it cannot be set to a value lower than the UVL trip point Complete the following steps to set the UV...

Page 49: ...d turn the POWER switch off and on If you do not fix the problem that caused the OHP or OHP2 to be activated OHP or OHP2 will be activated again even if you restart the RMX programmable power supply F...

Page 50: ...is function limits the output power to a value that is approximately 105 of the rated output power This function does not turn the output off When the power limit function has been activated the ALARM...

Page 51: ...ter that may be affected when the panel settings are reset CF00 or when a preset memory entry is loaded indicates a parameter that may be affected when the master unit the slave unit or the number of...

Page 52: ...CF061 CV control using an Vext or Rext A CF071 CV CC control range parameter A CF08 Range during voltage and current monitoring A CF091 External control parameterforturningoutput onandoff A CF101 Ext...

Page 53: ...C CF42 Manual IP address setting 1 B or C CF43 Manual IP address setting 2 B or C CF44 Manual IP address setting 3 B or C CF45 Manual IP address setting 4 B or C CF46 IP address subnet mask prefix se...

Page 54: ...by pressing SET CF00 and CF40 CONFIG key CONFIG key CONFIG key CONFIG key Displayed only when the RMX series is being used as a slave unit CONFIG key CONFIG key Displayed only when the LAN interface...

Page 55: ...alue display When you turn the CURRENT knob the RMX programmable power supply increments through the parameter numbers within the currently selected parameter range Tip Press CONFIG or turn the CURREN...

Page 56: ...er number and the setting are blinking no new settings will be applied until you press SET When setting CF00 the measured value display appears When CF40 is set the LAN LED lights in orange for about...

Page 57: ...n This setting is invalid when you are using an external contact to turn the output off This parameter only applies when you turn the POWER switch off and on You can only specify this parameter when t...

Page 58: ...hether to display the saved contents in the preset memory before recalling them You can use this CONFIG parameter if you forget what settings have been saved to a preset memory entry or if you want to...

Page 59: ...constant voltage with an external voltage or an external resistance the J1 connector You can only specify this parameter when the RMX programmable power supply is being used as a master unit CF08 Ran...

Page 60: ...he bleeder circuit off when you don t want the electric charge stored in the output capacitance of the supply to sink into the internal bleeder circuit such as when you are charging a battery Even whe...

Page 61: ...rent Setting Limit Set whether to limit the set output current so that its value cannot exceed the set overcurrent protection approximately 95 of the OCP trip point When this parameter is set to oFF a...

Page 62: ...ing used as a master unit CF16 Panel Display Brightness Setting Adjusts the panel display brightness The larger the number the brighter the display Even if you specify the same number the brightness m...

Page 63: ...interface function even when a LAN cable is connected You cannot set the LAN CONFIG settings while this parameter is turned off Even when this is set to on if the command language is set to legacy CF2...

Page 64: ...unication errors The errors are only displayed when you are using the SCPI language Value Parameter Description SCPi The SCPi language will be used factory default setting LGCy Legacy languages will b...

Page 65: ...when you execute CF34 CF30 to CF33 IP Address Display These parameters display the set IP addresses These parameters are only displayed when you are using the LAN interface To set a fixed IP address...

Page 66: ...be set only when the LAN interface is in use Set whether to use on 1 or not use off 0 the following DHCP server AUTO IP function automatic assignment and MANUAL IP assignment If an IP address is not...

Page 67: ...e LAN interface is in use These parameters are applied when you turn the POWER switch off and on when you execute APPL with CF40 Value Display Parameter Description _ _ DHCP OFF AUTO IP OFF MANUAL IP...

Page 68: ...SCPI RAW Protocol TCP Port Number Setting Set the TCP port number of the SCPI RAW protocol for when the LAN interface is in use This parameter is applied when you turn the POWER switch off and on or...

Page 69: ...meter is applied when you restart the RMX programmable power supply Display Description 3923 0x3923 Display Description 78A3 RMX4121 0x78A3 78A4 RMX4122 0x78A4 78A6 RMX4124 0x78A6 78A7 RMX4125 0x78A7...

Page 70: ...oltage and current settings will be displayed on the panel 2 While viewing the values displayed on the panel use the VOLTAGE and CURRENT knobs to program the setpoint values you d like to write to mem...

Page 71: ...d contents for confirmation and recall 1 Press SHIFT the memory key A B or C from which you want to recall the preset memory entry The SET LED and the contents voltage and current of the loaded preset...

Page 72: ...and off Turn the bleeder circuit off when you do not want the internal bleeder circuit to sink output current When you connect a battery you can prevent excessive electrical discharges by turning the...

Page 73: ...ge If the output terminal voltage is near 0 V hardly any current will be sunk even when the bleeder is on Table 2 5 Sink Current From an External Source when Bleeder is On Off Model Bleeder Circuit Si...

Page 74: ...ses gradually at output terminal voltages lower than this voltage If the output terminal voltage is near 0 V hardly any current will be sunk even when the bleeder is on Table 2 7 Sink Current From an...

Page 75: ...RMX programmable power supply is being controlled remotely the REMOTE LED in the display area lights To switch the RMX programmable power supply to local mode from the front panel press LOCAL Table 2...

Page 76: ...tings Parameter Number CONFIG Parameter Parameter Description CF01 Master slave parallel operation parameter 1 independent operation CF021 Power on status parameter SAFE panel settings that were in us...

Page 77: ...ng remote control NONE RMX programmable power supply commands CF23 SCPI communication error display parameter OFF not displayed CF24 Multichannel VMCB domain number 0 the multichannel function is not...

Page 78: ...e or external resistance Turning output on and off using an external contact Output shutdown control using an external contact Clearing alarms using an external contact Monitoring operation modes Abou...

Page 79: ...3 2 Unlocking the Snap on Core 2 Wrap the cable twice around either half of the open core Wrap the wire so that the distance between the core and the J1 connector is within 30 mm Figure 3 3 Wrapping...

Page 80: ...ter slave parallel operation 9 PRL COMP IN Correction signal input terminal for master slave parallel operation 10 A COM External signal common for pins 5 to 9 11 to 13 20 to 22 24 and 25 During remot...

Page 81: ...07 Lo 0 to 10 V 0 to 100 of the rated output current CF07 Hi 22 V PGM Terminal used to control the output voltage with an external voltage or external resistance 0 to 5 V 0 to 100 of the rated output...

Page 82: ...rogrammable power supply ships from the factory If you damage or lose the detachable plug contact National Instruments for a replacement To minimize the influence of noise NI recommends using shielded...

Page 83: ...HP2 FAN SEN ACAC FAIL is activated output through an open collector photocoupler 1 4 PWR ON STATUS Outputs a low level signal when power is turned on output through an open collector photocoupler 1 5...

Page 84: ...that are connected to the output terminal including the sensing terminal must have a reinforced or double insulation with a capacity that is greater than or equal to the isolation voltage of the RMX...

Page 85: ...ENS L N Load Rext RMX Vext Because the output terminal is floating the section shown on a gray background must have a reinforced or double insulation with a capacity greater than or equal to the RMX i...

Page 86: ...t voltage of the RMX programmable power supply with respect to the chassis There is no need to provide insulation that is greater than or equal to the isolation voltage of the RMX programmable power s...

Page 87: ...e positive output terminal is at ground potential the section shown on a gray background must have a reinforced or double insulation with a capacity greater than or equal to the maximum output voltage...

Page 88: ...cause the cable to be damaged Refer to Figures 3 10 and 3 11 for more information If you are connecting the shield to the Vext side do not connect the shield to the output terminal of the RMX programm...

Page 89: ...hielded cables for the connection for uncovered sections of the shielded cables use insulation tubes to secure reinforced or double insulation with a capacity greater than or equal to the isolation vo...

Page 90: ...utput terminal Refer to Cautions When Controlling the Output with an External Voltage Vext if the shield needs to be connected to the Vext side Use pins 22 and 23 of the J1 connector Control Using an...

Page 91: ...Current This section explains how to control the output current using an external voltage Vext or an external variable resistor of approximately 10 k Rext Caution Risk of electric shock If neither out...

Page 92: ...external voltage control pins External voltage source Vext connection Connect a low noise stable voltage source to Vext The noise in Vext is multiplied by the amplification factor of the RMX programm...

Page 93: ...anged in the range of 0 to 5 V CF07 Lo or in the range of 0 to 10 V CF07 Hi External Resistance Rext Connection For Rext use a resistor that is rated at approximately 10 k 1 2 W or greater that has a...

Page 94: ...er supply To reduce the noise on the output connect a 2 core shielded wire or a twisted pair wire and keep the wire as short as possible If the wiring is long it becomes easy for noise to influence th...

Page 95: ...to turn output on and off for all the units use a relay or similar device for the external contact signal to isolate the signal transmitted to each unit Long Distance Wiring When you are wiring over...

Page 96: ...uncovered sections of the shielded cables use insulation tubes to secure reinforced or double insulation with a capacity greater than or equal to the isolation voltage of the RMX programmable power s...

Page 97: ...ion of the external contact S and the connected cable must be greater than or equal to the isolation voltage of the RMX programmable power supply Refer to Appendix A Specifications for the isolation v...

Page 98: ...LOW 0 to 0 5 V or short circuit to pin 5 of the J1 connector the alarms will be cleared Alarm Clear Connection Connect your external contact between pins 5 and 19 of the J1 connector The open circuit...

Page 99: ...utput signals are used to monitor the DC voltage mean value They cannot be used to accurately monitor the AC components such as ripple and transient response waveform of the actual output voltage or c...

Page 100: ...nal Monitoring of the J2 Connector Signal Terminals Operation Status Pin Signal Description Circuit 6 9 STATUS COM This is the status output common This is the photocoupler emitter output 1 CV STATUS...

Page 101: ...ution When using the RMX programmable power supply independently or when there are units not using parallel operation disconnect the parallel operation connections Otherwise the RMX programmable power...

Page 102: ...the master unit External monitoring of the output current I MON You can monitor the output current of the master unit and each slave unit Use the master unit to monitor the total output current Statu...

Page 103: ...and then turn on the master unit Connection Master Slave Parallel Operation You can connect up to four units including the master unit Connecting the Signal Cables Parallel Operation Use the J1 conne...

Page 104: ...fter you finish wiring the load When you connect the output terminals to the chassis terminals be sure to connect the same polarity output terminals positive or negative of the master unit and the sla...

Page 105: ...ch power supply to the relay terminal block and wire the cables so that they are as short as possible 50 cm or less Also make the connection from the relay terminal block to the load block as short as...

Page 106: ...umber of units in master slave parallel operation CF01 the maximum output current 105 of the rated output current of a single unit the number of units in parallel is set If you switch to the setting d...

Page 107: ...the POWER switch off wait at least 10 seconds after the panel display turns off before you turn the POWER switch back on Repeatedly turning the POWER switch on and off at short intervals can cause dam...

Page 108: ...the RMX programmable power supplies during series operation are as follows Voltage Display and Current Display The voltage and current are displayed on unit 1 and unit 2 To calculate the total output...

Page 109: ...t the sensing cables to them as shown in the following figure Caution If the sensing cables are not connected properly the load may be exposed to excessive voltage and the RMX programmable power suppl...

Page 110: ...Operation You can connect up to two units Caution Risk of electric shock Turn the POWER switch off before you touch the OUTPUT terminals Attach the OUTPUT terminal cover after you finish wiring the l...

Page 111: ...Series Operation Setting the Voltage and Current Set the voltage and current on each unit The voltage that is output is the total of the voltages of the two units Set the current to the same value on...

Page 112: ...librate RMX programmable power supplies yourself follow the procedures below All of the calibration items of the RMX programmable power supplies are described Calibration Procedure Installation Launch...

Page 113: ...alibration Items There are eight calibration items where you should do in the specified order VOLTAGE SET OFST VOLTAGE SET GAIN VOLTMETER SET OFST VOLTMETER SET GAIN CURRENT SET OFST CURRENT SET GAIN...

Page 114: ...is not yet saved in the instrument EEPROM So you need commit EEPROM data Select Data Commit EEPROM menu This operation immediately commits the EEPROM so that the new data is persistent after next powe...

Page 115: ...lowing environment Temperature 23 C 5 C Humidity 80 rh or less Warm up the RMX programmable power supply for at least 30 minutes before calibration Also ensure to warm up the DVM and shunt resistor fo...

Page 116: ...5 5 RMX Programmable Power Supplies User Manual Connection Figure 5 1 Voltage Calibration Figure 5 2 Current Calibration DVM HI LO Output terminal Chassis terminal RMX Shunt DVM HI LO Output terminal...

Page 117: ...ge and the voltage that can be output with rated output current are as follows Maximum output current with rated output voltage Rated output power rated output voltage Maximum output voltage with rate...

Page 118: ...0 VAC 5 25 A Inrush Current MAX 2 70 A peak or less Power MAX 3 1100 VA Power factor TYP 1 0 99 input voltage 100 V 0 97 input voltage 200 V Efficiency MIN 1 74 or more Hold up time for power interrup...

Page 119: ...mV RMX 4122 120 mV RMX 4123 330 mV rms 5 RMX 4120 4121 8 mV RMX 4122 25 mV RMX 4123 60 mV Rise time Rated load 100 ms No load 100 ms 1 85 VAC to 135 VAC or 170 VAC to 265 VAC fixed load 2 The amount...

Page 120: ...to 29 4 A RMX 4122 0 to 10 5 A RMX 4123 0 to 3 675 A Setting accuracy 0 5 of setting 0 1 of rtg Line regulation RMX 4120 9 5 mA RMX 4121 4 8 mA RMX 4122 3 mA RMX 4123 2 35 mA Load regulation RMX 4120...

Page 121: ...een activated OUTPUT LED blinks orange CV operation CV LED lights green CC operation CC LED lights red Alarm operation ALM LED lights red when a protection function has been activated ALM LED blinks r...

Page 122: ...of the rated output voltage Overcurrent protection OCP 2 Turns the output off displays OCP and lights ALARM Setting range3 RMX 4120 7 5 to 84 A RMX 4121 2 8 to 31 36 A RMX 4122 1 to 11 2 A RMX 4123 0...

Page 123: ...monitor voltage range 0 to 5 V or 0 to 10 V Setting accuracy 2 5 of rtg Status signal output3 OUTON STATUS Turns on when the output is on CV STATUS Turns on during CV operation CC STATUS Turns on duri...

Page 124: ...urn the output off using a LOW 0 to 0 5 V or short circuit Output shutdown control SHUT DOWN Turns the output off with a LOW 0 to 0 5 V or short circuit Alarm clear control ALM CLR Clears alarms with...

Page 125: ...ty bit None No flow control Program message terminator LF during reception CR LF during transmission USB Hardware Complies with the USB 2 0 specifications Baud rate 480 Mbps high speed Socket B type P...

Page 126: ...21 4122 No abnormalities at 2000 VAC for 1 minute RMX 4123 No abnormalities at 2250 VAC for 1 minute Between output and FG RMX 4120 4121 No abnormalities at 1500 VDC for 1 minute RMX 4122 No abnormali...

Page 127: ...0 35 368 14 49 62 2 44 M3 screw holes 4 Max screw insertion depth 8 mm 0 31 inches MAX485 19 09 422 8 16 65 43 1 69 44 1 73 MAX580 22 83 MAX35 1 38 M4 screw holes 4 Max screw insertion depth 6 mm 0 31...

Page 128: ...terruption MIN 3 20 ms or greater DC Output Rating Output voltage4 RMX 4124 0 to 30 V RMX 4125 0 to 80 V RMX 4126 0 to 230 V RMX 4127 0 to 650 V Output current 4 RMX 4124 150 A RMX 4125 56 A RMX 4126...

Page 129: ...mV Rise time Rated load 100 ms No load 100 ms Fall time6 Rated load RMX 4124 4125 100 ms 1 85 VAC to 135 VAC or 170 VAC to 265 VAC fixed load 2 The amount of change that occurs when the load is chang...

Page 130: ...set 0 1 of rtg Line regulation RMX 4124 17 mA RMX 4125 7 6 mA RMX 4126 4 mA RMX 4127 2 7 mA Load regulation RMX 4124 35 mA RMX 4125 16 2 mA RMX 4126 9 mA RMX 4127 6 4 mA Ripple noise3 rms 4 RMX 4124 3...

Page 131: ...rns off The output is on and a protection function has been activated OUTPUT LED blinks orange CV operation CV LED lights green CC operation CC LED lights red Alarm operation ALM LED lights red when a...

Page 132: ...output current Overcurrent protection OCP 1 Turns the output off displays OCP and lights ALARM Setting range RMX 4124 15 to 168 A 10 to 112 of the rated output current RMX 4125 5 6 to 62 72 A 10 to 11...

Page 133: ...monitor voltage range 0 to 5 V or 0 to 10 V Setting accuracy 2 5 of rtg Status signal output3 OUTON STATUS Turns on when the output is on CV STATUS Turns on during CV operation CC STATUS Turns on dur...

Page 134: ...n circuit turn the output off using a LOW 0 V to 0 5 V or short circuit Output shutdown control SHUT DOWN Turns the output off with a LOW 0 to 0 5 V or short circuit Alarm clear control ALM CLR Clears...

Page 135: ...ity bit None No flow control Program message terminator LF during reception CR LF during transmission USB Hardware Complies with the USB 2 0 specifications Baud rate 480 Mbps high speed Socket B type...

Page 136: ...00 Vmax RMX 4127 600 Vmax Withstand voltage Between input and FG No abnormalities at 1500 Vac for 1 minute Between input and output RMX 4124 4125 4126 No abnormalities at 2000 Vac for 1 minute RMX 412...

Page 137: ...0 35 368 14 49 62 2 44 M3 screw holes 4 Max screw insertion depth 8 mm 0 31 inches MAX485 19 09 422 8 16 65 43 1 69 44 1 73 MAX580 22 83 MAX35 1 38 M4 screw holes 4 Max screw insertion depth 6 mm 0 31...

Page 138: ...art 15B Class A emissions ICES 001 Class A emissions Note In the United States per FCC 47 CFR Class A equipment is intended for use in commercial light industrial and heavy industrial locations In Eur...

Page 139: ...nt and to NI customers For additional environmental information refer to the Minimize Our Environmental Impact web page at ni com environment This page contains the environmental regulations and direc...

Page 140: ...to set the output voltage and output current to the required values Are you using an external contact to turn output on and off Use the external contact to turn output on If not set the external contr...

Page 141: ...is lower than the voltage value that is specified by UVL You cannot set the output voltage to a value that is lower than the voltage that is specified by UVL Check the voltage that is specified by UVL...

Page 142: ...ge is offset from the voltage that the RMX programmable power supply was generating when it was turned on Has 30 minutes passed since the power was turned on Warm up the RMX programmable power supply...

Page 143: ...ture too high The overheat protection function has been activated Check the operating environment The inlet may be clogged or the fan may be broken The ALARM LED lights when the load is changed Is a l...

Page 144: ...ddress cannot be obtained from the DHCP server Is the LAN LED lit in orange or red If it is lit in orange the RMX programmable power supply is waiting for a response from the DHCP server If it turns r...

Page 145: ...fy your systems accuracy and reliability requirements and provides warranty sparing and calibration services to help you maintain accuracy and minimize downtime over the life of your system Visit ni c...

Page 146: ...tions Engineers make sure every question submitted online receives an answer Software Support Service Membership The Standard Service Program SSP is a renewable one year subscription included with alm...

Page 147: ...21 crossover point 2 8 CV power supply 2 7 D display measured value 2 1 power 2 1 setting 2 2 E electromagnetic compatibility A 22 external control 3 1 F factory default settings 2 45 fall time 2 44...

Page 148: ...2 RMX 4127 dimensions A 21 specifications A 12 S safety specifications A 22 sensing cable connections 1 18 local 1 19 remote 1 19 terminals and functions table 1 18 series alarm 4 10 connection 4 10 e...

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