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BEHLMAN P1351, User'S Manual And Technical Reference Manual

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BEHLMAN P1351 User'S Manual And Technical Reference Manual Download Page 18

17

SECTION 4
P1351 AC POWER SUPPLY OPERATING CONSIDERATIONS

 

( RM option )

4.8

MECHANICAL OUTLINE

The figure below illustrates the mechanical layout of the P1351. The power supply is shown here with
the rack mount option installed. This option includes two brackets with handles and appropriate
hardware. When installed this option allows the unit to be secured to a EIA standard equipment cabinet
(rack).

4.9

RACK MOUNTING ( OPTION RM )

The RM option kit is supplied for units that are to be mounted in a standard EIA equipment rack. This
kit

 

includes two mounting brackets and associated hardware. The brackets are attached to the left and

right side panels using existing threaded inserts and the supplied screws. 

!

WARNING 

DO NOT substitute longer screws as these may damage internal parts and create a shock
hazard.

 Note that these brackets are intended to secure the front panel to the rack only. Due to the

weight of this device rear support must be provided by the equipment rack. Do not rely on RM brackets
only.

Summary of Contents for P1351

Page 1: ...SERVICE DEPARTMENT PHONE TOLL FREE 1 800 874 6727 OR WRITE BEHLMAN ELECTRONICS CORPORATION CUSTOMER SERVICE DEPARTMENT 80 CABOT COURT HAUPPAUGE NY 11788 3729 PHONE 631 435 0410 FAX 631 951 4341 FOR SALES INFORMATION PHONE 631 435 0410 NY OR 805 375 7046 CA USA 1 800 874 6727 NY OR 800 456 2006 CA FAX 631 951 4341 NY OR 805 498 2147 CA DATE 3 10 REV C ...

Page 2: ...in the presence of flammable gases or fumes Operation of any electrical instrument in such an environment constitutes a definite safety hazard KEEP AWAY FROM LIVE CIRCUITS Operating personnel must not remove equipment covers Component replacement and internal adjustments must be made by qualified maintenance personnel Do not replace components with power applied Under certain conditions dangerous ...

Page 3: ... the customer being liable for all shipping handling and repair costs When packing for reshipment use the original shock absorbent material and shipping container to preclude damage to the equipment Insure that the return authorization numbers RMA is available on the container for identification SHIPPING INSTRUCTIONS RACK MOUNTED UNITS 1 Box es must be double wall with minimum 350 lbs bursting tes...

Page 4: ...ation RMA number This number must be attached to the equipment sent back for warranty repair Equipment must be shipped back to Behlman prepaid No collect shipments will be accepted Behlman shall be excused from supplying warranty service if the unit s case has been open or if the unit has been subject to unauthorized repair All service outside the scope of this warranty shall be paid for by the Pu...

Page 5: ...V THIS PAGE INTENTIONALLY BLANK INSERT ADDENDUMS HERE ...

Page 6: ...Operation Under Fault Conditions 3 3 Connecting to Loads 3 4 Troubleshooting 4 0 OPERATING CONSIDERATIONS 4 1 Operating Into Linear Loads 4 2 Driving Reactive Loads 4 3 Driving Lamps 4 4 Driving Motors 4 5 Driving Non Linear Loads 4 6 Input Power Requirements 4 7 Output Noise 4 8 RM option Mechanical Outline 5 0 REMOTE INTERFACE OPTIONS 5 1 GPIB this section optional 5 2 RS232 this section optiona...

Page 7: ...Line power at 115 VAC 50 or 60Hz is applied to the input of the unit After passing through a noise filter the input AC is converted to a bulk DC link voltage This DC voltage is applied to the output inverter refer to the block diagram The output inverter is a switch mode power amplifier A sine wave signal of the desired frequency is developed by the control circuitry and applied to the input of th...

Page 8: ...pical 115 V 50Hz into pure resistive load OUTPUT NOISE 2 5 V peak to peak typ on low range into 10 ohms FRONT PANEL METERS VOLTMETER RESOLUTION 1 Volt ACCURACY 2 of reading 1digit RMS responding AMMETER RESOLUTION 01 Amp ACCURACY 2 of reading 5 of range RMS responding FREQUENCY RESOLUTION 1 Hertz ACCURACY 2 SETTING 1 Hertz PROTECTIVE CIRCUITS SHORT CIRCUIT Inverter latches off in response to outpu...

Page 9: ... can operate from a wide input voltage range but continuous full power operation requires a stiff 120V capable of suppling at least 20A The cord should be replaced with an IEC20 plug wired with the desired 20A plug to match the user s receptacle Consult with qualified electrician or Behlman if in doubt WARNING This equipment produces AC leakage current that may exceed dangerous levels This equipme...

Page 10: ...S VOLTAGE AND CURRENT LEVELS WHICH CAN BE LETHAL MIS APPLICATION OF THIS DEVICES MAY CAUSE SERIOUS INJURY OR DEATH THIS DEVICE IS INTENDED FOR USE BY QUALIFIED PERSONNEL ONLY The following section provides descriptions of the various features of the MODEL P1351 AC power supply front and rear panels Figure 3 1 below illustrates the various controls and indicators associated with this model Table 3 ...

Page 11: ...Indicates unit disabled due to overload short circuit Indicates the unit is in current limit due to overload 7 FREQ adjust control Multi turn control provides continuous adjustment of the power supply s output frequency See item 8 8 FREQ AMPS display LED readout of units output current or frequency 9 output ON OFF switch Push button switch toggles the power supply output on and off via an internal...

Page 12: ...ted 7 Set the VOLTS control to provide the desired output voltage and energize the load by pressing the OUTPUT switch It is also permissible to set the OUTPUT switch on and then slowly increase the output voltage with the VOLTS control The best procedure to use is load dependent See section 4 of this manual for additional information 8 To monitor the load current toggle the FREQ AMPS display to re...

Page 13: ...e event that the load is outside the range of the power source the output voltage will decrease or fold back its output voltage to limit the maximum current During fold back the output waveform remains sinusoidal This can be a useful feature for starting AC induction motors and other types of motion related loads In the event the load becomes short circuited the amount of fault current could rise ...

Page 14: ... and Lo output terminals vs HI and GND terminals See section 3 2 Check setting of OUTPUT switch See section 3 1 figure 3 1 Output voltage drops when load is connected Check load current to insure that the rating of the power supply is not exceeded This may be indicated by a blinking or steady constant current LED Output drops to zero when load is connected Overload LED is on Load in rush or surge ...

Page 15: ...Under the right conditions this could trip the overload protection circuits in the power source Certain transformers and solenoids inductance present the same problem Several methods can be used to prevent tripping the protection circuits in the power source One common method is to insert a limiting impedance in series with the load This could be a fixed resistor or NTC negative temperature coeffi...

Page 16: ...to start many types of motors with run currents up to 10 Amps 4 5 DRIVING NON LINEAR LOADS Loads utilizing rectifiers and SCRs interact with the AC power source and have a profound effect on the distortion of the output waveform Consider the use of a bridge rectifier followed by a capacitive filter The current waveform associated with this circuit is illustrated in figure 4 1 The input current to ...

Page 17: ...ne and receptacle The line cord supplied with the unit has standard north American NEMA 15P at one end This was done due to the fact that it is more convenient to most end users Although the cord itself can handle the current the line end should be changed to the appropriate mate for prolonged full power operation Failure to do so may cause overheating of the input line connection This may cause a...

Page 18: ... RACK MOUNTING OPTION RM The RM option kit is supplied for units that are to be mounted in a standard EIA equipment rack This kit includes two mounting brackets and associated hardware The brackets are attached to the left and right side panels using existing threaded inserts and the supplied screws WARNING DO NOT substitute longer screws as these may damage internal parts and create a shock hazar...

Page 19: ...trols N A A I or R Remote control see below N A Note options A I or R options are not considered field installable and must be factory installed Call a Behlman Sales representative for pricing and further information 5 0 REMOTE CONTROL OPTIONS The model P1351 is available with one of three choices of remote control options The table below summaries these options OPTION TYPE INTERFACE FEATURES GPIB...

Page 20: ...age 0 to 135 V or 0 to 270 V with 0 1 volt resolution Accuracy 2 of programmed value 1 digit from 10 to 100 of range Programming Range frequency 45 to 500 Hertz with 0 1 Hertz resolution Accuracy 2 of programmed value 1 digit Voltage Read Back 0 1 volt resolution 2 1 digit accuracy Frequency Read Back 0 1 amp resolution 2 1 digit accuracy Frequency Read back 1 Hertz resolution 1 Hertz accuracy ADD...

Page 21: ...E 488 BUS COMMANDS 1 Single Line Commands IFC Clears GBIB interface 2 Multi Line Command DCL Resets AC Power Supply to the quiescent state if a catastrophic failure is not present The only way to clear a catastrophic failure is to read the Power Supply s response by using the Status command 1 3 GPIB COMMUNICATION The embedded TMA receives ASCII encoded command strings via a GPIB IEEE 488 according...

Page 22: ...erate error message SET FREQ value Optional Sets frequency of output voltage to given value in Hz The following values are permitted 45 value 500 Default is 45 Hz only if SET FREQ SRN FREQ or SRX FREQ are not received Otherwise the values shall be used in the order stated SRX VOLT value Optional Sets maximum limit for SET VOLT command If SET VOLT value is greater than SRX VOLT value in a command s...

Page 23: ...ns minimum value to SET FREQ command If the SET FREQ value in a command string is less than the minimum limit an error message is generated and the setup command ignored Legal values are 45 value 500 If a value for SRN FREQ is not specified SRN FREQ defaults to 45 SET VLT0 Set LO voltage range SET VLT1 Set HI voltage range On dual range Power Supplies this command selects the LO or HI voltage rang...

Page 24: ...H0 cr lf Closes output relay contacts Connects AC Power Supply outputs to output terminal P1351ock The setup command specifiesthe voltage and frequency The setupcommand must be entered before the CLS CH0 command OPN CH0 cr lf Opens output relay contacts Disconnects output of AC Power Supply from output connector Ac Power Supply retains voltage and frequency assigned by setup command RST ACS CH0 Re...

Page 25: ...e messages and conditions exclude confidence and internal self test RESPONSE Status OK sp cr lf Device error messages F07ACSO DEV BIT TEST FAILURE description consisting of up to 60 characters cr lf TMA error messages All begin with F07ACSO MOD This message is followed by one explanatory message from the following text ILLEGAL NOUN AC Power Supply does not recognize illegal noun ILLEGAL NOUN MODIF...

Page 26: ...tastrophic Error Messages All begin with F00ACS0 DEV This message is followed by one explanatory message from the following text OVERTEMP FAULT cr lf The heatsink temperature has exceeded its upper limit The OVERTEMP LED on the front panel will light CURRENT LIMIT FAULT cr lf SHORT CIRCUIT FAULT AC SUPPLY cr lf An output loading fault has occured causing the supply to exceed 500 rated current outp...

Page 27: ...response space cr lf Positive response indicating status is OK F07ACS00 MOD ILLEGAL VALUE cr lf Negative response indicating error condition Typically a negative response would only occur if an error existed in the entry or reception of the command string or the values entered were out of range of the P1351 Source Transmit output relay close command CLS CHO cr lf Transmit status command to request...

Page 28: ...e response space cr lf Positive response indicating status is OK Transmit output relay close command CLS CHO cr lf Transmit status command to request status response STA cr lf Talk address the P1351 Source to enable response space cr lf Positive response indicating status is OK Transmit fetch volt command FTH VOLT cr lf Talk address the P1351 Source to enable response 115 0 cr lf Transmit fetch cu...

Page 29: ...IZATION The RS232 interface may be connected to modems controllers computers or any other equipment capable of communicating with the RS232 protocol It is assumed in the remainder of this document that the RS232 interface is connected to a host computer The interface is configured to communicate with the following format Duplex Full Baud Rate 9600 Bits 8 Parity None Stop Bits 1 Other BAUD rates ho...

Page 30: ...able 5 2 1 CILL SOFTWARE COMMANDS CIIL COMMANDS EXPLANATION SET VOLT value Sets output voltage to given value in volts rms The following values are permitted 0 value 135 or 270 dependent on range selected and type of unit SET FREQ value Optional The following values are permitted 45 value 500 Default is 45 Hz only if SET FREQ SRN FREQ or SRX FREQ are not received Otherwise the values shall be used...

Page 31: ... minimum limit an error message is generated and the setup command ignored Legal values are 45 value 500 If a value for SRN FREQ is not specified SRN FREQ defaults to 45 SET VLT0 Set LO voltage range SET VLT1 Set HI voltage range This command selects the LO or HI voltage range Ranges are 0 135 volts and 0 135 0 270 volt If this command is omitted from the setup string the unit will default to the ...

Page 32: ...H0 cr lf eos Closes output relay contacts Connects AC Power Supply outputs to output terminal P1351ock The setup command specifiesthe voltage and frequency The setupcommand must be entered before the CLS CH0 command OPN CH0 cr lf eos Opens output relay contacts Disconnects output of AC Power Supply from output connector Ac Power Supply retains voltage and frequency assigned by setup command RST AC...

Page 33: ...onse messages and conditions exclude confidence and internal self test RESPONSE Status OK sp cr lf eos Device error messages F07ACSO DEV BIT TEST FAILURE description consisting of up to 60 characters cr lf eos TMA error messages All begin with F07ACSO MOD This message is followed by one explanatory message from the following text ILLEGAL NOUN AC Power Supply does not recognize illegal noun ILLEGAL...

Page 34: ...lure Errors are cleared whenever the AC Power Supply transmits a response except in the case of a short circuit fault which may only be cleared by cycling power to the AC Supply Catastrophic Error Messages All begin with F00ACS0 DEV This message is followed by one explanatory message from the following text OVERTEMP FAULT cr lf eos The heatsink temperature has exceeded its upper limit The OVERTEMP...

Page 35: ...s Transmit status command to request status response STA cr lf eos Talk address the P1351 Source to enable response space cr lf eos Positive response indicating status is OK F07ACS00 MOD NO SETUP cr lf Negative response indicating error condition Negative response would only occur if invalid or no setup string had been transmitted prior to close command EXAMPLE 2 Setup a dual range P1351 Source to...

Page 36: ...mit fetch volt command FTH VOLT cr lf eos Talk address the P1351 Source to enable response 115 0 cr lf eos Transmit fetch current command FTH CURR cr lf eos Talk address the P1351 Source to enable response 5 2 cr lf eos Transmit fetch frequency command FTH FREQ cr lf eos Talk address the P1351 Source to enable response 50 cr lf eos ...

Page 37: ...pply 2 0 SPECIFICATIONS 0 To 10VDC Control Input Impedance 10K ohms minimum Maximum Input Voltage 15 Vdc Control Input to Output Linearity 1 typical Control Response Time 250mS typical Output and Range Relay Control Current Digital mode 5mA to 15mA opto coupler series Resistor equals 2 2K ohms Contact closure mode 15 Vdc in series with 2 2K ohms Isolation Voltage 500 Vdc 500 Vac 60Hz 10 sec 3 0 CO...

Page 38: ...cuit to the power source should be shielded to prevent noise and electromagnetic interference from entering the remote inputs The maximum length of these cables is dependent on the control circuits drive capability It should be noted that some IC output stages may become unstable and oscillate when driving long cables with high capacitance Low output impedance buffers should be considered when lon...

Page 39: ...ers also known as shunts may be obtained from Behlman or from any electronics distributor These are standard shunts used throughout the computer industry to set board configurations and are for use on 0 1inch headers The Behlman part number is 102 473 000 The alternate configuration is illustrated below Note the internal 15 Vdc is now tied to pins 5 and 7 of the remote connector These connections ...

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