Downloadable Manual in PDF Format (less schematics)
Contents
1. 12 7 12 9 OVER VOLTAGE PROTECTION eene 12 7 Document 83 510 004 Rev C Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Table 1 Table 2 Table 3 Table 4 Table 5 Table 6 Table 7 Document 83 510 004 RevC List of Figures Front Panel Controls and Indicators 4 1 Back Panel Controls and Connectors 4 3 J1 Rear Panel Programming 4 4 Voltage and Current Mode Crossover 5 1 Wiring J1 Basic Programming 9 8 1 Wiring J1 Fully Loaded Programming Plug 8 2 Remote Voltage Sensing Diagram 9 2 Connecting Parallel Supplies 10 2 Master Slave Wiring the Programming Cable 10 3 Series Supplies 1 10 6 Wiring J1 Series Master Slave Mode 10 6 List of Tables Model Number 1 3 Input Power 3 1 Wire Sizes for Load 3 3 Front Panel Controls and Indicators 4 1 Bac2. 5 1 5 1 VOLTAGE MODE AND CURRENT 5 1 5 2 LOCAL PROGRAMMING USING FRONT PANEL KNOBS 5 2 5 3 ANALOG PROGRAMMING USING THE J1 CONNECTOR 5 2 5 4 THE IEEE RS232 PROGRAMMING 5 3 6 MEASURING THE OUTPUT 222 1 44 4 400 2 6 1 6 1 THE FRONT PANEL eene 6 1 6 2 MEASURING OUTPUT USING THE J1 6 1 6 3 THEIEEE RS232 MEASURING 6 2 7 PROTECTIVE SHUTDOWN dc a een 7 1 71 THE SHUTDOWN CONDITION esee nme 7 1 7 2 FRONT PANEL OVER VOLTAGE PROTECTION OVP 7 1 73 REMOTE INHIBIT USING J1 OPEN CONTACT 7 2 74 REMOTE ENABLE USING J1 AND DO eee 7 3 7 5 OVER TEMPERATURE 5 7 4 7 6 LOW LINE AC POWER SHUTDOWN eene 7 4 7 7 THE IEEE RS232 PROTECTION 7 4 Document 83 510 004 RevC 8 PROGRAMMING WITH J1 WIRING DIAGRAMS 8 1 81 WIRING LOCAL PROGRAMMING enm 8 1 8 2 WIRING PROGRAM VOLTAGE USING REMOTE RESISTANCE 8 3 8 3 WIRING PROGRAM VOLTAGE USING REMOTE V
3. 6 3 THE IEEE RS232 MEASURING OPTION The digital programming option includes commands to remotely measure the output voltage and the current See Specification Section 11 for digital measuring accuracy See the Lambda EMI document User Manual For Embedded IEEE Option document number 83 468 007 for further details Document 83 510 004 Rev C Protective Shutdown 7 1 7 PROTECTIVE SHUTDOWN 7 1 7 2 7 2 1 THE SHUTDOWN CONDITION There are several events either intentional or accidental which will cause the ESS to shut down its output During a shutdown the output power FETs are turned off After a shutdown the output rectifier diode will prevent the charge from a capacitive load from flowing into the POS bus bar but it will allow current from an inductive load to freewheel into the NEG bus bar Recovery from a shut down event varies with the cause of event FRONT PANEL OVER VOLTAGE PROTECTION OVP The ESS comes standard with a user settable Over Voltage Protection OVP feature It is used to protect the user s load by shutting down the ESS if its output voltage goes too high The ESS voltage could go too high if e Anoperator adjusts the ESS front panel knobs too high e There is a miswired or a damaged remote programming or sensing line e Acurrent regulated load opens up and the voltage shoots up e An ESS internal malfunction causes the output voltage to run away The OVP circuit is internally connected acr
4. to the J1 8 return In A the 10 Volt programming mode the impedance _ is twenty kilohms If the J1 10 input is discon Bin 13 1 8 lt o to 10 V Programming Source nected the ESS output will drop to zero amps In this configuration the front panel current knob is disabled However the voltage knob will still operate Typically the voltage knob is set fully clockwise to maximum to ensure the supply remains in current mode The voltage knob may be turned down to protect the load POS NEG La WIRING J1 PROGRAM CURRENT USING REMOTE CURRENT A user supplied variable current may be used to control the ESS output current The controlling current must be converted to a voltage by applying an external resistance The input at J1 10 has a ten megohm impedance the programming line is discon nected the ESS output will drop to zero amps To install this feature start with the basic wiring shown in Figure 5 Remove the jumper between J1 10 and J1 11 and add the circuit shown at right In this configuration the front panel current knob is disabled However the voltage knob will still oper ate Typically the voltage knob is set fully clockwise I to maximum to ensure the supply remains in cur Y rent mode The voltage knob may be turned down to protect the load The circuit may be modified for use with different conn currents and resistors Select them so that at maximum programming current the voltage across the resis
5. 0 1 96 of Full Current Output Current Load changes from Full to Short 12 6 3 Transient Load Response A voltage transient occurs when the load is changed The duration of the transient increases as the rated power supply output voltage increases ES Specification Test Condition Less than Less than Load changes 3096 20V 650 uSec Supply in constant current mode More than gom 20 Load changes 3096 21V uSec Supply in constant current mode Document 83 510 004 Rev C Specifications 12 5 12 6 4 Output Rise Time Rise time is determined by applying a zero to five volt step to the analog voltage program ming input As the output rises from zero to full rated voltage the time it takes the output to pass between the 10 to 90 Full Scale levels is measured The load is set to draw full volt age and at least 90 of full current Output Voltage 10 96 to 90 96 Risetime Range Risetime Levels 5to 120 Volt Less than 100 mSec From 10 to 90 FS 121 to 400 Volt Less than 200 mSec From 10 to 90 FS 401 to 600 Volt Less than 300 mSec From 10 96 to 90 FS 12 6 5 Propagation Delay When the analog programming input is stepped from 10 96 to 100 96 from 0 5 volts to 5 volts then the supply output voltage will begin to climb within 5 milliseconds This applies to both voltage programming and current programming Document 83 510 004 Rev C 126 Specifications 12 7 OUTPUT RIPPLE The following specifications are for the 70 kHz
6. NEG output voltage sense used by regulation circuit From NEG output bus bar Ground for J1 signals 1 mA source for ext resistor current programming 0 to 5 10 volt controls output current from zero to maximum To FP front panel current pot 0 to 5 Volts From internal shunt NEG side 0 to 100 mV typ current sense OPEN 1020to 5V GND PIN 10 0t0 10V Figure 3 Showing default jumper configuration VM Set IM Set V Prog V Amp In V Prog R VP Set V Rem V I Prog Amp IProgR 1 Rem V Rem V Sw Rem V Rtn OVP M S I Prog V Mon Mon M S Prog In M S Prog In WS OVP Out Option Enable supply output when 12 24 VDC or 24 48 VAC applied Isolated DC Source Return for enable supply output from pin 14 or 15 Cable from Master Over Volt output 12V in will inhibit supply Used in Slave supply Output wraps to I Amp In 0 to 5 volts Voltage monitor 0 to 5 10 volts as voltage goes 0 to max out Current monitor 0 to 5 10 volts as current goes 0 to max out Ground ref for pins 19 and 20 Tied to pin 8 Slave current control input from Master Neg reference Slave current control input from Master 0 to 5 volts Cable to Slave Over Volt input 12V out when supply in OV From internal shunt POS side connects to NEG output bus bar J1 Rear Panel Programming Connector Document 83 510 004 Rev C 5 5 1 Program t
7. approx carrier ripple that is the largest con tributor to the ripple in the output voltage For models not shown in this table use the next higher output Output Ripple ESS 2 5 KW 1 Phase Max Max see Note 1 Current Ripple below ESS 7 5 300 7 5 300 75 mV PARD ESS 10 250 10 250 75 mV PARD ESS 12 5 200 12 5 200 75 mV PARD ESS 20 125 20 125 80 mV PARD ESS 25 100 25 100 85 mV PARD ESS 30 80 30 80 100 mV PARD ESS 40 60 40 60 100 mV V pp ESS 60 40 60 40 100 mV Vpp ESS 80 30 80 30 100 mV Vpp ESS 100 25 100 25 150 mV V p p ESS 125 20 125 20 150 mV V p p ESS 150 16 150 16 150 mV V p p ESS 160 15 6 160 15 5 150 mV ESS 180 14 180 14 150 V pp ESS 200 12 5 200 12 5 170 mV V pp ESS 220 11 220 11 200 mV Vpp ESS 250 10 250 10 200 mV Vpp ESS 300 8 300 8 250 mV V p p ESS 400 6 400 6 300 mV V p p ESS 500 5 500 5 350 mV V p p ESS 600 4 600 4 400 mV V p p Note 1 PARD is Periodic and Random Deviation and includes all detectable noise peaks Vpp is Volts Peak to Peak and high speed switching spikes at approximately 70 KHz are omitted Table 7 Output Ripple ESS 2 5 KW 1 Phase Document 83 510 004 Rev C Specifications 12 7 12 8 MEASURING ACCURACY 12 8 1 Front Panel Meter Accuracy Digital Voltmeter 2 of full scale from Zero to Full Volt Rating Digital Ammeter 2 of full scale from Zero to Full Current Rating 12 8 2 An
8. 83 510 004 Rev C Series amp Parallel 10 3 10 2 PARALLEL OPERATION MASTER SLAVE The ESS has a special set of functions built into its programming plug so one Master Supply will accurately control up to three Slave supplies All four supplies will always have the same current output The interlock shut down feature may also be used so if any one supply detects a fault all the supplies will turn off together To use the Master Slave function all supplies must have the same maximum voltage and current rating In this configuration the Master current monitor output is cabled to a differential ampli fier in each Slave The amplifier output is then jumpered to the Slave s current pro gramming input The Master may be programmed in the voltage mode or the current mode It may be programmed locally front panel or remotely see Section 5 3 The Slaves will always follow equally When the Master Slave setup is complete the Slave s voltage knobs should be set clockwise to full voltage to ensure they stay in current mode The Slave s current knobs will be disabled Each supply should display the same voltage as is the voltage seen by the load but the current into the load is the SUM of all the currents Once they are adjusted the Master and Slaves may be switched OFF and ON in any sequence Master Slave 1 Slave 2 Slave 3 Part of J1 Part of J1 Part of J1 Part of J1 Figure 9 Parallel Master Slave Contro
9. Slave are at their maximum volt ages This voltage is fed into the Slave voltage programming input at J1 4 A simple way to select the resistors is to set the TOP resistor to 5 kilohms and use this formula to calculate the BOTTOM resistor 5 Kilohms Master Max Volt Slave Max Volt 5 Kilohms For example if a 100 volt Master is put in series with a 300 volt Slave then use 395 Kilohms and Reor 5 Kilohms 2 The Master may be set up for remote voltage programming Section 8 3 only if the programming source is differential fully isolated from ground and this source is ca pable of voltage offsets greater than the slave maximum voltage The IEEE RS232 programming option works with no restriction 3 Remote voltage sensing cannot be done with series supplies 4 f the voltage knob on the Slave is not fully up clockwise the Slave will output less voltage as the Master voltage is adjusted When the Master Slave setup is complete the Slave voltage and current knobs should be set full clockwise The voltage or current to the load can be regulated by adjusting the voltage and current knobs on the Master supply When the Master voltage changes the Slave voltage will follow Document 83 510 004 Rev C 10 6 Series amp Parallel 600 Volt USER Maximum LOAD CAUTION When using Master J1 connector All of its signals are referenced to the Master bus bar
10. Voltage Programming from Front Panel Knobs ofthe Negative Output Terminal from Front Panel Knobs MB ev Il Yd d e on ds 8905550006906 Local Internal Voltage Sense Remote Interlock ofthe Positive Output Terminal Setto Enable Output Figure 5 Wiring J1 Basic Programming Plug Document 83 510 004 RevC 8 2 J1 Wiring Diagrams USER LOAD Fully Loaded J1 Programming Plu This is an actual example showing how Analog Programming Output Monitoring Remote Sensing Interlock Switch and Parallel Master Slave may be used in one supply Current Voltage Programming Programming To Supply Apply Apply Power Remote 0 to 5 Volts 0 to 5 Volts Output Voltage Sense s 24 To gt Parallel Slave Supply Programming and Monitoring scale may be changed to to 10 volts by connecting any combination of pins 1 2 6 and 13 to ground Ground is pin 8 or 21 Interlock Switch Current Voltage Orente nii Monitoring Monitoring 5 Supply Measure Measure 0 to 5 Volts 0 to 5 Volts Figure 6 Wiring J1 Fully Loaded Programming Plug Document 83 510 004 Rev C 8 2 8 3 J1 Wiring Diagrams 8 3 WIRING J1 PROGRAM VOLTAGE USING REMOTE RESISTANCE A user supplied resistance from 0 to 5 Kilohms can be used to program the ESS output from zero to maximum voltage The programming is done by applying a 0 to 5 volt con trol signal to J1 4 The 1 milliamp constant curr
11. be grounded For special ap plications such as higher voltage enable signals call Lambda EMI Customer Service On supplies with more than 290 volts output if the positive output is tied to chassis ground then the Enable signal to J1 15 AND J1 16 MUST BE SUPPLIED by a source that is isolated from the AC power mains Document 83 510 004 Rev C 7 4 7 5 7 6 7 7 Protective Shutdown OVER TEMPERATURE SHUTDOWN At higher power levels the power switches inside the ESS will get hot A thermal switch will cause an Over Temperature Shutdown if they get hotter than 185 F 85 C If a over temperature shutdown occurs the ESS output will go to zero volts The front panel will not indicate an error The cooling fan will continue to blow When the heatsink cools down sufficiently the ESS will automatically return to its programmed output level If a shutdown due to over temperature occurs look for these corrective actions e Verify there is sufficient cool air circulating in the rack in which the ESS is installed e Check if the heatsink is clogged with dust Gently blow air through the ESS vents LOW LINE AC POWER SHUTDOWN Problems with the AC power line include normal brownout conditions where the input drops below what is required by the ESS When the power input gets too low the ESS will perform a Low Line Shutdown If a low line shutdown occurs the ESS output will go to zero volts The front panel will not indica
12. following features possible e Remote Voltage Sensing See Section 9 e Remote Programming via voltage current or resistance See Section 5 3 e Output Monitor signals for output voltage or current See Section 6 2 e External Enable and Inhibit See Section 7 3 7 4 The ESS is shipped with the default programming plug It is made from a standard DB 25 connector with male pins a backshell and four wires Its wiring is configured for local programming and sensing see Section 5 2 The connector and backshell are made of plastic to reduce the chance of arcing in high voltage power supplies If a supply has more than 290 volts output and if its POS bus bar is connected to Chassis Ground then the J1 plug backshell must NOT be conductive Using a metallic backshell under these conditions may cause electrical arcing from the pins to the backshell Some guidelines on constructing a custom J1 Programming Plug e Recommended to use 26 AWG wire with 300 Volt insulation e There may be a need to daisy chain two wires into one pin One method is to crimp or solder wire stubs into the pins and then make a splice at the ends of the stubs Insulate the splice e Passive components such as resistors capacitors and diodes may be inserted into the backshell for the purpose of scaling filtering and protecting Document 83 510 004 Rev C 3 4 3 6 Installation A Proper ESD precautions must be taken when taking off the c
13. rating is marked on the rear terminal of the power supply The rating is also part of the units model number as shown in Table 1 The Protective Earth Ground must be connected before applying Line Power to the ESS Document 83 510 004 RevC 3 2 3 4 Installation CONNECTING THE LOAD The load cables between the ESS outputs and the load must be robust The terminal connections must be secured tightly Failure to meet these requirements could cause substantial voltage losses terminal over heating and insulation degradation 3 4 1 Low Voltage Models For power supplies with LESS than 101 volts output rating the POS and NEG bus bars have single holes for bolting the load cables e Hole Diameter 0 41 Inches 10 3 mm e Bolt Size 3 8 Inch 10 mm A clear Lexan terminal cover is provided To attach it loosen three chassis screws slide the cover behind them then tighten the screws There are large holes are in the sides of the cover so the cable bolts may be accessed with a socket wrench 3 4 2 High Voltage Models For power supplies with MORE than 101 volts output rating the POS and NEG outputs are threaded studs A nut is used to attach the load cables e Stud Thread SAE 1 4 20 NC e Stud Length 1 Inch Long 25mm e Torque 40 Inch Pounds A clear Lexan terminal cover is provided To attach it loosen three chassis screws slide the cover behind them then tighten the screws 3 4 3 Load Connectio
14. 4 4 Test Procedure 1 Test Condition 1 3 3 1 25 Gpk half sine 11 msec 65 dBA max at 3 5 feet from front panel Document 83 510 004 Rev C Specifications 12 3 12 4 INPUT POWER 12 4 1 Required AC Power Input This table shows the maximum input current at a given output power phase and input volt age Input Supply Nominal Maximum Maximum Power Model Output Power Line Input Line Input Input Current Factor 16 16 15 2 5 KWatt 220 230 190 253 VAC 24 Amp AC 0 6 50 60 Hz 47 63 Hz 12 4 2 AC Inrush Current Soft start is standard on all ESS models Input line current during turn on turn off power inter ruption or power reapplication is less than that at full load 12 4 3 Overall Efficiency Units with higher output voltages have higher efficiency Efficiency is measured at nominal AC input line voltage and greater than 90 load maximum current and maximum voltage Max Output MORE than 11 Volts Efficiency greater than 85 Max Output LESS than 11 Volts Efficiency greater than 77 96 12 5 PROGRAMMING STATIC ACCURACY 12 5 1 Temperature Derating Every programming accuracy is derated by 0 02 of full scale voltage or current per degree Celsius above 25 C 12 5 2 Analog Programming Accuracy This refers to remotely programming the output voltage or current by means of an external DC voltage source to the J1 Programming connector For a given programming voltage at 25 the output accuracy is Progr
15. AC INPUT VOLTAGE STANDARD OPTIONS Output Digital Meters Lock Bushings Power Terminal Cover IEEE RS232 3 p 190 gt VAC Units Comply With rogramming 50 60 Hz 15 1 Phase CE Requirements Other Options Table 1 Model Number Format Input Suffix Document 83 510 004 RevC Inspection 2 1 2 OUT OF BOX INSPECTION 2 1 2 2 2 3 2 4 VISUAL INSPECTION Prior to shipment this instrument was inspected and found to be free of mechanical and electrical defects As soon as the unit is unpacked inspect for any damage that may have occurred in transit Verify the following A Check the operation of the front panel controls knobs should rotate smoothly Verify that the circuit breaker latches in the ON and OFF positions C Confirm that there are no dents or scratches on the panel surfaces D Check front panel meters and LEDs for any broken or cracked lenses If any damage is found follow the instructions in Section 2 3 and in the Returning Equipment instructions in the preamble section of this manual ELECTRICAL INSPECTION Before the ESS is installed in a system verify that no internal damage occurred during shipping A simple preliminary electrical test should be performed This test is described in Section 11 It takes only a few minutes and the only required equipment is a power cord and a piece of cable used to short circuit the ESS output If any inconsistency from the abo
16. Ambient temperature is 72 F 22 C e Unit operating at 90 power or greater e Load is purely resistive Ripple programming speed transient response and stability are optimized with the power supply configured this way 12 14 DECLARATION OF CONFORMITY 12 1 1 12 1 2 12 1 3 Compliance Units with the IEEE RS232 option AND whose output are greater than 401 volts ARE NOT CE CERTIFIED Safety Meets IEC 950 UL 1950 EN 60950 Hazardous Secon dary for outputs up to 600 volts single phase 230 VAC 2 5 KW output and for IEEE units up to 400 volts Input Disconnect Method Circuit Breaker Over temperature Protection Unit shall shut down when internal temperature exceeds safe operating levels CE Leakage Current 3 5mA Standard UL1950 EN60950 CE ESD Immunity EN 61000 4 2 IEC 801 2 Contact 4KV Air 8KV CE Radiated Immunity EN 61000 4 3 IEC 1000 4 3 CE Conducted Immunity EN 61000 4 6 IEC 1000 4 6 CE Power Freq Mag Field EN 61000 4 8 CE EFT Burst Immunity EN 61000 4 4 IEC 1000 4 4 CE Surge Immunity EN 61000 4 5 IEC 1000 4 5 CE Emissions EN 55011 Group 1 Class A 230VAC Input Conducted amp Radiated NT il mi 1 1 p p 2 NOTE CE to supplies with CE Certification EMC Requirements Units with CE suffix are tested to the EMC requirements of EN 50081 2 and EN 50082 2 In the presence of high ambient electrical noise shielding may be required on the
17. Dotted lines are the default LOCAL mode es see 0 8866666860890 9908900090460 Document 83 510 004 Rev C Notes Document 83 510 004 Rev C
18. Ground is at J1 21 J1 8 E The J1 20 monitor output is NOT floating It is always referenced to the NEG bus bar which is Pin2 Open 0to 5V Measurement connected to J1 21 and J1 8 Pin2 to 21 0 to 10 V Measurement 6 2 3 Measuring Output Voltage Using J18 J18 is the two pin connector on the ESS back panel The voltage at the POS bus bar is passed directly to J18 1 Pin 1 is the one closest to the J1 connector The output may be measured from this point if it is easier than connecting directly to the bus bar The volt age is with respect to the NEG bus bar J1 21 or J1 8 6 2 4 Measuring Output Current Using J1 The ESS has an internal shunt resistor which is used to measure the actual output cur rent through the NEG bus bar The signal at both ends of the shunt are passed to the J1 25 and J1 12 terminals J1 25 is connected to the NEG bus bar J1 12 is always a lower negative voltage The signals from J1 12 and J1 25 should NOT be used in customer applications The outputs are for test purposes only The internal shunt is located upstream of the ESS output capacitors It has a large sawtooth waveform with a frequency of about 70 kilohertz and up to 400 millivolt peaks Because of the wave shape and high common mode noise external voltmeters tend to give incorrect readings To measure output current the customer may choose to measure across an external shunt resistor or use the current monitor output Section 6 2 2
19. OLTAGE 8 3 8 4 WIRING PROGRAM VOLTAGE USING REMOTE CURRENT 8 4 85 WIRING J1 PROGRAM CURRENT USING REMOTE RESISTANCE 8 4 8 6 WIRING PROGRAM CURRENT USING REMOTE VOLTAGE 8 5 8 7 WIRING PROGRAM CURRENT USING REMOTE CURRENT 8 5 9 REMOTE VOLTAGE SENSING 2 1 1 1 11 9 1 9 1 CONNECTING THE REMOTE VOLTAGE SENSE LINES 9 1 9 2 ACCURACY AND REMOTE 9 1 10 CONNECTING MULTIPLE 10 1 10 1 PARALLEL OPERATIQN en een en 10 1 10 2 PARALLEL OPERATION 10 3 10 3 SERIES 22 nieces ete e a ie mens 10 4 10 4 SERIES OPERATION 10 5 11 QUICK OPERATIONAL TEST esee 11 1 12 ESS SPECIFICATIONS cios 12 1 12 1 DECLARATION OF 12 1 12 2 PHYSICAL SPECIFICATIONS eee 12 2 12 3 ENVIRONMENTAL SPECIFICATIONS eee 12 2 12 4 INPUT POWET ai a be b Dres 12 3 12 5 PROGRAMMING STATIC 12 3 12 6 PROGRAMMING DYNAMIC 12 4 12 7 OUTPUT RIPPLE indc re ni Le 12 6 12 8 MEASURING
20. OPERATOR MANUAL FOR ESS 2 5 KW CE IEEE POWER SUPPLY Document 83 510 004 Rev C 405 Essex Road LAMBDA A Neptune NJ 07753 Tel 732 922 9300 Fax 732 922 9334 Web www lambda emi com Table of Contents 1 GENERAL INFORMATION eene 1 1 1 1 INTRODUCTION rn na 1 1 1 2 SAFETY PRECAUTIONS trt tte p eive tr E Hte gps 1 2 1 3 SCOPE OF THIS MANUA san teer ene teme ts 1 3 1 4 MODEL NUMBER 1 3 2 OUT OF BOX INSPECTION nnne nnn 2 1 2 1 VISUAL INSPECTION eccellente lo pests 2 1 2 2 ELECTRICAL 2 1 2 3 CONTACTING LAMBDA EMI CUSTOMER SERVICE 2 1 24 RETURNING DEFECTIVE UNITS eee 2 1 3 INSTALLATION E 3 1 3 1 19 INCH RACK MOUNTING eee 3 1 3 2 VENTILATION REQUIREMENTS eese 3 1 3 3 AC POWER ener 3 1 34 CONNECTING THE 3 2 3 5 INTRODUCING THE J1 PROGRAMMING 3 3 3 6 CONNECTING THE IEEE RS232 3 4 4 CONTROLS INDICATORS CONNECTORS eee 4 1 4 1 FRONT PANEL 1 4 1 4 2 BACK PANEL LAYOUT teinte tele HR 4 2 4 3 J1 CONNECTOR PIN 4 4 5 PROGRAMMING THE OUTPUT
21. Remote Inhibit With Multiple Supplies Master Slave 1 Slave 2 Slave 3 e T NC os Supply ON Switch gt Supply OFF Document 83 510 004 Rev C 7 4 Protective Shutdown 7 3 The interlock feature described above for a single supply may also be used with multi ple supplies The supplies may be connected in parallel they may be programmed as Master and Slaves or they may also be entirely independent In any configuration when the switch is opened all supplies will shut down simultaneously REMOTE ENABLE USING J1 DC AND AC The ESS output may be turned ON and OFF by applying and removing and external voltage source between J1 14 and J1 15 The voltage source may be 121024 Volts DC or 5 e 241048 Volts AC 60 Hz or faster In the DC mode pin J1 14 must be POS and J1 15 is NEG The input impedance is 4 5 kilohms so at 24 volts the required current is 6 milliamps Part of J1 DC Source AC Source 12 to 24 2410 48 Y i Vz Supply ON 5 9 No Connect o i Select DC OR AC If the external voltage source is removed OPENED or SHORTED the ESS output will go to zero volts The front panel will not indicate an error When the source energizes again the ESS will automatically return to its programmed output level When using J1 14 and J1 15 remote inhibit pin J1 16 must NOT be used J1 14 and J1 15 are isolated inputs Neither pin needs to
22. Remote Voltage Sensing Diagram Document 83 510 004 Rev C Series amp Parallel 10 1 10 CONNECTING MULTIPLE SUPPLIES 10 1 PARALLEL OPERATION When the customer requires more current than can be delivered by one power supply up to four supplies may be paralleled In this configuration all the ESS positive outputs are connected to the load positive input and all the ESS negative outputs are connected to the load negative input With parallel supplies the voltage to the load is what is displayed by each supply but the current into the load is the sum of the currents from each supply With parallel supplies all supplies must have the same Maximum Voltage Rating If a low voltage supply is subjected to higher voltage from another supply the lower volt age supply may be damaged 10 1 1 Parallel Operation Local Mode In the Local configuration each supply is separately adjusted by using its front panel voltage and current knobs When first setting up parallel supplies make sure all the knobs are turned counter clockwise to zero Slowly turn the knobs upward You will see the supplies switching between voltage mode and current mode as each supply pro vides more or less current than its partners Once they are adjusted the supplies may be switched OFF and ON in any sequence In applications where it is difficult to adjust all the supplies it is recommended that the Master Slave configuration is used This is described in the n
23. aker Open Contact External Inhibit e AC or DC External Enable Soft Start to Reduce AC Inrush Internal discharge resistors on AC Input and Output terminals Zero Stacking in mounting rack Top and Bottom covers have no openings Air Cooled Fan Driven in front out rear Optional IEEE 488 and RS 232 Digital Interface Document 83 510 004 Rev C 1 1 NOTE This manual contains information instructions and diagrams which apply to standard constructions If special features or modifications have been installed the instructions specific to that modification are contained in Addenda and take prece dence if conflicts exist Please take care to refer to the correct information for your unit 1 2 1 2 Introduction SAFETY PRECAUTIONS All ESS power supplies are designed to minimize the risk of fire or shock hazard This instrument received comprehensive mechanical and electrical inspection prior to shipment Nevertheless certain safety pre cautions must be observed Only TECHNICALLY QUALIFIED SERVICE PERSONNEL familiar with the principles of electrical safety should operate this supply The power sup SHOULD NOT BE EXPOSED TO WATER OR MOISTURE OR DUSTY ENVIRONMENTS Electrical safety must be maintained at all times Lethal voltages are developed within the power supply s enclosure Therefore the cover may not be removed by the user see Warrantee in preamble section for variance Also the large capacitors in the supply m
24. alog Measuring Accuracy This refers to the accuracy of the monitor signals from the J1 Programming connector The monitor signals vary from O to 5 volts 10 volts selectable as the output voltage and current vary from zero to full rating For a given output the monitor accuracy is Monitor Monitor Mode F ll Scale Monitor Accuracy Voltage Monitor 0 to 5 Vdc 196 or 0 05 Volts Voltage Monitor 0 to 10 Vde 196 or 0 10 Volts Current Monitor 0 to 5 Vdc 196 or 0 05 Volts Current Monitor 0 to 10 Vdc 196 or 0 10 Volts 12 8 3 Optional Digital Measurement Accuracy When the IEEE RS232 Interface option is installed the accuracy of a Measure Voltage or Measure Current command is Measurement Accuracy Voltage 0 5 96 of Full Output Voltage Current 0 5 96 of Full Output Current The analog to digital converters ADC are 12 bits resolution Measurement filtering AFV and AFC commands set to default 20 readings 12 9 OVER VOLTAGE PROTECTION 12 9 1 Front Panel OV Potentiometer Adjustment Range 5 to 110 Max Output Voltage Response Time Less than 3 mSec if output exceeds OVP setting by 196 of full scale 12 9 2 Optional Digital Over Voltage and Over Current Adjustment Range Zero to Max Output Voltage or Current Response Time Output shut down in less than 20 mSec if output exceeds voltage or current setting by 196 of full scale Document 83 510 004 Rev C Notes Sketch Your Own Programming Plug
25. amming Output Mode Full Scale Output Accuracy Voltage Mode 0 to 5 Vdc 1 of Full Output Voltage Voltage Mode 0 to 10 1 96 of Full Output Voltage Current Mode 0 to 5 Vdc 1 96 of Full Output Current Current Mode 0 to 10 Vdc 1 96 of Full Output Current 12 5 3 Stability After a 60 minute warm up maximum deviation in either voltage or current mode for an eight 8 hour period is 0 05 of maximum output under conditions of constant line load and temperature Document 83 510 004 Rev C 12 4 Specifications 12 5 4 Optional Digital Programming Accuracy When the IEEE RS232 Interface option is installed the accuracy of a Program Voltage or Program Current command is Output Mode Output Accuracy Voltage Mode 0 5 96 of Full Output Voltage Current Mode 0 5 of Full Output Current The digital to analog converters DAC are 12 bits resolution 12 6 PROGRAMMING DYNAMIC RESPONSE 12 6 1 Line Regulation The supply output should not change as the input AC Line voltage varies Mode Specification Test Condition Voltage 0 1 96 of Full Input varies over its Output Voltage Required Power Input Current 0 1 96 of Full Input varies over its Output Current Required AC Power Input 12 6 2 Load Regulation The supply output should not change as the load on its output varies Mode Specification Test Condition 0 1 96 of Full Voltage Output Voltage Load changes from Full to Open
26. ator from electrical shock and protect the supply from envi ronmental contamination Never install the ESS so its weight is supported only by the front panel screws The ESS must never be installed so there is no support in the back This arrangement can cause the front panel plate to be permanently distorted Therefore the ESS must be mounted on chassis slides or on a shelf inside the rack VENTILATION REQUIREMENTS This instrument is fan cooled Sufficient space must be allocated so that a free flow of cooling air can reach the front back and sides of the instrument when it is in operation Insure these clearances are met for adequate air flow e 4inches 10 cm front and rear and e 2inches 5 cm on each side Air enters through the front and side panels It is forced out the rear panel See the Out line Drawing at the end of this manual This power supply should not be operated with its cover removed since the cover directs the flow from the internal fan AC POWER CONNECTION The customer s AC line connects to the ESS through a terminal strip It has four SAE 8 screws Only use a power cable with the correct voltage and current ratings The rec ommended wire gauge is listed in this table The ground wire must be equal to or larger than the recommended gauge Output Power Frequency Input voltage Max Input Cur Recommended Wire Watt Hz Vrms rent Arms AWG mm 190 253 Table 2 Input Power The AC input
27. ay store power even after the line power is removed ALLOW AT LEAST 40 SECONDS DISCHARGE TIME between removing the line power and opening the cover ALSO ALLOW AT LEAST 40 SECONDS between switching the AC power off and switching it on again Dangers are inherent in high voltage equipment However power supplies with LOW VOLTAGE OUTPUTS ARE ALSO POTENTIALLY DANGEROUS Beyond the steady state energy available supply outputs have very large capacitors which can deliver huge surge currents capable of vaporizing metallic objects such as screwdrivers or jew elry This could result in molten metal being sprayed Proper care and judgment must al ways be observed Ensure all covers are in place and securely fastened before switching ON the AC power Ensure the Programming Plug is attached Proper grounding from the input AC power is required to reduce the risk of electric shock Ensure that the AC Protective Earth Ground third prong connection has at least the same gauge wire as the supply leads shown in Table 2 Where high leakage exists and there is a warning label on the rear panel the Protective Earth Ground must be connected Symbol for protective earth ground Use extreme caution when connecting input AC power and never apply the incorrect in put voltage refer to ratings label Use extreme caution when connecting the high voltage output cables to the load Ensure all load capacitors are completely discharged prior to connection N
28. ber when supply is in the voltage mode constant voltage operation Glows red when shutdown has occurred be cause output exceeded the OV trip level Glows amber when supply is in the current mode constant current operation Displays output current of power supply 3 5 digits fixed decimal point LED display Protective extends further than knobs Adjusts the output voltage from zero to full Ten turn potentiometer Sets Over Voltage trip level Single turn Recessed slotted potentiometer shaft Adjusts the output current from zero to full Ten turn potentiometer Located in front back and sides Front Panel Controls and Indicators o N al al _ N al o 4 1 4 2 4 2 Outline Diagrams BACK PANEL LAYOUT POS Output Stud Refer to Figure 2 on Next Page DESCRIPTION NEG Bus Bar POS Bus Bar IEEE 488 Connector RS 232 Connector IEEE Address J18 Connector J1 Connector Terminal Cover Chassis Stud AC Line Input NEG Output Stud Table 5 SEE Negative output on lower voltage models 3 41 Is ground reference for J1 Prog Plug signals Positive output on lower voltage models 3 4 1 Digital programming option Standard 24 pin IEEE 488 connector gt Digital programming option Standard female DB 9 connector gt Digital programming option Six position DIP switc
29. ding front panel knob will not operate However the front panel Over Voltage Potentiometer will always limit the output voltage The VOLT and CURRENT LEDs will always show the operating mode of the power supply The remote source of the programming voltage can be generated in a variety of ways Any 0 to 5 volt 10 volt selectable source is acceptable Some J1 Programming Plug wiring configurations are shown in detail They are listed in this table Voltage Channel See Current Channel See Programming Section Programming Section Using Remote Resistance 8 2 Using Remote Resistance 8 5 Using Remote Voltage 8 3 Using Remote Voltage 8 6 Using Remote Current 8 4 Using Remote Current 8 7 If the J1 programming inputs are miswired the ESS output may go out of CONTROL Damage to the ESS and the user load could occur If the programming source such as a small power supply has its negative terminal tied to chassis ground the third prong in a power cord then the ESS negative Bus Bar will also be tied to chassis ground Document 83 510 004 Rev C 5 3 1 5 4 Program the Output 5 3 Analog Programming Guidelines There may be a small reduction in analog programming accuracy because the pro grammer output impedance will divide with the ESS programming input impedance Make the programmer output impedance as low as possible The ESS programming input impedance pins J1 4 and J1 10 is e 10 Kilohms for 0
30. e basic wiring shown Current Source in Figure 5 Remove the jumper between J1 4 and J1 5 and add the circuit shown at right In this configuration the front panel voltage knob is dis abled However the current knob will still operate Typically the current knob is set fully clockwise to W maximum to ensure the supply remains in voltage I R is0to5V mode The current knob may be turned down to protect the load The circuit may be modified for use with different cur rents and resistors Select them so that at maximum programming current the voltage across the resistor 1 5 volts Higher Current Higher Output NO CONN WIRING J1 PROGRAM CURRENT USING REMOTE RESISTANCE A user supplied resistance from 0 to 5 Kilohms be used to program the ESS output from zero to maximum current The programming is done by applying a 0 to 5 volt con trol signal to J1 10 The 1 milliamp constant current source from J1 9 is routed to the remote potentiometer The current source will work for 5 volt programming only not for 10 volt so keep J1 13 disconnected To install this feature start with the basic wiring shown in Remote Figure 5 Remove the jumper between J1 10 and J1 11 and Programming add the circuit shown at right Potentiometer In this configuration the front panel current knob is disabled 5 However the voltage knob will still operate Typically the Lower Output Current voltage knob is set fully clockwise to max
31. ent source from J1 3 is routed to the re mote potentiometer The current source will work for 5 volt programming only not 10 volt so keep J1 6 disconnected To install this feature start with the basic wiring shown in Emm Figure 5 Remove the jumper between J1 4 and J1 5 and Potentiometer add the circuit shown at right In this configuration the front panel voltage knob is dis abled However the current knob will still operate Typically the current knob is set fully clockwise to maximum to en sure the supply remains in voltage mode The current knob may be turned down to protect the load There is an internal ten megohm pull down resistor at the J1 4 input If the J1 4 programming line is disconnected the ESS output will slowly drop to zero volts The output of the supply may also be set to a fixed voltage by using a fixed resistor which is calculated from Lower Output 5 Kilohm only NO CONN Resistance Desired Voltage Maximum Output Voltage X 5 kilohms The current source from J1 3 is nominally 1 milliamp but may vary 0 01 milliamp WIRING J1 PROGRAM VOLTAGE USING REMOTE VOLTAGE The ESS output voltage can be remotely programmed by applying a 0 to 5 or 10 volt control signal to J1 4 As the control voltage increases the ESS output voltage will in crease The control NEG lead must always go to J1 8 which is internally tied to the negative bus bar output To install this feature start with
32. ever handle the output cable when the power supply is operating Never attempt to operate the power supply in any manner not described in this manual Never remove DANGER and WARNING labels from the power supply Replace lost or damaged labels immediately The power supply should only be serviced by Lambda EMI factory authorized personnel Document 83 510 004 Rev C Introduction 1 3 1 3 SCOPE OF THIS MANUAL This manual is used for installing and operating the ESS 2 5 KW Power Supply Suggestions and requirements for connecting AC power load cables and signal cables are given Various operating modes and programming modes are described Although the Digital Programming IEEE 488 and RS 232 option is mentioned here for a complete description of the programming language see Lambda EMI document User Manual For Embedded IEEE Option document number 83 468 007 1 4 MODEL NUMBER FORMAT The model numbering system for the ESS power supply includes symbols for features and options They are separated by dashes Examples are ESS 100 25 15 D TC CE and ESS 600 4 15 D TC CE IEEE 0950 Table 1 is a partial listing of the model number format for the ESS Power Supply family For additional options the customer may contact the Sales Department at Lambda EMI Special options are typically shown as a four digit suffix to the model number ESS Voltage Current Input D TC CE Options DC Voltage Range DC Current Range
33. ext section 10 1 2 Fault Protection for Parallel Supplies In parallel operation the Over Voltage Protection OVP must be DISABLED in the supplies OR the cable connections described here must be implemented In all ESS supplies there is a Crowbar Fast Discharge resistor that connects between the output bus bars when an over voltage shutdown occurs This resistor is NOT rated for continuous operation If a paralleled supply goes into OVP shutdown the power from the still running supplies will burn out the resistor Therefore disable the OVP in every supply by turning their front panel OVP pots up fully clockwise Alternately there is a Master Slave Fault Detection feature that is available through the J1 programming plug Construct a cable that connects e Daisy chain all J1 17 pins from each supply together e And daisy chain all J1 24 pins from each supply together If one supply shuts down because of over voltage over temperature or low line then all the supplies will shut down simultaneously Document 83 510 004 Rev C 10 2 Series amp Parallel POS Terminal Block 5 USER MASTER 9 LOAD a Ned Terminal Block POS REMOTE SENSING done by running cable SLAVE 1 NEG from Master J18 to ESS LP Load terminals J1 E SLAVE 2 NEG ESS Lr J1 8 SLAVE 3 NEG ESS CP M Dashed line is optional signal cable for Master Slave operation Figure 8 Connecting Parallel Supplies Document
34. h for IEEE programming Positive output sense header two terminals Allows Local or Remote voltage sense c Analog programming connector Standard female DB 25 connector Co Clear Lexan protective cover Closed top and sides Ground connection for AC Line functional ground Accepts SAE 10 32 nut Terminal strip with safety barriers Connects AC Power line Two phases plus neutral 2 Negative output on higher voltage models Is ground reference for J1 Prog Plug signals SONO Positive output on higher voltage models 3 4 2 Back Panel Controls and Connectors Document 83 510 004 Rev C Outline Diagrams 4 3 Low Voltage Models with outputs LESS than 101 Volts Shown with optional Digital Interface Board Otherwise blank panel High Voltage Models with outputs MORE than 101 Volts Figure 2 Back Panel Controls and Connectors Document 83 510 004 RevC 4 4 Outline Diagrams 4 3 J1 CONNECTOR PIN DIAGRAM This is a summary of the signals at the J1 Analog Programming connector For connector assembly overview see Section 3 5 Analog Connector J1 Pin Description OPEN PIN 192 0to 5V GND PIN 19 2 0 to10V OPEN PIN 20 0 5V GND PIN 20 0 to10V 1 mA source for ext resistor voltage programming 0 to 5 10 volt controls output voltage from zero to maximum To FP front panel voltage pot 0 to 5 Volts PIN4 0to 5V GND PIN4 0to 10V
35. he Output 5 1 PROGRAMMING THE OUTPUT VOLTAGE MODE AND CURRENT MODE The voltage and current controls set the boundary limits for the load voltage and current The relationship between the control settings and the load resistance determines whether the power supply operates in constant voltage or constant current mode Constant Voltage Mode When the load resistance is high enough the power supply cannot produce more cur rent without exceeding the supply s programmed voltage setting Therefore the supply will constantly adjust its output current so the voltage stays the same This is the Con stant Voltage Mode It is also known as operating in the Voltage Mode The front panel VOLTAGE LED illuminates when the ESS is in this mode Constant Current Mode When the load resistance is low enough the power supply cannot produce more voltage without exceeding the supply s programmed current setting Therefore the supply will constantly adjust its output voltage so the current stays the same This is the Constant Current Mode It is also known as operating in the Current Mode The front panel CURRENT LED illuminates when the ESS is in this mode Crossover Point The ESS will perform a programming mode crossover when there is a change in pro grammed voltage programmed current or load resistance The crossover point is de termined by Ohm s law The power supply will exit constant voltage and enter constant current when the load resistance reduces suff
36. he supply The VOLTAGE LED indicator will il luminate F Rotate the Over Voltage Potentiometer OVP down counter clockwise Within a quar ter turn the output voltage will drop to zero volts The front panel OVER VOLTAGE LED indicator will illuminate G Switch the ESS power OFF Rotate Voltage and Current knobs completely coun ter clockwise downward Rotate the Over Voltage Pot fully clockwise upward H Connect a shorting cable across the output bus bars of the supply Make sure that the cable can sustain the maximum output current of the supply Refer to Table 3 for recommended wire size l Flip ON the ESS circuit breaker The internal fans will start immediately After a few seconds delay the power supply will turn on J Rotate the voltage knob up one turn clockwise The output voltage and current will remain close to zero K Rotate the current knob fully clockwise upward The front panel ammeter will display the maximum output current of the supply The CURRENT LED indicator will illumi nate L Rotate current knob completely counter clockwise to zero Turn OFF the ESS circuit breaker If any inconsistency from the above test procedure is noted call Lambda EMI Customer Service for assistance Document 83 510 004 Rev C Specifications 12 1 12 ESS SPECIFICATIONS All performance specifications unless otherwise stated are defined with the ESS operating in these conditions Local programming mode e
37. iciently or when the programmed voltage increases sufficiently The power supply will exit constant current and enter constant voltage when the load resistance increases sufficiently or when the programmed voltage decreases suffi ciently Open Circuit Load Pt Vmax Vset Voltage Mode Line Crossover Point Current Mode Line Short Circuit Load Pt Rcrossover Rers Vset lset Figure 4 Voltage and Current Mode Crossover Document 83 510 004 Rev C 5 2 5 2 5 3 Program the Output LOCAL PROGRAMMING USING FRONT PANEL KNOBS The ESS signals that control the output voltage and current enter at the backpanel J1 connector at pins 4 and 10 In LOCAL programming the control voltages come directly from the front panel voltage and current potentiometers which are each 5 kilohms The routing is shown in Figure 3 The potentiometers are each energized by a precision con stant voltage source that is not accessible to the user ANALOG PROGRAMMING USING THE J1 CONNECTOR The J1 Programming Plug can be modified by the user for remote Analog Programming This configuration moves the programming from the front panel knobs to the user s re mote programming source The remote source may deliver any signal from 0 to 5 volts DC 10 volts selectable This feature may be used along with Remote Voltage Sensing described in Section 9 If an external Programming Plug is wired for remote voltage or current programming the correspon
38. imum to ensure the supply remains in current mode The voltage knob may be turned down to protect the load There is an internal ten megohm pull down resistor at the J1 10 input If the J1 10 programming line is disconnected the ESS output will drop to zero amps The output of the supply may also be set to a fixed current by using a fixed resistor which is calculated from 5 Kilohm NO CONN Resistance Desired Current Maximum Output Current X 5 kilohms The current source from J1 9 is nominally 1 milliamp but may vary by 0 01 milliamp Document 83 510 004 Rev C 8 6 8 7 J1 Wiring Diagrams 8 5 WIRING J1 PROGRAM CURRENT USING REMOTE VOLTAGE The ESS output current can be remotely programmed by applying a 0 to 5 or 10 volt control signal to J1 10 As the control voltage increases the ESS output current will in crease The control NEG lead must always go to J1 8 which is internally tied to the negative bus bar output To install this feature start with the basic wiring shown in Figure 5 Remove the jumper between Programming Source J1 10 and J1 11 and add the circuit shown The maximum voltage at J1 10 is either 5 volts Oto 5 Vor Higher Voltage or 10 volts If J1 13 is left open the ESS is in 0 9 the 5 volt programming mode If J1 13 is grounded to J1 8 or to J1 21 it is in the 10 volt mode In the 5 volt programming mode the J1 10 input 0 8 impedance is ten
39. k Panel Controls and Connectors 4 2 Output Measurement Schemes Using Jl 6 1 Output Ripple ESS 2 5 KW 1 Phase 12 6 1 1 1 Introduction GENERAL INFORMATION INTRODUCTION The ESS 2 5 KW CE IEEE Power Supply manufactured by Lambda EMI of Neptune NJ is a compact high performance device It has numerous features that have been de veloped specifically for manufacturing laboratory test and burn in applications It will drive a load with up to 2 5 Kilowatts of DC power and it is 32 inches tall in a 19 inch rack Standard features include Output Voltage and Current Adjustable From Zero to Full Output Constant Voltage Regulation e Constant Current Regulation Voltage Control Knob 10 Turn e Current Control Knob 10 Turn Output Voltage LED 3 Digits e Output Current LED 3 Digits Settable Over Voltage Protection with Crowbar Isolated Power Outputs Series Supply Operation e Parallel Supply Operation Remote Sensing of Voltage at Load Remote Programming of Voltage by External Voltage Current or Resis tance Remote Programming of Current by External Voltage Current or Resistance Remote Programming is User Selectable for 5V or 10V Full Scale Voltage Monitor e Current Monitor Monitors are User Selectable 5V or 10V Full Scale Low AC Input Shutdown e High Temperature Shutdown Four Mode Indicating LEDs e Front Panel AC Circuit Bre
40. l Cable Document 83 510 004 Rev C 10 4 Series amp Parallel 10 3 SERIES OPERATION When the customer requires a regulated voltage that is higher than can be delivered from one power supply two supplies may be connected in series This configuration connects the negative output terminal of one to the positive output terminal of the other When supplies are connected in series the current to the load is what is displayed by either supply but the voltage to the load is the sum of the voltages from each supply With series supplies all supplies must have the same Maximum Current Rating If a low current supply is subjected to higher current from another supply the lower cur rent supply may be damaged In the Local configuration each supply is separately adjusted by using its front panel voltage and current knobs When first setting up the supplies make sure all the knobs are turned counter clockwise to zero Slowly turn the knobs upward You will see the supplies switching between voltage mode and current mode as each supply provides more or less current than its partner For applications where it is difficult to adjust all the supplies it is recommended that the Master Slave configuration is used This is described in the next Section The combined output may NOT exceed 600 volts with respect to chassis ground of either supply When pair of supplies is connected in series the top supply s J1 Programming con necto
41. load the remote sensing cables and programming cables To meet EMC specifications it may be necessary to maximize the separation between the load cables and the AC power cables Electrical Safety Meets UL 1950 Standards Meets Overvoltage Category Il per IEC 664 Document 83 510 004 RevC 12 2 Specifications 12 2 PHYSICAL SPECIFICATIONS 12 2 1 Physical Size See Outline Drawing Height 3 34 Inches 84 8 mm Width 19 0 Inches 483 mm Depth 17 8 Inches 452 12 2 2 Shipping Size Packing Size Length 27 69 cm Width 25 Inches 64 cm Height 11 Inches 28 cm Weight 37 Ibs 17 kg 12 3 ENVIRONMENTAL SPECIFICATIONS 12 3 1 Operating Environment Operating Temperature Operating Humidity Altitude 0 C to 50 C without derating 50 C to 70 C with derating see 12 3 2 20 to 80 RH non condensing 10 000 ft ESS meets UL 1950 Pollution Degree 2 Standard Unit is NOT sealed Conductive dust and moisture WILL cause damage Proper precautions and maintenance required 12 3 2 Temperature Derating 50 C to 70 C Output Current Coefficient 12 3 3 Storage Environment Storage Temperature Storage Humidity Altitude 12 3 4 Shock and Vibration Vibration Unpackaged Shock Audible Noise Unpackaged 4 per C of the rated output voltage Derate linearly from 50 C to 70 C 40 C to 85 C 20 to 95 RH non condensing 10 000 ft MIL STD 810E Method 51
42. n Guidelines General guidelines for connecting a load are as follows e Each pair of cables should be as short as possible e On high output current units connections should be properly torqued See the bolt manufacturer s specification e A chassis stud is located near the output terminals so a short jumper may be con nected between an output bus bar and chassis ground The system should NOT be grounded at more than one point The stud size is SAE 10 32 The nut s maximum torque is 34 inch pounds e If the load cables are long they should be bundled together In areas of high electri cal noise they may have to be twisted together e Maximize the separation between the AC power lines and the load cables to reduce the radiated and conducted electromagnetic emissions Document 83 510 004 Rev C Installation 3 3 Typical cable sizes for load connections are shown below Use cables that meet re quirements for current voltage length temperature and termination CURRENT RECOMMENDED CURRENT RECOMMENDED Amps COPPER WIRE SIZE Amps COPPER WIRE SIZE 200 4 0 30 10 150 2 0 20 12 120 0 15 14 80 4 10 16 60 6 6 18 45 8 LESS 20 Table 3 Wire Sizes for Load Connection 3 5 INTRODUCING THE J1 PROGRAMMING PLUG The J1 connector on the back panel is the key to the ESS s versatility A programming plug must be installed on J1 to enable the power supply This programming plug may be rewired to make the
43. nternally connected to the backpanel J18 1 pin An external jumper loop connects this to J18 2 where the ESS control reads the output voltage Remote sensing is done by connecting a wire from the distant load to the J18 2 input The loop from J18 1 to J18 2 must be removed There is an internal 100 ohm resistor from J18 1 to J18 2 to maintain control if the sense wire is disconnected Negative Sense Lead The output NEG bus bar is internally connected to the backpanel J1 8 pin An external jumper loop connects this to J1 7 where the ESS control reads the output voltage Re mote sensing is done by connecting a wire from the distant load to the J1 7 input The loop from J1 7 to J1 8 must be removed There is an internal 100 ohm resistor from J1 8 to J1 7 to maintain control if the sense wire is disconnected ACCURACY AND REMOTE SENSING The sense lines should reach as close to the load as possible Supply output accuracy may be improved if the sense cables have equal length and gauge Noise picked up in the sense cable may reduce the output accuracy For normal applica tions use twisted pair wire For long cables in noisy environments use a shielded cable Terminate the shield only on one end to an ESS chassis screw or to the load chassis Document 83 510 004 Rev C 9 2 Remote Sensing USER LOAD CR1 Optional Protective Diode shown for inductive loads PRA o IIS NEG tp 260554565662 Figure 7
44. oss the output bus bars It is set by turning a front panel potentiometer The potentiometer has a recessed slotted shaft It is one turn from end to end When the OVP is rotated fully clockwise maximum the OVP trip point is approximately 12096 of full output voltage This is the factory default setting When the front panel OVP shaft is turned fully counter clockwise zero an OVP shutdown will occur as soon as the ESS is switched on How to Adjust the OVP Trip Level A Turn off the ESS power If load can be damaged by applying the maximum volt age wait 20 seconds for safe power drain and then disconnect the load from the ESS output bus bars B Rotate the front panel OVP full clockwise upward C Switch power ON Rotate front panel volt and current knobs until the ESS output voltage equals the level where you want the OVP to trip D Slowly rotate the front panel OVP counter clockwise downward E When the OVP has been turned down far enough the ESS will shut down At this moment the OVP trip level will be correctly set F TURN OFF THE ESS POWER TO RESET the over voltage condition Document 83 510 004 Rev C 7 2 7 2 2 7 2 3 7 3 7 3 1 Protective Shutdown Recovering From an OVP Shut Down When a shut down event occurs the ESS will inhibit is output This is equivalent to pro gramming the voltage and current to zero A front panel OVER VOLTAGE red LED will illuminate The only way to
45. over and making connection to J1 CONNECTING THE IEEE RS232 INTERFACE An embedded digital programming card is optional for the ESS The IEEE 488 RS 232 and Address Switch are accessible through openings in the back panel If this card is not installed a blank panel covers the openings For details on connector location and pin orientation see the Outline Drawing at the end of this manual For further details on the digital interface see Lambda EMI document User Manual For Embedded IEEE Option document number 83 468 007 A Proper ESD precautions must be taken when taking off the cover and making connection to RS 232 and IEEE connectors when used J1 Document 83 510 004 Rev C Outline Diagrams 4 CONTROLS INDICATORS CONNECTORS FRONT PANEL LAYOUT For more details see the Outline Drawing at the end of this manual 4 1 e Figure 1 LAMBIAA SS at A Cc Front Panel Controls and Indicators CO lt ESS POWER SUPPLY 5 REF DESCRIPTION NOTE SECTION Power Switch Voltmeter Power LED Voltage Mode LED Over Voltage LED Current Mode LED Ammeter Handles Voltage Control Over Volt Adjust Current Control Ventilation Holes Table 4 Document 83 510 004 RevC Power On circuit breaker Displays output voltage of power supply 3 5 digits fixed decimal point LED display Illuminates red when AC power switched ON Glows am
46. r and all of its signals are raised to a high offset voltage by the bottom supply Connecting a ground or a ground referenced voltage to the top J1 may damage the sup ply In a series configuration do NOT connect any J1 signals from one supply to the other The Over Voltage Protection feature will not protect the load from an overvoltage but no damage will be done to either power supply if one of them goes into a fault shutdown Once they are adjusted the supplies may be switched OFF and ON in any sequence Document 83 510 004 Rev C Series amp Parallel 10 5 10 4 SERIES OPERATION MASTER SLAVE The Local mode of series supplies described above may be sufficient for many applica tions However use the Master Slave configuration to get easier control and equal volt age sharing In this configuration the resistor divided voltage from the Master POS bus bar output is connected to the Slave s voltage programming input When the voltage is set on the Master s front panel knob the Slave s voltage output will automatically adjust equally The Slave s front panel current knob is typically set clockwise to maximum so the Slave stays in voltage mode These are some guidelines for constructing a Series Master Slave system 1 Use the wiring diagram shown in Figure 10 The output from the Master J18 1 is di vided by two user supplied resistors The divided voltage should be 5 volts with re spect to the Slave ground when the Master and
47. reset an OVP shut down is to switch the ESS power OFF It is important to find the cause of this event and correct it before switching the power back ON Crowbar Fast Discharge When an over voltage shutdown occurs an internal resistor will be switched between the output bus bars to discharge the ESS output and bring the output voltage to zero The value of the resistor varies with the supply s voltage rating but they are rated at 10 Watts and they can be damaged if they have to discharge a large load during an over voltage event REMOTE INHIBIT USING J1 OPEN CONTACT By default the ESS will remain shut down if the J1 Programming Plug is not attached The plug is sensed via a jumper between J1 15 and J1 16 This arrangement is very useful in customer applications for safety and process synchronizing Typically a cable from J1 15 and J1 16 is run to a remote switch The ESS will shut down if a door switch is opened a product traverses a sensor or an automation controler opens a switch If an open contact inhibits the supply its No Connect Supply OFF e output will go to zero volts The front A Supply ON panel will not indicate an error When the L contact closes again the ESS will auto matically return to its programmed output by COR level When using J1 15 and J1 16 remote enable pin J1 14 must NOT be used J1 15 is a 15 volt 1 amp isolated DC source Neither it nor J1 16 needs to be grounded
48. so what was typically ground is now at high voltage Figure 10 Series Master Slave Supplies Master J18 rr orar gt PR e ele c 9 Q6 60000650000 000800000999 d 558555 555566 69 9 9 69 69 69 69 9 Figure 11 Series Master Slave Control Cable Document 83 510 004 Rev C Quick Op Test 11 1 11 QUICK OPERATIONAL TEST Before the ESS is installed in a system verify that no internal damage occurred during shipping A simple preliminary electrical test should be performed as follows Many operating errors are caused by a miswired J1 Programming Plug For this test verify the plug is wired and installed for the default Local mode See Figure 3 for a diagram of the Local mode wiring A Rotate Voltage and Current knobs completely counter clockwise downward Rotate the Over Voltage Pot fully clockwise upward Make sure the power switch is off push down B Apply the correct AC line power to the ESS Refer to Section 3 3 for the power cord requirements C With no load connected to the output terminals flip ON the circuit breaker of the sup ply The internal fans will start immediately After a few seconds delay the power sup ply will turn on D Rotate the current knob up one turn clockwise The output voltage and current will remain close to zero E Rotate the voltage knob fully clockwise upward The front panel voltmeter will dis play the maximum output voltage of t
49. te an error The cooling fan will continue to blow When the AC input returns to normal the ESS will automatically return to its programmed output level THE IEEE RS232 PROTECTION OPTION The digital programming option provides user settable over voltage and over current monitoring and shutdown It also has settable programming limits and output inhibit commands See the Lambda EMI document User Manual For Embedded IEEE Op tion document number 83 468 007 for further details Document 83 510 004 Rev C J1 Wiring Diagrams 8 1 8 PROGRAMMING WITH J1 WIRING DIAGRAMS The J1 programming circuits may be damaged by Electrostatic Discharge ESD Follow proper ESD procedures before touching any wire connected to J1 This section shows three voltage and three current programming methods Any one voltage method may be combined with any one current method In addition the pro gramming plug may be wired for voltage and current monitoring Section 6 2 Also these methods may be used in conjunction with remote voltage sensing Section 9 8 1 WIRING J1 LOCAL PROGRAMMING When shipped from the factory the J1 and J18 Programming Plugs are configured for e Local front panel knob programming of voltage and current e Local internally from the bus bars sensing of output voltage e Output monitoring set to 5 VDC full scale Section 6 2 The default J1 jumper configuration is Current Programming Local Internal Voltage Sense
50. the basic wiring Programming Source shown in Figure 5 Remove the jumper between J1 4 and J1 5 and add the circuit shown 0to5Vor The maximum voltage from the programming source is either 5 volts or 10 volts If J1 6 is left open the ESS is in the 5 volt programming mode If J1 6 is grounded to J1 8 or to J1 21 it is in the 10 volt mode e A In the 5 volt programming mode the J1 4 input 8 6 4 impedance is ten megohms to the J1 8 return In the 10 volt programming mode the impedance is 6 Open 0to 5V Programming Source twenty kilohms If the J1 4 input is disconnected 9 19 8 50 10 V Programming Source the ESS output will drop to zero volts In this configuration the front panel voltage knob is disabled However the current knob will still operate Typically the current knob is set fully clockwise to maximum to ensure the supply remains in voltage mode The current knob may be turned down to protect the load Higher Voltage Higher Output Document 83 510 004 Rev C 8 4 8 4 8 5 J1 Wiring Diagrams WIRING J1 PROGRAM VOLTAGE USING REMOTE CURRENT A user supplied variable current may be used to control the ESS output voltage The controlling current must be converted to a controlling voltage by applying an external re sistance The input at J1 4 has a ten megohm impedance If the programming line is disconnected the ESS output will drop to zero volts To install this feature start with th
51. to 5 Volt programming e 20Kilohms for O to 10 Volt programming Care must be taken in analog programming In power systems problems in accuracy and stability can occur These problems are typically caused by e Ground reference offsets between the programming source and the ESS J1 inputs The source has to be tied closely to the negative Bus Bar of the supply e Ground loops generated in the programming lines Do not make multiple connec tions between the negative Bus Bar and the J1 Programming Ground e Common mode noise pickup in programming lines Keep those wires twisted to gether Twisted pair with a shield to chassis is better THE IEEE RS232 PROGRAMMING OPTION The IEEE 488 and RS 232 digital programming option includes commands for pro gramming the output voltage and the current There is also a command to set the ESS to Local mode so the front panel knobs may be used When the digital port is being used the front panel voltage and current knobs are disabled See Specifications Section 12 8 3 for digital programming accuracy See the User Man ual For Embedded IEEE Option document number 83 468 007 for further details If the power supply has an IEEE RS232 Interface card the card will only work if the voltage and current programming are set to the 5 Volt range J1 6 and J1 13 are not connected Document 83 510 004 Rev C Measure the Output 6 1 6 MEASURING THE OUTPUT 6 1 THE FRONT PANEL DISPLAYS The ESS
52. tor is 5 volts Current Source Higher Current Higher Output Document 83 510 004 Rev 9 9 1 9 1 1 9 1 2 9 2 Remote Sensing 9 1 REMOTE VOLTAGE SENSING During normal operation the ESS senses the output voltage at its POS bus bar How ever the voltage at the load will be somewhat less because the load cables and connections cause voltage drops Where high accuracy is required the ESS may be configured for remote sensing In this mode the voltage at the ESS bus bars will be higher than what the ESS is programmed to but the voltage at the load will be correct Since the front panel voltmeter is internally connected to the sensing terminals it will display the voltage at the sense lines not the power supply output bus bar voltage If the remote sensing lines are disconnected the ESS will continue to operate nor mally However there will be a small loss of output accuracy The ESS output voltage or current will increase by a few percent However the measurement circuits including the front panel displays will accurately show the change in output voltage and current If the sense inputs are miswired the ESS output may immediately go above its maximum output rating with NO CONTROL Damage to the ESS and user load is likely to occur CONNECTING THE REMOTE VOLTAGE SENSE LINES Positive Sense Lead The connector which mates to J18 is made by Amp part 640429 2 The output POS bus bar is i
53. use ful because it scales high output voltages reduces noise in the sense line and because all monitors have the same full scale regardless of the ESS maximum output rating The full scale voltage from the Voltage Monitor is o to 5v or Higher Voltage user selectable If J1 1 is open no wire full scale 0to 10V OB Higher Output is 5 VDC This is the default setting If J1 1 is con nected to J1 21 full scale is 10 VDC Monitor Measure Voltage ground is at J1 21 or J1 8 NEG POS The J1 19 monitor output is NOT floating It is al iu ways referenced to the NEG bus bar which is con 9 nected to J1 21 and J1 8 eanunuunanaut t Pin 1 Open 0 0 5 V Measurement Pin1 to21 0 to 10 V Measurement Document 83 510 004 Rev C 6 2 Measure the Output 6 2 2 Monitor Output Current Using J1 The Current Monitor from J1 20 is a calibrated output signal which varies from O to 5 volts as the ESS output current varies from zero to full rating The monitor output is use ful because it amplifies the small current sense signal reduces noise in the sense line and be Measure Voltage cause all monitors have the same full scale re gardless of the ESS maximum output rating 0 to 5V or Higher Voltage The full scale voltage from the Current Monitor ore Qo is user selectable If J1 2 is open no wire full scale is 5 VDC This is the default setting If NEG POS Partof J1 2 is connected to J1 21 full scale is 10 VDC J1
54. ve test procedure is noted do not hesitate to call Lambda EMI Customer Service for assistance CONTACTING LAMBDA EMI CUSTOMER SERVICE Phone 732 922 9300 E mail service lambda emi com Fax 732 922 5403 Customer Service or an approved Service Center should be contacted if e The power supply is mechanically or electrically damaged e The power supply requires on site calibration routine internal cleaning or replace ment warning decals e The customer has questions about a special application which is not described in this manual Normally the customer may NOT open any chassis covers which have a warranty seal Breaking a seal will void the warranty At the discretion of Lambda EMI the customer may be granted permission to break the warranty seal and open the chassis covers Customer Service shall confirm the permis sion by sending a replacement seal Once the unit has been serviced the customer shall close the cover and apply the replacement seal adjacent to not on top of the bro ken seal RETURNING DEFECTIVE UNITS The procedure for returning defective products is given in the preamble section of this manual Document 83 510 004 Rev C 3 3 1 3 2 3 3 Installation 3 1 INSTALLATION 19 INCH RACK MOUNTING This power supply is intended for mounting in a conventional 19 inch rack Its 3 47 inches height makes it 2U size instrument The rack should enclose the sides top and back to protect the oper
55. voltage and current outputs are continuously measured on two Light Emitting Diode LED displays They have seven segment red bars on a black background Their resolution is three and a half digits 000 to 1999 The decimal point is set at the factory and it does not change position The front panel voltmeter will always display the voltage between J18 2 and J1 8 In re mote voltage sensing applications see Section 9 the voltmeter shows the voltage at the point being sensed not the bus bar voltage The front panel ammeter will always display the current flowing through the NEG bus bar output Remote current sensing is not directly possible 6 2 MEASURING OUTPUT USING THE J1 CONNECTOR With the rear panel J1 connector there are four ways to use an external voltmeter to measure the ESS output voltage and or current Measure Signal Source Signal See What Type Pin Full Scale Section Output Voltage Monitor J1 19 0 to 5 10 VDC 6 2 1 Output Current Monitor J1 20 0 to 5 10 VDC 6 2 2 Output Voltage Measure J18 1 0 to Max Output 6 2 3 Output Current Measure J1 12 to 0 100 VDC 6 2 4 There are important constrains Read the See Sections carefully Table 6 Output Measurement Schemes Using J1 6 2 1 Monitor Output Voltage Using J1 The Voltage Monitor from J1 19 is a calibrated output signal which varies from 0 to 5 volts as the ESS output voltage varies from zero to full rating The monitor output is
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