Technical Specification
Contents
1. 10 Built in Buzzer Alarm 11 Select either RS 232C standard or GPIB option 0 05 50mV OV 30mA x 0 2 60mA lt 0 2 30mA 0 2 30mA 0254 lt 0 2 30mA S 0 2 30mA 029 lt 0 2 30mA 0 2 30mA 0 2 6V on Voltage 36V sim OE Program ov Current Resolution PSH SERIES PROGRAMMABLE POWER SUPPLY USER MANUAL PSH 1036 36A PSH 1070 70A PSH 10100 100A PSH 2018 18A PSH 2035 35A PSH 2050 50A PSH 3610 10A PSH 3620 20A PSH 3630 30A PSH 6006 6A PSH 6012 12A PSH 6018 18A 0 05 25mV 0 05 50mV x 0 2 90mA eer lt 0 2 60mA 3 x 0 2 30mA 60 A lt lt lt D lt V 2 o lt Readback Meter Accuracy to Je Jo id D lt lt lt o o ch ge S S da da oO oO lt 0 2 30mA 0 2 30mA S 0 2 4 30mA I0mV Readback Meter a eadbac eter Resolution Current Recovery Time 50 step load change from 25956 1590 z2ms Voltage Up 1096 9096 lt 150ms lt 150ms lt 150ms f 95 rating load Response Time Voltage Down 90 10 lt 150ms lt 150ms lt 150ms 10 rating load Q lt z o Q oO PSH SERIES PROGRAMMABLE POWER SUPPLY USER MANUAL AALAAAZLLA LAAALALAAALZEAA 10V PSH 1036 36A PSH 1070 70A PSH 10100 100A 20V PSH 2018 18A PSH 2035 35A PSH 2050 50A 36V PSH 3610 10A PSH 3620 20A PSH 3630 30A 60V PSH 6006 6A2. 5 3 Over Voltage Current Protection Setting 5 4 5 5 5 6 Over Voltage Protection Setting Set to OVP SET window by pressing MENU modify the OVP setting value with F C key to input integral or dismal number then press ENTER OVP Status Clear Up When the output voltage exceeds the setting voltage the instrument will stop output and get into OVP mode by displaying OVP Error Press LOCAL to reset messages on the panel Now press LOCAL to clear OVP status back to previous status Over Current Protection Setting Set to OCP SET window by pressing MENU then switch OCP to ON or OFF with the knob and press ENTER When the OCP is on the output current equals or exceeds the setting current the instrument will stop output and get into OCP mode by displaying OCP Error Press LOCAL to reset messages on the panel Now press LOCAL to clear OCP status back to previous status Display Contrast Setting Set to Contrast Setting window by pressing MENU modify the Contrast setting value with knob then press ENTER Buzzer Setting Set to Buzzer Set window by pressing MENU switch Buzzer to ON or OFF with the knob then press ENTER GPIB RS232 Interface Setting Set to Interface window by pressing MENU If the GPIB is displayed the Address value window will be appeared if the RS 232 is displayed the Baud Rate window will be appeared then Xx ond PSH SERIES PROGRAMMABLE POWER SUPPLY
3. switch 3 Rotary Encoder Wheel knob 4 Output Turn on or off output by pressing the knob 5 Vse ket Output voltage and Output current switched ENTER setting ENTER This key is for digit value input or setting confirmation 6 F C Switch to wheel knob for coarse and fine adjustment 7 MENU The selection menu for function setting PS If there is no further setting change after switching to MENU 4 5 seconds it will be back to the previous window or output display window 8 Local This key has two function GPIB RS 232 l Clear the remote control and replace with panel control setting 2 Clear the protection status of power supply PS Press and hold the key for 5 seconds to get into calibration mode 9 Cooling Fan A cooling fan 10 GND Terminal Connect the ground terminal to chassis 11 Output Terminal Positive output terminal Output Terminal Negative out put terminal 12 S a positive input voltage remote sense terminal S a negative input voltage remote sense terminal M a positive output voltage monitoring Terminal M a negative output voltage monitoring terminal 13 Interface GPIB or RS 232C communication interface PSH SERIES PROGRAMMABLE POWER SUPPLY USER MANUAL AAA 14 AC Power Terminal AC power input terminal The input is from 90 to 250Vac AC Input Cord WARNING The AC input cord is the disconnect device for the power supply The input cord must be no longer than 9
4. USER MANUAL using the wheel knob to modify the value and press ENTER to complete the setting Note The system will detect the interface used at present automatically and switch the detected interface over the setting interface of GPIB or RS232 Example 1 If want to set the GPIB address value to 08 Set to interface window by pressing MENU and adjust the address value to 08 with the wheel knob and press ENTER to complete the setting 2 If want to set the RS 232 Baud Rate to 9600 Set to interface window by pressing MENU and adjust the Baud Rate value to 9600 with the wheel knob and press ENTER to complete the setting For further details plase refer to the programmer manual of PST PSS PSH series programmable power supply Remote Error Sensing A normal power supply can perform its best load regulation line regulation low output impedance and low output ripple and noise as well as the rapidly transient recovery response Please refer to figure 52 If there is any test lead connected between load and output terminal the best characters of power supply can not be shown up on the load terminal Power supply Figure 5 2 The power supply with local error sensing PSH SERIES PROGRAMMABLE POWER SUPPLY USER MANUAL The function of the Remote Error Sensing can only be applied to the Constant Voltage mode as shown in Figure 5 3 The feedback point of power supply must start from the load terminal directl
5. 84 feet 3m Be sure the AC input cord is well connected according to Figure 1 and Figure 2 before operation The recommended AC input cord is specified in the table as follows Add a nomlocking plug suitable for use in the country in which you are operating Power Wire Tvpe Ratin Cable Outside Cable Gland Suppl yp 8 Diameter Strain Relief 3x18 AWG 60 Gnin 5 84 6 73m m KSS SVT stranded copper 300V 0 230 0 265 PG 1610 3x14 AWG 60 Gmin 9 143 10 03m m KSS ous 300V_ 0 360 0 395 PG 2013 1 Strip the outside insulation on the AC cable approximately 4 10cm Trim the wires to make the ground wire is 0 5 12mm longer than the other wires and join the toric terminals to each stripped wires individually 2 Unscrew the base of the strain relief from the helix shaped body Insert the base through the outside opening in the AC input cover and screw the locknut securely onto the base from the inside 3 Insert the AC cable through the strain relief base until the outer cable jacket is adjoined with the edge of the base Tighten the body to the base while holding the cable in place and the cable is fastened securely inside the strain relief 4 Connect the toric terminals to AC terminals of rear panel individually PSH SERIES PROGRAMMABLE POWER SUPPLY PSH SERIES PROGRAMMABLE POWER SUPPLY USER MANUAL USER MANUAL 5 Screw the AC input cover to the AC terminal on the rear panel e Front Panel tight
6. by using the F C key and adjust the value to number 00 with the rotation knob then switch the cursor to V range by using the F C key number and adjust the value to number 20 with the rotation knob to complete the modification PS At the moment if the OUTPUT is on the output voltage will be output the corresponding voltage value immediately following the adjustment of the rotation knob Output Current Setting Switch the flashed cursor to current input position by pressing Vset Iset key and modify the setting value by using the wheel knob Now use the F C key to input the integral or dismal number Example Set voltage at 18 00A Switch the cursor to mA range by using the F C key and adjust the value to number 00 with the rotation knob then switch the cursor to A range by using the F C key and adjust the value to number 18 with the rotation knob to complete the modification PS When the load current of output terminal exceeds the current setting value the instrument is operated under the Constant Current mode C C Mode if it doesn t exceed the current setting value the instrument is operated under the Constant Voltage mode C V Mode If the maximum output voltage of the instrument is larger than 36V the minimum adjustable step of the rotation knob is Ups PSH SERIES PROGRAMMABLE POWER SUPPLY USER MANUAL 20mV if it is smaller than 36V the minimum adjustable step of the rotation knob is l0mV
7. IES PROGRAMMABLE POWER SUPPLY USER MANUAL SAFETY TERMS AND SYMBOLS These terms may appear in this manual or on the product N WARNING Warning statements identify condition or practices that could result in injury or loss of life practices that could result in damage to this product or i CAUTION Caution statements identify conditions or other property The following symbols may appear in this manual or on the product A NOTI 4 DANGER ATTENTION Protective Earth ground Frame or Chassis High Voltage refer to Manual Conductor Terminal Terminal Terminal PSH SERIES PROGRAMMABLE POWER SUPPLY USER MANUAL FOR UNITED KINGDOM ONLY NOTE This lead appliance must only be wired by competent persons WARNING THIS APPLIANCE MUST BE EARTHED IMPORTANT The wires in this lead are coloured in accordance with the following code Green Yellow Earth Blue Neutral Brown Live Phase As the colours of the wires in main leads may not correspond with the colours marking identified in your plug appliance proceed as follows The wire which is coloured Green amp Yellow must be connected to the Earth terminal marked with the letter E or by the earth symbol e or coloured Green or Green amp Yellow The wire which is coloured Blue must be connected to the terminal which is marked with the letter N or coloured Blue or Black The wire which is coloured Brown must be connected to the terminal marked with the letter L or
8. MABLE POWER SUPPLY USER MANUAL Constant Voltage Range o Crossover Point Constant Current Range Output Voltage Output Current Figure 5 1 Constant Voltage Constant Current Characteristic Similarly crossover from the constant current to the constant voltage mode automatically occurs from a decrease in load a good example of this would be seen when charging a 12 volt battery Initially the open circuit voltage of the power supply may be preset for 13 8 volts A low battery will place a heavy load on the supply and it will operate in the constant current mode which may be adjusted for a 1 amp charging rate As the battery becomes charged and its voltage approaches 13 8 volts its load decreases to the point where it no longer demands the full 1 amp charging rate This is the crossover point where the power supply goes into the constant voltage mode 5 2 Output Voltage Current Setting At first set to voltage current setting window or output value displayed window Output Voltage Setting Switch the flashed cursor to voltage input position by pressing Vset Iset key and modify the setting value by using the wheel I gue PSH SERIES PROGRAMMABLE POWER SUPPLY USER MANUAL SSS _ _SSaa _ _ _L__ _E_SSS Z knob Now use the F C key to input the integral or dismal Set20 0QU 18 00A Example Set voltage at 20 00V Switch the cursor to mV range
9. P or coloured Brown or Red If in doubt consult the instructions provided with the equipment or contact the supplier PSH SERIES PROGRAMMABLE POWER SUPPLY USER MANUAL be _ _ _ _ __ L SS gt This cable appliance should be protected by a suitably rated and approved HBC mains fuse refer to the rating information on the equipment and or user instructions for details As a guide cable of 0 75mm should be protected by a 3A or 5A fuse Larger conductors would normally require 13A types depending on the connection method used Any moulded mains connector that requires removal replacement must be destroyed by removal of any fuse amp fuse carrier and disposed of immediately as a plug with bared wires is hazardous if a engaged in live socket Any re wiring must be carried out in accordance with the information detailed on this label ijv PSH SERIES PROGRAMMABLE POWER SUPPLY USER MANUAL 1 PRODUCT INTRODUCTION 1 1 Description PSH series Programmable Power Supply is ntrolled by Micro Processor Unit MPU that can easily connect communication interface RS232 or GPIB to computer in order to satisfy user s demands for autotesting and autocontrol The series of products have improved greatly the shortage of the tradit ional big size heavy weight products The voltage and current are completely controlled by 12 bits D A Converter with higher resolution and accuracy Also the digitaliza
10. PSH 6012 12A PSH 6018 18A Temperature Voltage lt 100ppm C lt 100ppm C lt 100ppm C ERE ii OVP OCP OHP provided Protection Rush Cent Provided provided provided Protection PA ura Ll provided provided provided Contro Dimensions 108X141 888 188 X141 3888 268 X141 888 Mechanical WHD m m m m m m Spec Weight Approx 3 3 kg Approx 6 2 kg Approx 9 3 kg 100 230V 100 230V 100 230V 100 230V Operation Indoor use Environmental Altitude up to 2000 m Ambient temperature To satisfy specifications 10 C to 35 C 50 F to 95 F Maximum operating ranges 0 C to 40 C 32 F to 104 F Relative humidity 85 RH max non condensing Installation Category II Pollution degree 2 Storage Temperature amp 10 to 70 C 70 RH maximum Humidity Instruction manual Accessories Cable Gland AC Input Cover PSH SERIES PROGRAMMABLE POWER SUPPLY PSH SERIES PROGRAMMABLE POWER SUPPLY USER MANUAL USER MANUAL 3 PRECAUTIONS BEFORE OPERATION 3 1 Unpacking the Instrument PSH 10100 100A The product has been fully inspected and tested before shipping from the PSH 2050 50A 6 3A 250V ACo8 factory Upon receiving the instrument please unpack and inspect it to PSH 3630 30A 100 230VAC 90 250VAC 0 5A 250VACXL check if there is any damage caused during transportation If any sign of i PSH 6018 18A damage is found notify the bearer and or the dealer immediately 3 2 Checking the Line Voltage f WARNING To av
11. PSH SERIES PROGRAMMABLE POWER SUPPLY USER MANUAL C Declaration of Conformity We GOOD WILL INSTRUMENT CO LTD i CONTENTS PAGE Neo Th Pao Chung Rai Hsin Tien Ciy Taper Hsien Taiwan 1 PRODUCT INTRODUCTION eenttttnnnntne 1 declares that the below mentioned product 1 1 Description eee e ree ee eroe rennen here sias 1 PSH 1036 2018 3610 6006 12 Feat res erect rera prec has urere cocsvucescveaescsescdes 1 PSH 1070 2035 3620 6012 2 TECHNICAL SPECIFICATIONS ee eeeeeeee 3 PSH 10100 2050 3630 6018 3 PRECAUTIONS BEFORE OPERATION 6 are herewith confirmed to comply with the requirements set out in the Council Directive on 3 1 Unpacking the Instrument ee eee eene 6 the Approximation of the Law of Member States relating to Electromagnetic Compatibility 3 2 Checking the Line Voltage eee eeeee ee ees 6 89 336 EEC 92 31 EEC 93 68 EEC and Low Voltage Equipment Directive 3 3 Emvironment scscccscsscescscscscccncecscscenece cesses 7 73 23 EEC For the evaluation regarding the Electromagnetic Compatibility and Low 4 PANEL INTRODUCTION cccccccccccccccccccsecccsccececccee 8 Voltage Equipment Directive the following standards were applied 5 OPERATION METHOD cccsscccesseeesseeeeseeeseseenes 13 EMC 5 1 Constant Voltage Constant Current Crossover EN 61326 1 Electrical equipment for measurement control and labora
12. b and press ENTER to leave the calibration window Cleaning To clean the power supply use a soft cloth dampened in a solution of mild detergent and water Do not spray cleaner directly onto the instrument since it may leak into the cabinet and cause damage Do not use chemicals containing benzine benzene toluene xylene acetone or similar solvents Do not use abrasive cleaners on any portion of the instrument PSH SERIES PROGRAMMABLE POWER SUPPLY USER MANUAL 7 THE SYSTEM DIAGRAM AND DESCRIPTION 7 1 Block Diagram Opto Isolator Unit 1 Driver Circuit Voltage Analog Control Switch Circuit and Sample Hold Current Control F Interface Keyboard RS 232 or GPIB PSH SERIES PROGRAMMABLE POWER SUPPLY USER MANUAL SS _ ___EE _ _ _ _ _EE 7 2 The Configuration of PSH series Block System The whole Block system consists of the following Circuit Blocks Power Factor Corrector BD101 Q101 Q103 D102 Micro Processor Unit MPU U308 Digital to Analog Converter DAC U316 Analog Switch Circuit U328 R356 R363 R370 C314 C318 C320 U331 Pulse Width Modulation U206 Driver Circuit Q202 Q203 T202 Power Stage Q204 Q205 Q211 Q212 T203 D207 D208 L201 C246 C249 C253 Post Regulator Q207 Q208 Voltage Control Circuit U334 Current Control Circuit U334 Error Amplifier U333 Opto isola
13. ds if the specification of current is smaller than 20A can either use 20A range of GDM 8145G or connect current shunt to output terminal to measure the output current If the specification of current is larger than 20A must connect current shunt to output terminal to measure both ends of the current shunt with 200mV range of DMM Step 3 1 Get into the window of Calibration item select the item of current calibration with knob and press ENTER to startCurrent Calibration Steps Step 3 2 Input measured voltage value Max with the knob and press 1293 d PSH SERIES PROGRAMMABLE POWER SUPPLY USER MANUAL 6 2 ENTER During the value input use F C key to switch over the integral or dismal number input Step 3 3 Input measured voltage value Min with the knob and press ENTER During the value input use F C key to switch over the integral or dismal number input Step 4 Unplug the test lead switch to the window of OVP calibration item with the knob press ENTER to start automatically OVP calibration item Step 4 1 Now the window will display the calibration progress After the calibration is finished the system will jump out the window Step 5 After make sure all the calibration procedure is completed and correct switch the window to Save and press ENTER key to finish the calibration procedure Step 6 If it is not necessary to store the calibration data just switch to EXIT with the kno
14. e included to the equipment measure TP501 and TP502 adjust VR501 to ensure the difference of voltage between two points is 10Vpq and the TP504 among the Unit 2 and Unit 3 must be larger than TP503 to be about 40m V pc Output Calibration Steps Step 1 Repress LOCAL for 4 5 seconds the window will appear Please enter the password vary with different models PSH 1036 1036 PSH 6006 6006 now input the value number with the knob and use F C key to move key in position then press ENTER key When the value number is input by mistake the system will jump out this mode Step 2 Voltage Calibration Steps PSH SERIES PROGRAMMABLE POWER SUPPLY USER MANUAL a A At first set the DMM to 200V voltage range PSH SERIES PROGRAMMABLE POWER SUPPLY USER MANUAL Step 2 1 Get into the window of Calibration item select the item of Voltage calibration with knob and press ENTER Step 2 2 Input measured voltage value Min with the knob and press ENTER During the value input use F C key to switch over the integral or dismal number input Step 2 3 Now adjust VR301 properly for the measured voltage Max of DMM according to the value displayed in the window then press ENTER Note During the adjustment the maximum distortion range of the measured value is at 0 005V Step 3 Current Calibration Steps At first make sure the output is disconnected with test lea
15. ly The stripped wired must be wrapped up with an isolated duct for safety Figure 2 10 11 PSH SERIES PROGRAMMABLE POWER SUPPLY USER MANUAL e Rear Panel 12 e 1010 W Js VA 1450 W PSH SERIES PROGRAMMABLE POWER SUPPLY USER MANUAL COISDRUWNNSEEN E UI IM MEME IUNII ES EM EE SLCC MEUM MU IEEE 5 OPERATION METHOD The voltage and current unit applied for the instrument is Volt and Ampere 5 1 Constant Voltage Constant Current Crossover Characteristic The working characteristic of this series is called a constant voltage constant current automatic crossover type This permits continuous transition from constant current to constant voltage modes in response to the load change The intersection of constant voltage and constant current modes is called the crossover point Fig 5 1 shows the relationship between this crossover point and the load For example if the load is such that the power supply is operating in the constant voltage mode a regulated output voltage is provided The output voltage remains constant as the load increases up until the point where the preset current limit is reached At that point the output current becomes constant and the output voltage drop is proportioned to further increases in load The crossover point is indicated by the front panel LCD display The crossover point is reached when the CV indicator transfer to CC indicator PSH SERIES PROGRAM
16. oid personal injury disconnect the power The product can be applied to 100V 230VAC voltages shown in the table cord before removing the fuse holder below WARNING To avoid electrical shock the power cord protective 3 3 Environment grounding conductor must be connected to ground The normal ambient temperature range of this instrument is from 0 to 40 C 32 to 104 F To operate the instrument exceeding this specific temperature range may cause damage to the circuits of instrument Do not use the instrument in a place where strong magnetic or electric field exists as it may disturb the measurement Replace the required fuses according to the table below Model AC Input AC Input Range Fuse N CAUTION To avoid damaging the instrument do not use PSH 1036 36A Goa itin a place where ambient temperature exceeds 40 C PSH 2018 18A GONE 100 230VAC 90 250VAC 6 3A 250V AC WARNING This is a Class A product In a domestic 195 N environment this product may cause radio interference in PSH 6006 6A which case the user may be required to take adequate PSH 1070 70A measures conie un 100 230VAC 90 250VAC sale ph epee PSH 3620 20A 0 5A 250VACXL PSH 6012 12A PSH SERIES PROGRAMMABLE POWER SUPPLY USER MANUAL 4 PANEL INTRODUCTION 1 Display Indicate the setting of voltage current value output voltage current value and the status of setting and output 2 Power Switch Connect the AC power then press power
17. rm any servicing other than the operating instructions unless you are qualified to do so Warning Do not remove covers Refer servicing to qualified personnel Warning No operator serviceable components inside Warning For continued fire protection Replace fuse only with 250V fuse of the specific type and rating and gt gt e disconnect power cord before replacing fuse 6 1 ADJUSTMENT AND CALIBRATION The instrument has been fully calibrated at factory before delivery The readjustment is suggested only when the circuit of the instrument is modified or the instrument is proved exceeding the specification by the sophisticated measured equipment However the accuracy of the calibrated multimeter must be within 40 196 or better GW model GDM 8145G or the equivalent equipment and 20 PSH SERIES PROGRAMMABLE POWER SUPPLY USER MANUAL ImV AMP 25 Current Shunt Besides the current rating of the output load must be larger than the 10 of the output current at least Preparation 1 2 3 30 minutes warm up before calibration Ambient temperature 23 45 C Humidity Under RH70 When the instrument is powered on but not yet output use multimeter to measure TP301 AND TP302 adjust VR303 to ensure the difference of voltage between two parts is at 10V pc then measure TP303 and TP304 adjust VR302 to make TP303 larger than TP304 to be about 100mVpg If the Unit 2 and Unit 3 ar
18. tion of system makes a speedy precise and convenient input of information controlled by the keyboard and rotation knobs The adjustment of voltage current is made by software calibration without manual error that will increase the preciseness of the instrument The function of Over Voltage Protection OVP and Over Current Protection OCP is set with software and detected with hardware to achieve protected function precisely and speedily in order to prevent users from danger by using the instrument 1 2 Features 1 Wide Input Voltage Range and High Power Factor P F 2 High Efficient 3 Constant Voltage and Constant Current Operation 4 The protection for Over Voltage Over Current and Over Heat PSH SERIES PROGRAMMABLE POWER SUPPLY USER MANUAL 5 IEEE 488 2 and SCPI Compatible Command set PSH SERIES PROGRAMMABLE POWER SUPPLY USER MANUAL SS S SE E _ _ _ _L_L_LLLL__EEEE 2 TECHNICAL SPECIFICATIONS 6 Remote Control 7 Output On Off Control PSH 1036 36A PSH 1070 70A PSH 10100 100A PSH 2018 18A PSH 2035 35 A PSH 2050 50A 8 Self test and Software Calibration PSH 3610 10A PSH 3620 20A PSH 3630 30A 9 LCD Display PSH 6006 6A PSH 6012 12A PSH 6018 18A Regulation CV C C aes 0 2 5mA 0 2 10mA S0 2 15mA Voltage mVrms lt 10mVrms 100mVpp 20Hz 20MHz Ripple amp Noise Current mArms lt 029420mA S0 2 40mA 3 0 0595425mV
19. tor U209 Auxiliary Power supply Q201 U203 T201 OVP U315 U331 Q209 U327 Q310 U328 Unit 2 When the power reaches about 2 times the Unit 1 the Unit 2 will be used additionally Unit 3 When the power reaches about 3 times the Unit 1 the Unit 2 and Unit 3 will be used additionally 9G eS
20. tory use EMC Characteristic enero toten eoe eere uten voee eeu 13 requirements 1997 A1 1998 52 Output Voltage Current Setting sese 14 E 5 5 Buzzer Setting eee eee reete eene 16 EN 61000 3 2 1995 A1 1998 A2 1998 A14 2000 EN 61000 4 3 1996 5 6 GPIB RS 232 Interface Setting eese 16 Electrical Fast Transients 5 7 Remote Error Sensing eese 17 EN 61000 3 3 1995 EN 61000 4 4 1995 5 8 Test Lead Selective Table eee eee 19 Le EN 61000 4 5 1995 6 MAINTENANGE eee see eeu eeu eoe renr odo aoo p aera ne eaa ea so 20 Conducted Susceptibility 6 1 Adjustment and Calibration cesses 20 BEEN ud pec o ean 33 Conducted and Radiated Emissions Electrostatic Discharge 5 3 Over Voltage Current Protection Setting 16 EN 55011 1991 A1 1997 A2 1996 N 61000 4 2 1995 54 Display Contrast Setting 16 Voltage Dips Interrupts EN 61000 4 11 1994 7 THE SYSTEM DIAGRAM AND DESCRIPTION 24 Safety 7 1 Block Diagram sscesecececcccscecececcecscscececceseees 24 7 2 The Configuration of PSH series Block System 25 Low Voltage Equipment Directive 73 23 EEC amp amended by 93 68 EEC E Contig rati n of POEESCHOS Block System EN 61010 1 1993 A2 1995 IEC 61010 1 1990 A2 1995 USA UL 3111 1 First Edition June 1994 Canada CSA C22 2 No 1010 1 92 PSH SER
21. y Therefore the power supply can display its function on the load terminal instead of output terminal To compensate the voltage drop causing from the test lead it needs to shift the voltage from the output terminal of power supply and the voltage on the load terminal remains unchanged Power supply Figure 5 3 The power supply with remote error sensing Error Sensing Open Protection The sensing circuit must avoid open circuit without equipping with Relay Switch and Connector When the open circuit is occurred abruptly on the sensing circuit it will causeovershoot on the output terminal To prevent this kind of phenomenon add small resistance R1 and R2 or replace with diode as shown in the Figure 5 4 Power supply Ri PSH SERIES PROGRAMMABLE POWER SUPPLY USER MANUAL Ell 5 8 Test Lead Selective Table When we use PSH SER models power supply the test lead must have an enough current capacity to prevent from damaged The following is test lead selective table shows the maximum current rating based on 450A cm A large test lead is recommended in order to reduce the voltage drop as less as better on the test lead typical 0 5V maximum Wire Size Max Current Wire Size Max Current AWG A AWG A PSH SERIES PROGRAMMABLE POWER SUPPLY USER MANUAL E 6 MAINTENANCE WARNING The following instructions are executed by qualified personnel only To avoid electrical shock do no perfo
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