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E1476A 64-Channel 3-Wire Relay Multiplexer Module Service Manual

1. 4 CH23 9 6 6 CH24 o G G HIH CH31 00 01 G 2 1 HIH L c c RTA CH93 i K OHM v SENSE G REFERENCE REF THERMISTER RELAYS THERMISTOR RTB CH94 i 1 SOURCE H H LAL O gt HIH C CH32 00 016 C s o7 0 95H H C e 4 oO LIL C CH39 oe 6 G a 1 o H H C 0 95L L CH40 GIG e C VSB CH91 VOLTAGE SENSE J o EE BANK B gt 222 oo k C CH48 GIG 0 H H e CH55 9 6 G CS CH92 1 RECS H H CURRENT source T ee pa BANK B i HIH LIL CH63 gt oo 26 6 BANK Bank I BG VOLTAGE SENSE BUS ANALOG BUS tt tt 1 4 bu L i bog 616 11 Li H H 1 rt 171 1 EuE 100 CURRENT SOURCE BUS a za zu E Figure 1 2 Agilent E1476A Schematic Diagram General Information 1 3 Relay Life End of Life Detection Replacement Strategy Note 1 4 General Information Electromechanical relays are subject to normal wear out Relay life depends on several factors The effects of loading and switching frequency are briefly discussed below Relay Load In general higher power switching reduces relay life In addition capacitive induct
2. ee 1 1 Specifications deu eel ae 8S de 1 1 Enyironment sd deese gibts doa Migs usd 1 1 Safety Information 1 1 ModuleSerialNumbers ees 1 2 Recommended Test Equipment 1 2 Schematic Diagram 1 2 Relay EURO ae UAR OS RA MUSS E ERRAT as 1 4 End of Life Detection 1 4 Replacement 5 1 4 Chapter 2 Verification Tests Introduction a p e Pu IAS RN UR 2 1 Test Conditions 2 1 Performance Test Record 2 1 Verification Test 2 1 Test ot ene bles he aede eU eed GLA 2 1 Functional Verification 2 3 Procedure adu eee a uda Ae arde eso Ua qox evi 2 3 Example ex Rea HE a xor REESE anus 2 3 Self test Error Codes oen 2 4 Agilent E1476A Performance Verification 2 4 Test 2 1 Closed channel Resistance Test 2 5 Test 2 2 Bank Control Relays optional test 2 11 Test 2 3 DC Isolation Se OES EES 2 15 Performance Test Record
3. Agilent 75000 SERIES C 64 Channel 3 Wire Relay Multiplexer Module Agilent E1476A nene Service Manual Enclosed is the Service Manual for the Agilent E1476A 64 Channel Relay Multiplexer Module Insert this manual along with any other VXIbus manuals that you may have into the binder that came with your Agilent Technologies mainframe or command module E Agilent Technologies CopyrightO Agilent Technologies Inc 1994 2006 All Rights Reserved E1476 90010 zd Manual Part Number E1476 90010 E0506 Printed May 2006 Edition 1 Rev 2 Microfiche Part Number E1476 99010 Printed in Malaysia E0506 Certification Agilent Technologies certifies that this product met its published specifications at the time of shipment from the factory Agilent Technologies further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Technology formerly National Bureau of Standards to the extent allowed by that organization s calibration facility and to the calibration facilities of other International Standards Organization members Warranty This Agilent Technologies product is warranted against defects in materials and workmanship for a period of one 1 year from date of shipment Duration and conditions of warranty for this product may be superseded when the product is integrated into becomes a part of other Agilent products During the wa
4. VIVO Figure 3 2 Agilent E1476A Relay Locations 3 4 Replaceable Parts Table 3 2 Agilent E1476A Terminal Module Assembly Replaceable arts Reference Agilent Part Qty Part Description Mfr Mfr Part Number Designator Number Code 1 03852 01201 1 Clamp 28480 03852 01201 2 03852 86701 1 Pad Clamp 28480 03852 86701 3 0515 2109 1 Screw Mach 10 24 0 625in long Pan Head 28480 0515 2109 4 1390 0846 2 Fastener Captive screw M2 5 x 0 45 28480 1390 0846 5 E1300 01202 1 Clamp Strain Relief 28480 E1300 01202 6 E1400 44108 1 Terminal Housing bottom 28480 E1400 44108 7 E1400 44105 1 Terminal Housing top 28480 E1400 44105 Figure 3 3 Agilent E1476A Terminal Module Assembly Replaceable Parts 3 5 3 6 Replaceable Parts Table 3 5 Agilent E1476A Reference Designators Reference Designators A assembly BRK bracket C capacitor CR diode CVR cover F fuse electrical connector jack JM jumper K relay Linductor MP mechanical part P electrical connector plug PNL panel Qtransistor R resistor resistor pack SCR screw SHD shield SW switch TB terminal block U integrated circuit XJMremovable jumper Table 3 6 Code List of Manufact
5. 90 day specifications Worst case reading 1 2 highest resistance that can be measured with the Agilent 3458A M U 0 5 of Reading 10 of Range 0 005 1 2x10 10x10 1x10 Q 6x10 Q Test Accu racy Ratio Test Accuracy Ratios are not defined for single sided measurements so T A R all closed channel resistance and DC isolation measurements have Not Applicable in the TAR column Verification Tests 2 17 Table 2 3 Performance Test Record for the E1476A Page 1 of 5 Test Facility Name Report No Address Date City State Customer Phone Tested by Model Ambient temperature Serial No Relative humidity Options Line frequency nominal Firmware Rev Special Notes 2 18 Verification Tests Model Table 2 3 Performance Test Record for the E1476A Page 2 of 5 Report No Date Test Equipment Used Description Model No Trace No Cal Due Date o 09 5 e m s k ET m EN e a A e A o En A A e Verification Tests 2 19 Table 2 3 Performance Test Record for the E1476A Page 3 of 5 Model Report No Date Guard Meas Channel Min Hi Lines Test Lo Lines Test Lines Test Maximum Uncert Test 2 1 Closed channel
6. e Attach tag to device that identifies Owner Model Number Serial Number Service Required e Place tagged device in approved anti static bag 2 Package the module e Place packaged device in shipping carton e Place 75 to 100 mm 3 to 4 inches of shock absorbing material around the module e Seal the shipping container securely Mark the shipping container FRAGILE SHIPPING CARTON ADDRESS 3 Ship the module to Agilent Technologies Place address label on shipping carton e Send carton to Agilent Technologies SHOCK ABSORBING MATERIAL We recommend that you use the same shipping materials as those used in factory packaging available from Agilent Technologies For other commercially available shipping materials use a double wall carton with minimum 2 4 MPa 350 psi test Figure 4 1 Packaging Shipping Guidelines Service 4 7 4 8 Service
7. Part Number 1476 90010 October 1994 Edition 1 Rev 2 Part Number 1476 90010 May 2006 Safety Symbols Instruction manual symbol affixed to product Indicates that the user must refer to the man N Alternating current AC ual for specific WARNING or CAUTION information to avoid personal injury or dam age to the product Direct current DC AN Indicates hazardous voltages Indicates the field wiring terminal that must _ be connected to earth ground before operating the equipment protects against electrical Calls attention to a procedure practice or con shock in case of fault WARNING dition that could cause bodily injury or death Calls attention to a procedure practice or con or Frame or chassis ground terminal typically CAUTION dition that could possibly cause damage to connects to the equipment s metal frame equipment or permanent loss of data WARNINGS The following general safety precautions must be observed during all phases of operation service and repair of this product Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design manufacture and intended use of the product Agilent Technologies assumes no liability for the customer s failure to comply with these requirements Ground the equipment For Safety Class 1 equipment equipment having a protective earth terminal a
8. 45 11mm long Pan Head 28480 0515 1968 SCR20 SCR21 0515 1135 Screw M3 x 0 5 25mm long Flat Head 28480 0515 1135 SHD1 E1476 00601 1 Shield Top 28480 E1476 00601 SHD2 E1476 00602 1 Shield Bottom 28480 E1476 00602 SP101 3101 3142 1 Switch DIP Surface SPST 0 025A 24VDC 28480 3101 3142 SP102 3101 3279 1 Switch DIP Rotary 8 pos 0 03A 30VDC 28480 3101 3279 3 2 Replaceable Parts SP102 NUN X X UZA ENS CUL Y SHD2 o d lo A SCR10 es o PNL1 MP2 Figure 3 1 Agilent E1476A Component Locator Replaceable Parts 3 3 VS MONSUPANUS DANS SSPANUSSDAN m n us NES S SON N SONSESPAN WALLETS BLS SONSMONSUN ASS YS MASA ea XN cay N ASSIA n ERY S OS N SNN E Bs zn AAA Am En UM VYVYVVYVIVVVVVVYVYVVVYVYVVVYVIVVVY
9. Ch amp 770 RETURN 780 790 Meas Have DMM Measure Resistance 800 OUTPUT Dmm TRIG SGL Trigger DMM 1 reading 810 ENTER Dmm Rdg Enter the reading 820 RETURN Verification Tests 2 9 Closed channel Resistance Test continued ie 830 Cont prog Pause and continue the program when ready 840 PRINT 850 PRINT Press CONTINUE when ready to proceed 860 PAUSE 870 RETURN 880 Lo chans Test channels 0 to 31 890 FOR Ch 0 TO 9 900 Ch 0 amp VAL Ch 910 GOSUB Chan tst 920 NEXT Ch 930 FOR Ch210 TO 31 940 Ch VAL Ch 950 GOSUB Chan tst 960 NEXT Ch 970 RETURN 980 Hi chans Test Channels 32 to 63 990 FOR Ch232 TO 63 1000 Ch VAL Ch 1010 GOSUB Chan_tst 1020 NEXT Ch 1030 RETURN 1040 END 2 10 Verification Tests Test 2 2 Bank Control Relays optional test Bank Control Relays Test The E1476A relay module has three bank control relays numbered 90 to 92 There is no simple method for testing these control relays because there are 1000 resistors in series with the HI LO and GUARD relay contacts see Figure 1 2 This test is optional because these relays are unlikely to wear out under normal use However if you need to test these relays use the following procedure Remember to subtract 100Q s from the measured value to get the contact resistance The 100Q resistors are 1 tolerance resistors The Reference Thermistor is used for thermocouple compensated measurements
10. Resistance Test Values in ohms 5500 5501 5502 5503 5504 5505 5506 5507 5508 5509 5510 5511 5512 5513 5514 5515 5516 5517 5518 5519 5520 5521 5522 5523 5524 5525 5526 5527 5528 5529 ss switch card number leading zero may be omitted Single sided specification Minimum does not apply 2 20 Verification Tests Table 2 3 Performance Test Record for the E1476A Page 4 of 5 Guard Meas Channel Min Hi Lines Test Lo Lines Test Lines Test Maximum Uncert Test 2 1 Closed channel Resistance Test Values in ohms ss30 ss31 5532 5533 5534 5535 5536 5537 5538 5539 5540 5541 5542 5543 5544 5545 5546 5547 5548 5549 5550 5551 5552 5553 5554 5555 5556 5557 5558 5559 5560 5561 5562 5563 ss switch card number leading zero may be omitted Single sided specification Minimum does not apply Verification Tests 2 21 Table 2 3 Performance Test Record for the E1476A Page 5 of 5 Guard Meas Channel Min Hi Lines Test Lo Lines Test Lines Test Maximum Uncert TAR Test 2 2 Bank Control Relay Closed channel Resistance Test Values in ohms
11. each failing channel Check connectors P1 and J1 for damage If the preceding steps fail to isolate the problem replace the module Service 4 3 Matching Relays tO Use Table 4 3 to find the reference designator of any relay on the E1476A Channels relay module Table 4 3 Channel Relays Reference Designators E1476A PCA Reference E1476A PCA Reference Channel Designator Channel Designator 0 K300 34 K534 1 K301 35 K535 2 K302 36 K536 3 K303 37 K537 4 K304 38 K538 5 K305 39 K539 6 K306 7 K307 40 K540 41 K541 8 K308 42 K542 9 K309 43 K543 10 K310 44 K544 11 K311 45 K545 12 K312 46 K546 13 K313 47 K547 14 K314 15 K315 48 K648 49 K649 16 K416 50 K650 17 K417 51 K651 18 K418 52 K652 19 K419 53 K653 20 K420 54 K654 21 K421 55 K655 22 K422 23 K423 56 K656 57 K657 24 K424 58 K658 25 K425 59 K659 26 K426 60 K660 27 K427 61 K661 28 K428 62 K662 29 K429 63 K663 30 K430 31 K431 90 K790 91 K791 32 K532 92 K792 33 K533 93 K793 94 K794 4 4 Service Repair Maintenance Guidelines ESD Precautions Soldering Printed Circuit Boards Post Repair Safety Checks This section provides guidelines for repairing and maintaining the Agilent E1476A multiplexer module including e ESD precautions e Soldering printed circuit boards Post repair safety checks Electrostatic discharge ESD may damage static sensitive devices in the multiplexer module This damage can range fro
12. the two control relays The program listing begins on the next page Bank Control Relays Resistance Test 10 20 CLEAR SCREEN 30 ASSIGN Mux TO 70914 40 ASSIGN Dmm TO 722 50 60 OUTPUT Dmm RESET 70 OUTPUT Dmm TRIG HOLD 80 OUTPUT Dmm FUNC OHMF RANGE AUTO 90 100 OUTPUT Mux RST 110 PRINT Testing Agilent E1476A Bank Control Relays 120 PRINT 130 PRINT Testing Relay 90 HI 140 PRINT Connect DMM 4 wire connections to Test Fixture VM Input Hl and BANK A HI 150 OUTPUT Mux ROUT CLOS 190 160 GOSUB Meas 170 PRINT Testing Relay 90 LO one PRINT Connect DMM 4 wire connections to Test Fixture VM Input LO and BANK 190 GOSUB Meas 200 PRINT Testing Relay 90 Guard 210 PRINT Connect DMM 4 wire connections to Test Fixture VM Input Guard and BANK A Guard 220 GOSUB Meas 230 OUTPUT Mux RST 240 PRINT 250 PRINT Testing Relay 91 HI PRINT Connect DMM 4 wire connections to Test Fixture VM Input HI and BANK B 270 OUTPUT Mux ROUT CLOS 191 280 GOSUB Meas 290 PRINT Testing Relay 91 LO 300 PRINT Connect DMM 4 wire connections to Test Fixture VM Input LO and BANK BLO 310 GOSUB Meas 320 PRINT Testing Relay 91 GUARD 330 PRINT Connect DMM 4 wire connections to Test Fixture VM Input Guard and BANK B Guard 340 GOSUB Meas 350 OUTPUT QMux RST 360 PRINT 370 PRINT Testing Relay 92 HI 380 PRINT Connect DMM 4 wire connections to Test Fixture VM Ohm l HI and BANK B HI 39
13. 0 OUTPUT Mux ROUT CLOS 192 Verification Tests 2 13 Bank Control Relays Resistance Test continued 400 GOSUB Meas 410 PRINT Testing Relay 92 LO 420 PRINT Connect DMM 4 wire connections to Test Fixture VM LO and BANK B LO 430 GOSUB Meas 440 PRINT Testing Relay 92 GUARD 450 PRINT Connect DMM 4 wire connections to Test Fixture VM Ohm l Guard and BANK B GUARD 460 GOSUB Meas 470 OUTPUT Mux RST 480 490 PRINT Testing Reference Thermistor and Relays 500 PRINT 510 PRINT Connect DMM 4 wire connections to Test Fixture VM Input HI and VM Input LO 520 PRINT Press CONTINUE when ready to proceed 530 OUTPUT Mux ROUT CLOS 193 540 PAUSE 550 OUTPUT Dmm TRIG SGL 560 ENTER Dmm Rdg 570 PRINT Reference Thermistor Reading and Relay 93 is VALS DROUND Rqg 4 Ohms 580 PRINT 590 PRINT Connect DMM 4 wire connections to Test Fixture VM Ohm I HI and VM Ohm l LO 600 PRINT Press CONTINUE when ready to proceed 610 OUTPUT QMux RST ROUT CLOS 192 194 620 PAUSE 630 OUTPUT Dmm TRIG SGL 640 ENTER Dmm Rdg 650 PRINT Reference Thermistor Reading and Relay 94 is VAL DROUND Radg 4 Ohms 660 PRINT 670 PRINT End of testing Bank Control Relays 680 STOP 690 Meas 700 PRINT Press CONTINUE when ready to proceed 710 PAUSE 728 OUTPUT Dmm TRIG SGL 730 ENTER Dmm Rdg 740 PRINT Contact resistance Measured Resistance 100 Ohms VALS DROUN
14. 2 17 Test ey a eee AY i OV es dy ee me ais 2 17 Measurement Uncertainty 2 17 Test Accuracy TAR 2 17 Contents 1 2 Contents Chapter 3 Replaceable Parts Introduction La une Ba stem embed ees 3 1 Ordering 3 1 Replaceable Parts List 3 1 Chapter 4 Service Introduction Lu fed nee hee A ee P a Ee 4 1 Equipment Required 4 1 Service Aids oa E a ee Bur EUR 4 1 Troubleshooting 4 1 Identifying the Problem lens 4 1 Testing the Assembly s vues RR A ee 4 3 Matching Relays 4 4 Repair Maintenance Guidelines 4 5 ESD Pr cautions Ue See verde deed 4 5 Soldering Printed Circuit Boards lees 4 5 Post Repair Safety Checks 4 5 Incoming 4 6 Shipping Guidelines e eA 4 7 Chapter 1 General Information Introduction Note Module Description Specifications Environment Safety Information This service manual contains information to test troubleshoot and repair the Agilent E1476A 64 Channel 3 Wire Multipl
15. 22 2 No 1010 1 1992 UL 1244 5 June 2001 Date Ray Corson Product Regulations Program Manager For further information please contact your local Agilent Technologies sales office agent or distributor Authorized EU representative Agilent Technologies Deutschland GmbH Herrenberger Strape 130 D 71034 B blingen Germany Agilent 75000 Series C Service Documentation Suggested Sequence for Using the Manuals Installation and Getting Started Guide Instrument Applications Using the Command Module Plug in Module Mainframe Command Module User s Manuals User s Manual User s Manual Repairing the Command Module Plug in Module Command Module Service Manuals Service Manual C_SEQ Manual Descriptions Series C Installation and Getting Started Guide This manual contains step by step instructions for all aspects of plug in module mainframe and command module installation This guide also contains introductory programming information and examples Command Module User s Manual This manual contains programming information for the Command Module and general programming information for instruments installed in the mainframe Mainframe User s Manual This manual contains installation information to prepare the mainframe for use and shows how to install plug in modules Plug In Module User s Manuals These manuals contain plug in module programming and configuration information Each manual contains progr
16. 390 PRINT Testing Channels 32 thru 63 Test Bank B channels 400 PRINT 2 8 Verification Tests Closed channel Resistance Test continued 410 PRINT HI Lines Test 420 PRINT Connect DMM 4 wire connections to test fixture and BANK B 430 GOSUB Cont prog 440 GOSUB Meas Open ch test 450 IF Rdg l E 6 THEN PRINT A relay is stuck closed Troubleshoot separately 460 Resist 3 5 Resistance not to exceed 3 50 470 GOSUB Hi_chans 480 OUTPUT QMux RST 490 PRINT 500 PRINT LO Lines Test 510 PRINT Connect DMM 4 wire connections to Test Fixture LO and BANK B LO 520 GOSUB Cont prog 530 GOSUB Meas Open ch test 540 IF Rdg l E 6 THEN PRINT A relay is stuck closed Troubleshoot separately 550 GOSUB Hi_chans 560 OUTPUT QMux RST 570 PRINT 580 PRINT GUARD Lines Test ud ee Connect DMM 4 wire connections to Test Fixture GUARD and BANK B uard 600 GOSUB Cont_prog 610 GOSUB Meas Open ch test 620 IF Rdg l E 6 THEN PRINT A relay is stuck closed Troubleshoot separately 630 Resist 103 640 GOSUB Hi_chans 650 OUTPUT Mux RST Reset the multiplexer 660 PRINT 670 PRINT 680 690 700 STOP 710 Chan tst Close ch measure it open ch 720 OUTPUT Mux ROUT CLOS 1 amp Ch amp 730 GOSUB Meas 740 PRINT Channel Ch resistance is VALS DROUND Rdg 4 n IF Rdg gt Resist THEN PRINT Channel Ch FAILED the resistance es 760 OUTPUT Mux ROUT OPEN 1 amp
17. D Rdqg 100 4 Ohms 750 PRINT 760 RETURN 770 END 2 14 Verification Tests Test 2 3 DC This test verifies that sufficient DC isolation exists between various points Isolation the relay module The DMM used should be capable of measuring up to at least 1 GQ If the DMM indicates an overload record the reading as gt Rmax where Rmax is the highest resistance that the DMM can measure For example if the DMM is an Agilent 3458A the reading should be recorded as gt 1 2GQ High to Low 1 Hardware Connections see Figure 2 7 Connect the DMM LO to the test fixture s LO lines Connect the DMM HI to the test fixture s HI lines E1476A Test Fixture 1476 See Figure 2 1 HI Lines 5458 Multimeter QSense Input Figure 2 7 DC Isolation Test Connections 2 Equipment Setup Set DMM to 2 wire ohms 1GQ range Send RST to the module to open all relays 3 DC Isolation Reading Trigger the DMM and record the reading Verification Tests 2 15 HI LO to Chassis 4 Hardware Connections see Figure 2 8 Connect the DMM HI to the test fixture s HI and LO lines Connect the DMM LO to any available chassis connection See Figure 2 1 3458A Multimeter Input R HO Figure 2 8 HI Lo to Chassis Isolation Test Connectio
18. LIGIHLIGHILIG HILIGIHIL GIHILIGIHILIGHILIGIHILIGHIL IGIHIL G 252 262 272 282 29253075312 k M Lines Lines HI O Guard Input HI VM Input LO VM Input Guard VM LO BANK A LO BANK A GUARD BANK B H BANK B Guard BANK A H BANK B 032 6339 634 6355 6364 r373 6383 393 740 r 413 6429 7434 H ILIGIHLIGHILIGHILIGIHLIGHLIGHIL GIHILIG HILIGIHILIGIHILIGHIL G HLIGHILIGIHLIGHLIGIHLIGHLIGHLIG 84476452 4467 47 482 497 507 70919 752565330945 257 HILIGIHILIGIHILIGIHIL IGIHILIGIHILIGIHIL IG 587 597 607 617 627 637 VM OHM I HI VM OHM I LO VM OHM I Guard Figure 2 1 Agilent E1476A Test Fixture Wiring 2 2 Verification Tests Functional Verification The Functional Verification Test for the relay module consists of sending the IDN SYST CDES SYST CTYP and TST commands and checking for appropriate responses This test can be used at any time to verify that the device is responding to SCPI commands Procedure 1 Verify that the relay module is installed in the mainframe and that the mainframe has passed its power on test 2 Send the commands to the module see example following 3 Enter the responses After the 5 command the device will return an error code Any non zero error code indicates a self test failure See Table 2 1 for a d
19. Oct 1988 DFARS 252 211 7015 May 1991 or DFARS 252 227 7014 Jun 1995 as a commercial item as defined in FAR 2 101 a or as Restricted computer software as defined in FAR 52 227 19 Jun 1987 or any equivalent agency regulation or contract clause whichever is applicable You have only those rights provided for such Software and Documentation by the applicable FAR or DFARS clause or the Agilent standard software agreement for the product involved Agilent E1476A 64 Channel 3 Wire Relay Multiplexer Service Manual Edition 1 Rev 2 Copyright 1994 2006 Agilent Technologies Inc All Rights Reserved Printing History The Printing History shown below lists all Editions and Updates of this manual and the printing date s The first printing of the manual is Edition 1 The Edition number increments by 1 whenever the manual is revised Updates which are issued between Editions contain replacement pages to correct the current Edition of the manual Updates are numbered sequentially starting with Update 1 When a new Edition is created it contains all the Update information for the previous Edition Each new Edition or Update also includes a revised copy of this printing history page Many product updates or revisions do not require manual changes and conversely manual corrections may be done without accompanying product changes Therefore do not expect a one to one correspondence between product updates and manual updates Edition 1
20. Refer to the Agilent E1476A User s Manual for more information The approximate value of the thermistor is 5kQs the actual value depends on the ambient temperature and self heating caused by the ohmmeter current source The relays used for measuring the thermistor are very unlikely to wear out under normal use The test simply verifies that the thermistor value is approximately 5kQs and the two control relays numbered 93 and 94 are functional The DMM can be used in two wire mode for a functional check or in four wire mode for a more accurate measurement Use the following procedure to check the bank control relays 1 Hardware Connections See Figures 2 1 and 2 5 Table 2 2 lists the connections to make Table 2 2 Bank Control Relays Test Connections Relay 90 91 92 HI Contacts VM INPUT HI VM INPUT HI VM Q I HI BANK A HI BANK B HI BANK B HI LO Contacts VM INPUT LO VM INPUT LO VM BANK A LO BANK B LO BANK B LO Guard Contacts VM INPUT GUARD VM INPUT GUARD VM GUARD BANK A GUARD BANK B GUARD BANK B GUARD E1476A Test Fixture See Figure 2 1 VM Input LO or Guard or VM OHM I HI LO or Guard 3458A Multimeter Input To Bank Terminal on Connector Figure 2 5 Bank Control Relays Test Connections Verification Tests 2 11 Reference Thermistor Test Example Bank Control Relays Resistan
21. amming examples and a complete SCPI command reference for the plug in module Plug In Module Service Manuals These manuals contain plug in module service information Each manual contains information for exchanging the module and or ordering replaceable parts Depending on the module information and procedures for functional verification operation verification performance verification adjustment troubleshooting and repair are also provided Whats in this Manual Manual Overview Manual Content This manual shows how to service the Agilent E1476A 64 Channel 3 Wire Relay Multiplexer Module Consult the Agilent E1476A User s Manual for additional information on installing configuring and operating the module Consult the appropriate mainframe or command module user s manual for information on configuring and operating the mainframe Chapter Title Content 1 General Provides a basic description and lists the test Information equipment required for service 2 D co Verification Functional verification operation verification Tests and performance verification tests 3 Replaceable Replaceable parts lists and illustrations Parts 4 Service Procedures to aid in fault isolation and repair vi Table of Contents Chapter 1 General Information Introduction nc c OR X E s Re UR m RR ROT ES 1 1 Module Description
22. annot be returned for replacement or exchange Replaceable Parts 3 1 Table 3 1 Agilent E1476A Replaceable Parts Reference Agilent Part Qty Part Description Mfr Mfr Part Designator Number Code Number E1476 66501 1 E1476A Relay Module Assembly 28480 E1476 66501 E1476 80000 1 Std Terminal Module 28480 E1476 80000 A1 E1476 66501 1 Relay Module PC Assembly 28480 E1476 66501 F801 2110 0712 1 Fuse Subminiature 4A 125V NTD AX 28480 2110 0712 F802 2110 0665 1 Fuse Subminiature 1A 125V NTD AX 28480 2110 0665 J1 1252 1596 2 Connector Post Type 2 54 Pin Spcg 96 Cont 28480 1252 1596 J2 1252 4743 1 Connector Post Type 2 54 pin spcg 64 Cont 28480 1252 4743 J4 12521596 Connector Post Type 2 54 Pin Spcg 96 Cont 28480 1252 1596 J5 1252 6031 1 Connector Post Type 2 54 Pin Spcg 28480 1252 6031 K300 K315 0490 1674 69 Relay Low Thermal 28480 0490 1674 K416 K431 K532 K547 K648 K663 K790 K794 MP1 E1400 84105 1 External Handle Kit Bottom 28480 E1400 84105 MP2 E1400 84106 1 External Handle Kit Top 28480 E1400 84106 MP3 8160 0686 1 RFI Strip fingers BE CU Tin plated 30817 00786 185 PNL1 E1476 00201 1 Front Panel 28480 E1476 00201 SCR1 SCR2 0515 0368 2 Screw M2 5 x 0 45 12mm long Pan Head 28480 0515 0368 SCR3 SCR8 0515 1135 8 Screw M3 x 0 5 25mm long Flat Head 28480 0515 1135 SCR9 5 10 0515 1375 2 Screw M2 5 x 0 45 6mm long Flat Head 83486 343 300 02506 SCR11 SCR12 0515 1968 2 Screw M2 5 x 0
23. ation is present DO NOT substitute parts or modify equipment Because of the danger of introducing additional hazards do not install substitute parts or perform any unauthorized modification to the product Return the product to an Agilent Technologies Sales and Service Office for service and repair to ensure that safety features are maintained DECLARATION OF CONFORMITY According to ISO IEC Guide 22 and CEN CENELEC EN 45014 Manufacturer s Agilent Technologies Incorporated Manufacturer s Address 815 14 St SW Loveland Colorado 80537 USA Declares that the product Product Name 64 Channel 3 Wire MUX Model Number E1476A Product Options This declaration covers all options of the above product s Conforms with the following European Directives The product herewith complies with the requirements of the Low Voltage Directive 73 23 EEC and the EMC Directive 89 336 EEC including 93 68 EEC and carries the CE Marking accordingly Conforms with the following product standards EMC Standard Limit CISPR 11 1990 EN 55011 1991 Group 1 Class A IEC 801 2 1991 EN 50082 1 1992 4kV CD 8kV AD IEC 801 3 1984 EN 50082 1 1992 3 V m IEC 801 4 1988 EN 50082 1 1992 0 5kV signal lines 1kV power lines The product was tested in a typical configuration with Agilent Technologies or Hewlett Packard Company test systems Safety 1010 1 1990 A1 1992 EN 61010 1 1993 Canada CSA C
24. ce Test 2 12 Verification Tests 2 Equipment Setup Set DMM to 4 wire ohms autorange Send RST to the relay module 3 Sequentially CLOSE each individual relay Send CLOSE 01nn to the module to close channel nn nn is either 90 91 or 92 Trigger the DMM and verify the relay contact resistance Measure the HI LO and Guard contacts of each relay Record the contact resistance in the Performance Test Table at the end of this chapter 4 Open that relay and close the next 5 Hardware Connections See Figures 2 1 and 2 6 To test relay 93 connect the DMM between VM INPUT HI and VM INPUT LO The guard contacts are not tested To test Relay 94 connect the DMM between VM HI and LO The guard contacts not tested 6 Equipment Setup E1476A Test Fixture See Figure 2 1 VM Input or VM OHM I HI 3458A Multimeter Input VM Input LO or VM OHM I LO Figure 2 6 Reference Thermistor Test connections Set DMM to 4 wire ohms autorange Send RST to the relay module 7 Close relay 93 and measure the reference thermistor 8 Open relay 93 and close both relays 92 and 94 Measure the reference thermistor The following program measures the contact resistance of the bank control relays and automatically subtracts 10005 from each reading The program also measures the reference thermistor through
25. escription of self test error codes Example An example follows which uses an HP 9000 Series 300 computer with BASIC and a relay module address of 70914 10 DIM 50 20 OUTPUT 70914 RST IDN Module identification 30 ENTER 70914 A 40 PRINT A 50 OUTPUT 70914 SYST CDES 1 Module Description 60 ENTER 70914 A 70 PRINT A 80 OUTPUT 70914 SYST CTYP 1 Module Type 90 ENTER 70914 A 100 PRINT A 110 OUTPUT 70914 TST Send the self test command 120 ENTER 70914 A Get response 130 PRINT A 140 IF A lt gt 0 THEN 150 REPEAT 160 OUTPUT 70914 SYST ERR 170 ENTER 70914 A A 180 PRINT A A 190 UNTIL NOTA 200 END IF 210 END A typical response is HEWLETT PACKARD S WITCHBOX 0 A 08 00 64 Channel 3 Wire Relay Multiplexer HEWLETT PACKARD E1476A 0 A 08 00 0 Verification Tests 2 3 Self test Error Table 2 1 shows the self test error codes for the multiplexer module The Codes meaning of each code is given in the right hand column If a self test failure occurs cycle power and repeat the test If the problem reoccurs the module may need repair Table 2 1 Self test Error Codes Error Description 0 5501 5502 5503 5505 5510 5511 Self test passed Firmware error Bus error communications problem with card Bad ID information in ID register Hardware and firmware have different relay control register values Possible hardware fault or module programmed via register
26. exer Module See Agilent 75000 Series C Service Documentation page iv in this manual for a list of manuals that describe mainframe command module and hardware operation The information in this manual assumes you are familiar with Agilent E1476A operation If incoming inspection is required see Inspection Shipping later in this manual The Agilent E1476A is a 64 channel 3 wire Relay Multiplexer This means it switches both the high low and guard signal lines for each channel at the same time The module is a VXIbus C size register based slave device See Appendix A Specifications in the Agilent E1476A User s Manual for complete specifications These specifications are the performance standards or limits against which the module may be tested The module should be stored in a clean dry environment Recommended operating storage environments for the module are Temperature Relative Humidity Operating Environment 0 C to 55 C lt 65 0 C to 40 C Storage Shipment 40 C to 75 C lt 65 0 C to 40 C The module is a Safety Class I instrument with a protective earth terminal when installed in an Agilent E1400 series mainframe Check the mainframe and all related documentation for safety markings and instructions before operating or servicing the module General Information 1 1 Module Serial Numbers Serial Number Prefix Figure 1 1 shows the Agilent Technologies serial number structure A
27. gilent E1476A modules covered by this manual are identified by the serial number prefixes listed on the title page Agilent Technologies Serial Numbers XXXX YYYYY Identifies a series of identical instruments Country of Origin A Serial Number Suffix United States Assigned sequentially to each instrument HPSERIAL Figure 1 1 Agilent Technologies Serial Numbers Recommended Test Equipment Table 1 1 lists test equipment recommended to test and service the module Essential requirements for each piece of test equipment are listed in the Requirements column You may substitute other equipment if it meets the requirements in Table 1 1 Table 1 1 Recommended Test Equipment Instrument Requirements Recommended Model Use Controller GPIB GPIB compatibility as defined by IEEE HP 9000 Series 300 F O P T standard 488 1988 and the identical ANSI standard MC1 1 SH1 AH1 T2 TEO L2 LEO SRO RLO PPO DCO DTO and C1 2 3 4 5 Mainframe Compatible with relay multiplexer Agilent E1400B T F O P T Agilent E1401 A T Command Module Compatible with relay multiplexer with Agilent E1405A B F O P T switchbox firmware Agilent E1406A Digital Multimeter 4 wire ohms Agilent 3458A or O P T 2 wire ohms up to 1 GQ Agilent 34401A F Functional Verification Tests O Operational Verification Tests P Performance Verification Tests T Troubleshoot
28. gns of abnormal internally generated heat such as discolored printed circuit boards or components damaged insulation or evidence of arcing Determine and correct the cause of the condition Then perform the Functional Verification Test described in Chapter 2 to verify that the device is functional Service 4 5 Incoming Inspection WARNING 4 6 Service Use the following steps as guidelines to perform initial incoming inspection of the Agilent E1476A To avoid possible hazardous electrical shock do not perform electrical tests if there are signs of shipping damage to the shipping container or to the instrument 1 If the Agilent E1476A is damaged contact Agilent Technologies and the carrier Install the Agilent E1476A in a VXI mainframe Refer to the Agilent E1476A User s Manual and the Agilent Series C Installation and Getting Started Guide for additional information Perform the Functional Verification test and optionally the Performance Verification tests Refer to Chapter 2 in this manual If any of the tests do not pass return the module to Agilent Technologies See Shipping Guidelines later in this chapter If all verification tests pass the module is ready to use Shipping Guidelines Follow the steps in Figure 4 1 to return the relay multiplexer module to a Agilent Technologies Sales and Support Office or Service Center ANTI STATIC A 1 Prepare the module e Remove any user wiring
29. igh Low and Guard lines of the module 10 RE STORE E1476APERF 20 ASSIGN Mux TO 70914 Multiplexer GPIB address 30 ASSIGN Dmm TO 722 DMM GPIB address 40 50 OUTPUT Dmm RESET Reset the DMM 60 OUTPUT Dmm TRIG HOLD Set DMM to trigger hold 70 OUTPUT Dmm FUNC OHMF RANGE AUTO 4 wire ohms 80 90 OUTPUT QMux RST Reset the multiplexer 100 PRINT Testing Channels 0 thru 31 Test Bank A channels 110 PRINT 120 PRINT HI Lines Test 130 PRINT Connect DMM 4 wire connections to test fixture and BANK A HI 140 GOSUB Cont prog 150 GOSUB Meas Open ch test 160 IF Rdg 1E 6 THEN PRINT A relay is stuck closed Troubleshoot separately 170 Resist 3 5 Resistance not to exceed 3 50 180 GOSUB Lo chans 190 OUTPUT QMux RST 200 PRINT 210 PRINT LO Lines Test 220 PRINT Connect DMM 4 wire connections to Test Fixture LO and BANK A LO 230 GOSUB Cont prog 240 GOSUB Meas Open ch test 250 IF Rdg 1 E 6 THEN PRINT A relay is stuck closed Troubleshoot separately 260 GOSUB Lo chans 270 OUTPUT QMux RST 280 PRINT 290 PRINT GUARD Lines Test 300 PRINT Connect DMM 4 wire connections to Test Fixture GUARD and BANK A Guard 310 GOSUB Cont prog 320 GOSUB Meas Open ch test 330 IF Rdg 1 E 6 THEN PRINT A relay is stuck closed Troubleshoot separately 340 Resist 103 Guard relay resistance 350 GOSUB Lo_chans 360 OUTPUT QMux RST Reset the multiplexer 370 PRINT 380 PRINT
30. ing Schematic Diagram 1 2 General Information Figure 1 2 shows the schematic diagram of the Agilent E1476A Relay Multiplexer module Note that this diagram shows lines not shown in the user manual These lines are not available on the user terminal block They are available on the terminal connectors 100 E1476A 64 CHANNEL MULTIPLEXER ANALOG BUS FRONT PANEL CONNECTOR VOLTAGE EDU i Bank Connectors are available on L VM Input Terminal Block Connector only G They are not available on the i Terminal Strips L I c J CURRENT SOURCE BUS ET a e ES m p gt BANK AG TERMINAL BLOCK BANK AL BANK Oo H H ED CHOO OC GIG CH07 o GIG SA CH90 VSA CH sense Ee 08 oo oO HIH 4 LIL CH15 4 o 0 GG gt BANK A o oS LIL CH16 o gt 616
31. ive loads and high inrush currents e g when turning on a lamp or motor reduce relay life Exceeding the specified maximum inputs can cause catastrophic failure Switching Frequency Relay contacts heat up when switched As the switching frequency increases the contacts have less time to dissipate heat The resulting increase in contact temperature reduces relay life A preventive maintenance routine can prevent problems caused by unexpected relay failure The end of the life of a relay can be determined using one or more of the three methods described below The best method or combination of methods as well as the failure criteria depends on the application in which the relay is used Contact Resistance As the relay begins to wear out its contact resistance will increase When the resistance exceeds a pre determined value the relay should be replaced The end of life resistance recommended by Agilent Technologies can be found in Appendix A of the Agilent E1476A User s Manual Stability of Contact Resistance The stability of the contact resistance decreases with age Using this method the contact resistance is measured several 5 10 times and the variance of the measurements is determined An increase in the variance indicates deteriorating performance Number of Operations Alternatively relays can be replaced after a predetermined number of contact closures However this method requires knowledge of the applied load and life
32. m slight parameter degradation to catastrophic failure When handling multiplexer assemblies follow these guidelines to avoid damaging components e Always use a static free work station with a pad of conductive rubber or similar material when handling electronic components Do not use pliers to remove a MOS or CMOS device from a high grip socket Instead use a small screwdriver to pry the device up from one end Slowly lift the device up one pair of pins at a time e After you remove a MOS or CMOS device from a module place the device onto a pad of conductive foam or other suitable holding material e f a device requires soldering be sure the assembly is placed on a pad of conductive material Also be sure that you the pad and the soldering iron tip are grounded to the assembly The etched circuit board in the multiplexer module has plated through holes that allow a solder path to both sides of the insulating material Soldering can be done from either side of the board with equally good results When soldering to any circuit board keep in mind the following guidelines Do not use a high power soldering iron on etched circuit boards as excessive heat may lift a conductor or damage the board Use a suction device or wooden toothpick to remove solder from component mounting holes When using a suction device be sure that the equipment is properly grounded After making repairs to the module inspect the device for any si
33. n Channel Reading Trigger the DMM and record the reading Reading should indicate open circuit indicating all relays are open 4 Sequentially CLOSE each individual relay Send CLOSE 01nn to the module to close channel nn nn has a range of 00 to 63 Trigger the DMM and verify the relay contact resistance Record the contact resistance in the Performance Test Table at the end of this chapter Open that relay and close the next Verification Tests 2 5 Low Lines Test 5 Hardware Connections See Figures 2 1 and 2 3 For channels 0 31 connect the DMM between LO LINES and BANK A LO on the connector For channels 32 64 connect the DMM between LO LINES and BANK B LO on the connector E1476A Test Fixture See Figure 2 1 LO Lines 3458A Multimeter To Bank Terminal on Connector Figure 2 3 Lo Lines Test Connections 6 Equipment Setup Set DMM to 4 wire ohms autorange Send RST to the relay module 7 Open Channel Reading Trigger the DMM and record the reading Reading should indicate open circuit indicating all relays are open 8 Sequentially CLOSE each individual relay Send CLOSE 01nn to the module to open channel nn nn has a range of 00 to 63 Trigger the DMM and verify the relay contact resistance Record the contact resistance in the Performance Test Table at the end of this chapter Open
34. n uninterruptible safety earth ground must be provided from the mains power source to the product input wiring terminals or supplied power cable DO NOT operate the product in an explosive atmosphere or in the presence of flammable gases or fumes For continued protection against fire replace the line fuse s only with fuse s of the same voltage and current rating and type DO NOT use repaired fuses or short circuited fuse holders Keep away from live circuits Operating personnel must not remove equipment covers or shields Procedures involving the removal of covers or shields are for use by service trained personnel only Under certain conditions dangerous voltages may exist even with the equipment switched off To avoid dangerous electrical shock DO NOT perform procedures involving cover or shield removal unless you are qualified to do so DO NOT operate damaged equipment Whenever it is possible that the safety protection features built into this product have been impaired either through physical damage excessive moisture or any other reason REMOVE POWER and do not use the product until safe operation can be verified by service trained personnel If necessary return the product to an Agilent Technologies Sales and Service Office for service and repair to ensure that safety features are maintained DO NOT service or adjust alone Do not attempt internal service or adjustment unless another person capable of rendering first aid and resuscit
35. ns Note Use any convenient chassis connection The illustration shows the DMM LO terminal connected to the the outside of the TRIG OUT SMB on the Agilent E1406A Command Module 5 DC Isolation Reading Trigger the DMM and record the reading 2 16 Verification Tests Performance Test Record Table 2 3 is a form you can copy and use to record performance verification test results for the relay multiplexer Information concerning test limits measurement uncertainty and test accuracy ratio TAR is provided below Test Limits Test limits are defined for closed channel contact resistance and DC isolation using the specifications in Appendix A of the Agilent E1476A User s Manual The closed channel resistance and DC isolation specifications are single sided i e there is an upper limit or a lower limit but not both In the Performance Test Record either the Minimum or Maximum column will be blank Measurement For the performance verification tests in this manual the measurement Unce rtainty uncertainties are based on 90 day accuracy specifications for the Agilent 3458A Digital Multimeter The calculations are shown below Closed channel Conditions Resistance Test e 4 wire ohms function e 10 Orange 90 day specifications e Worst case reading 3 5 Q M U 15 of Reading 5ppm of Range 15x10 3 5 5x10 10 103100 DC Isolation Test Conditions 2 wire ohms function 1 GQ range
36. oducts NO OTHER WARRANTY IS EXPRESSED OR IMPLIED Agilent SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE Exclusive Remedies THE REMEDIES PROVIDED HEREIN ARE BUYER S SOLE AND EXCLUSIVE REMEDIES Agilent SHALL NOT BE LIABLE FOR ANY DIRECT INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES WHETHER BASED ON CON TRACT TORT OR ANY OTHER LEGAL THEORY Notice The information contained in this document is subject to change without notice Agilent Technologies MAKES NO WARRANTY OF ANY KIND WITH REGARD TO THIS MATERIAL INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE Agilent shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing performance or use of this material This document contains proprietary information which is protected by copyright All rights are reserved No part of this document may be photocopied reproduced or translated to another language without the prior written consent of Agilent Technologies Inc Agilent assumes no responsibility for the use or reliability of its software on equipment that is not furnished by Agilent U S Government Restricted Rights The Software and Documentation have been developed entirely at private expense They are delivered and licensed as commercial computer software as defined in DFARS 252 227 7013
37. part number E1476 66501 Check user wiring and test connections Remove dust from relay module and terminal module printed circuit boards 4 2 Service Testing the You can use the tests and checks in Table 4 2 to isolate the problem See Assembly Figures 3 1 and 3 2 in Chapter 3 for locations of mechanical parts Table 4 2 Agilent E1476A Tests Checks Test Check Reference Designator Check Heat Damage Discolored PC boards Damaged insulation Evidence of arcing Switch Settings SP1 LADDR setting SP2 IRQ Level setting Multiplexer PCA F801 F802 Fuse continuity J1 J4 Connector contacts K300 K315 Relay contact resistance K416 K431 K532 K547 K648 K663 K790 K794 Checking for Heat Inspect the assembly for signs of abnormal internally generated heat such as Damage discolored printed circuit boards or components damaged insulation or evidence of arcing Checking Verify that the logical address switch is set correctly factory set at 112 Switches Jumpers Verify that the interrupt priority jumpers are set correctly factory set at Checking the Multiplexer PCA Note level 1 Use the component locators in this manual to check the following e Verify that fuses F801 and F802 are good Check the closed channel resistance of all channel relays using the procedure in Chapter 2 Replace any bad relays Use Table 4 3 to isolate the relay that corresponds to
38. rranty period Agilent Technologies will at its option either repair or replace products which prove to be defective For warranty service or repair this product must be returned to a service facility designated by Agilent Technologies Buyer shall prepay shipping charges to Agilent and Agilent shall pay shipping charges to return the product to Buyer However Buyer shall pay all shipping charges duties and taxes for products returned to Agilent from another country Agilent warrants that its software and firmware designated by Agilent for use with a product will execute its programming instructions when properly installed on that product Agilent does not warrant that the operation of the product or software or firmware will be uninterrupted or error free Limitation Of Warranty The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by Buyer Buyer supplied products or interfacing unauthorized modification or misuse operation outside of the environmental specifications for the product or improper site preparation or maintenance The design and implementation of any circuit on this product is the sole responsibility of the Buyer Agilent does not warrant the Buyer s circuitry or malfunctions of Agilent products that result from the Buyer s circuitry In addition Agilent does not warrant any damage that occurs as a result of the Buyer s circuit or any defects that result from Buyer supplied pr
39. s Interrupt expected but not received Busy bit was not held 9 to 17 msec ss card number with leading zero deleted Agilent E1476A Performance Verification The procedures in this section are used to test the module s electrical performance using the specifications in Appendix A of the Agilent E1476A User s Manual as the performance standards These tests are suitable for incoming inspection troubleshooting and preventive maintenance Note In the following procedures ss represents the switch card number 01 99 of the module A leading zero may be omitted 2 4 Verification Tests Test 2 1 The purpose of this test is to verify that all channel relay contacts meet the Closed channel closed channel resistance specification for the multiplexer If the closed channel resistance of any contact is greater than 3 50 the relay Resistance Test should be replaced High Lines Test 1 Hardware Connections See Figures 2 1 and 2 2 For channels 0 31 connect the DMM between HI LINES and BANK A HI on the connector For channels 32 64 connect the DMM between HI LINES and BANK B HI on the connector 1476 Test Fixture See Figure 2 1 HI Lines 3458A Multimeter To Bank Terminal on Connector Figure 2 2 Hi Lines Test Connections 2 Equipment Setup Set DMM to 4 wire ohms autorange Send RST to the relay module 3 Ope
40. specifications for the applied load The replacement strategy also depends on the application If some relays are used more often or at higher load than the others the relays can be individually replaced as needed If all of the relays see similar loads and switching frequencies the entire circuit board can be replaced when the end of life approaches The sensitivity of the application should be weighed against the cost of replacing relays with some useful life remaining Relays that wear out normally or fail due to misuse should not be considered defective and are not covered by the product s warranty Chapter 2 Verification Tests Introduction Test Conditions Procedures Performance Test Record Verification Test Examples Test Fixture The two levels of test procedures described in this chapter are used to verify that the relay module is fully functional Functional Verification e meets all testable specifications Performance Verification See Table 1 1 for test equipment requirements You should complete the Performance Verification tests at least once a year For heavy use or severe operating environments perform the tests more often It is assumed that the temperature is no greater than 25 C and the relative humidity is no greater than 40 The verification tests assume that the person performing the tests understands how to operate the mainframe the relay module and specified test equipment The te
41. ss90 3 50 1 03E 4 5591 3 50 1 03E 4 ss92 3 50 1 03E 4 5593 typ 5 Oko 1 03 4 ss94 typ 5 Oko 1 03E 4 ss switch card number leading zero may be omitted Single sided specification Minimum does not apply Test Description Minimum Reading Maximum Test 2 3 DC Isolation Test Values in ohms HI to LO 5E8Q HI LO to Chassis 5E8Q ss switch card number leading zero may be omitted Single sided specification Maximum does not apply 2 22 Verification Tests Chapter 3 Replaceable Parts Introduction Ordering Information This chapter contains information for ordering replaceable parts for the Agilent E1476A 64 Channel 3 Wire Multiplexer Module To order a part listed in this chapter specify the Agilent part number and the quantity required Send the order to your nearest Agilent Technologies Sales and Support Office Replaceable Parts List NOTE Table 3 1 lists replaceable parts for the Agilent E1476A See Component Locators Figure 3 1 for locations of parts in Table 3 1 Table 3 3 shows reference designators for parts in Table 3 2 and Table 3 4 shows the manufacturer code list for the parts If defect can be traced to a fuse or replaceable mechanical part replace the fuse and or part and retest the module If the defect cannot be traced to a fuse or replaceable mechanical part replace the entire module Individual printed circuit assemblies PCAs c
42. st procedures do not specify equipment settings for test equipment except in general terms It is assumed that a qualified service trained technician will select and connect the cables adapters and probes required for the test The results of each Performance Verification test may be recorded in the Performance Test Record Table 2 3 You can make a copy of this form if desired Each verification test procedure includes an example program that performs the test All example programs assume the following controller is an HP 9000 Series 200 300 computer programming language is BASIC relay module address is 70914 logical address switches 112 relay module card number is 1 DMM is an Agilent 3458A A test fixture is required for the Performance Verification tests A test fixture can be manufactured from a standard Agilent E1476A terminal module It is recommended that you order an extra terminal module to use as a test fixture The terminal module part number is E1476 80001 Figure 2 1 shows how the test fixture should be wired Use 24AWG wire when making the test fixture Verification Tests 2 1 NOTE Use 24AWG wire or smaller to wire between terminal Larger gauge wires will not fit in the terminals 003 6014 7023 034 7045 6054 70063 7073 7084 F091 10 114 HLIGHILIGHLIGHLIGHLIGHLGHLIG 512251325147 1527 162 41774187 019562006214 722472347244 H ILIGIHLIGHILIGHI
43. that relay and close the next 2 6 Verification Tests Guard Lines Test 9 Hardware Connections See Figures 2 1 and 2 4 For channels 0 31 connect the DMM between GUARD LINES and BANK A GUARD on the connector For channels 32 64 connect the DMM between GUARD LINES and BANK B GUARD on the connector E1476A Test Fixture See Figure 2 1 Guard Lines k 5458A Multimeter Sense Input To Bank Terminal on Connector Figure 2 4 Guard Lines Test Connections 10 Equipment Setup Set DMM to 4 wire ohms autorange Send RST to the relay module 11 Open Channel Reading Trigger the DMM and record the reading Reading should indicate open circuit indicating all relays are open 12 Sequentially CLOSE each individual relay Send CLOSE 01nn to the module to close channel nn nn has a range of 00 to 63 Trigger the DMM and verify the relay contact resistance Record the contact resistance in the Performance Test Table at the end of this chapter Note Guard Relay contacts have either one or two 50Q resistors in series with the contacts Consequently the measurement will reflect the value of the resistor s 13 Open that relay and close the next Verification Tests 2 7 Example Closed channel This example performs the Closed channel Resistance Test for the Resistance Test Agilent E1476A This example can be used to test the H
44. uld first identify the problem and then isolate the cause using the component locators and schematics in this manual Table 4 1 lists some common problems along with symptoms and possible solutions If the problem persists perform component level troubleshooting using the component locators and schematics Service 4 1 Table 4 1 Agilent E1476A Common Problems Problem Type Symptom Possible Solutions Self test Errors Non zero error code in response to the TST command See Table 2 1 for information on self test errors Operator Errors Non zero error code in response to the SYST ERR command See the Agilent E1476A User s Manual for multiplexer errors and causes See Appendix B of the Agilent E1405 User s Manual or Agilent E1406 User s Manual for additional information on operator errors Catastrophic Failures Not responding to commands Check logical address setting Check GPIB cables and connections See Testing the Assembly in this chapter Performance Out of Specification Failing Closed channel Resistance Test see Test 2 1 and Test 2 2 in Chapter 2 Failing DC Isolation Test see Test 2 3 in Chapter 2 Check user wiring and test connections Replace relays that correspond to the channels that are failing see Table 4 3 If most of the channels are near or above the test limit 3 5 Q replace the entire printed circuit board Agilent
45. urer s Mfr Manufacturer s Manufacturer s Zip Code Name Address Code 28480 Agilent Technologies Inc Corporate Palo Alto CA 94304 30817 Instrument Specialties Co Inc Del Water Gap PA 18327 83486 Elco Tool and Screw Corp Rockford IL 61125 Chapter 4 Service Introduction WARNING Equipment Required Service Aids This chapter contains service information for the Agilent E1476A 64 Channel 3 Wire Relay Multiplexer module including troubleshooting techniques and repair maintenance guidelines Do not perform any of the service procedures shown unless you are a qualified service trained technician and have read the WARNINGS and CAUTIONS in Chapter 1 Equipment required for multiplexer matrix troubleshooting and repair is listed in Table 1 1 Recommended Test Equipment Any equipment that satisfies the requirements given in the table may be substituted To avoid damage to the screw head slots use a T8 Torx driver to remove the front panel handles and a T10 Torx driver to remove the shields See Chapter 3 for descriptions and locations of Agilent E1476A replaceable parts Service notes manual updates and service literature for the modules may be available through Agilent Technologies For information contact your nearest Agilent Technologies Sales and Support Office Troubleshooting Identifying the Problem To troubleshoot an Agilent E1476A multiplexer problem you sho

E1476A 64-Channel 3-Wire Relay Multiplexer Module Service Manual

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