Keysight Technologies E1460A Service Manual
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Keysight Technologies E1460A Service Manual

Keysight Technologies E1460A Service Manual

64-channel relay multiplexer
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75000 Series C
Service Manual
Keysight E1460A 64-Channel
Relay Multiplexer

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  • Page 1 75000 Series C Service Manual Keysight E1460A 64-Channel Relay Multiplexer...
  • Page 3 WITHOUT NOTICE, IN FUTURE EDI- without prior agreement and written con- www.keysight.com/find/E1460A TIONS. FURTHER, TO THE MAXIMUM sent from Keysight Technologies, Inc. as EXTENT PERMITTED BY APPLICABLE (product-specific information and sup- governed by United States and interna- LAW, KEYSIGHT DISCLAIMS ALL WAR- port, software and documentation tional copyright laws.
  • Page 4 If necessary, return instrument chassis and cover must be safe operating conditions, modules the product to a Keysight Technologies connected to an electrical ground to should not be operated beyond the full Sales and Service Office for service and minimize shock hazard.
  • Page 5 Safety Symbols A CAUTION denotes a hazard. It calls attention to an operating pro- cedure or practice, that, if not cor- rectly performed or adhered to could result in damage to the product or loss of important data. Do not proceed beyond a CAUTION notice until the indicated condi- tions are fully understood and met.

  • Page 7: Table Of Contents

    Self-test Error Codes......... . . 24 Keysight E1460A Performance Verification ......25 Test 2-1: Closed-channel Resistance Test .
  • Page 8 Test 2-3: DC Isolation ......... . 74 Keysight E1460A 64-Channel Relay Multiplexer Service Guid...

  • Page 9: General Information

    Keysight E1460A 64-Channel Relay Multiplexer Service Guide General Information Introduction This manual contains information required to test, troubleshoot, and repair the Keysight E1460A relay multiplexer module (see Figure 1-1). Figure 1-1 Keysight E1460A Relay Multiplexer Module...

  • Page 10: Relay Life

    When the resistance exceeds a pre-determined value, the relay should be replaced. The end-of-life resistance recommended by Keysight Technologies can be found in Appendix A of the Keysight E1460A User’s Manual. Stability of Contact Resistance. The stability of the contact resistance decreases with age.
  • Page 11 Relay Life General Information Relays that wear out normally or fail due to misuse should not be considered defective and are not covered by the product’s warranty. Keysight E1460A 64-Channel Relay Multiplexer Service Guide...

  • Page 12: Safety Considerations

    Warnings and Cautions This section contains WARNINGS which must be followed for your protection and CAUTIONS which must be followed to avoid damage to the equipment when performing instrument maintenance or repair. Keysight E1460A 64-Channel Relay Multiplexer Service Guide...
  • Page 13 Energy available at many points may, if contacted, result in personal injury. (If maintenance can be performed without power applied, the power should be removed.) Keysight E1460A 64-Channel Relay Multiplexer Service Guide...
  • Page 14 40 VA. STATIC ELECTRICITY. Static electricity is a major cause of component failure. To prevent damage to the electrical components in the multiplexer, observe anti-static techniques whenever working on the device. Keysight E1460A 64-Channel Relay Multiplexer Service Guide...

  • Page 15: Incoming Inspection

    1 If the Keysight E1460A is damaged, contact Keysight Technologies and contact the carrier. 2 Install the Keysight E1460A in a VXI mainframe. Refer to the Keysight E1460A User Manual and the Keysight Series C Installation and Getting Started Guide for additional information.
  • Page 16 – Send carton to Keysight Technologies. We recommend that you use the same shipping materials as those used in factory packaging (available from Keysight Technologies). For other (commercially-available) shipping materials, use a double-wall carton with minimum 2.4 MPa (350 psi) test.

  • Page 17: Environment

    C to +40 Shipment Multiplexer Description The Keysight E1460A 64-channel relay multiplexer module is an “ instrument” in the slot of a VXIbus mainframe. Each module is assigned an error queue, input and output buffers, and a status register. Instruments are based on the logical addresses of the plug-in modules.

  • Page 18: Schematics/ Component Locators

    Digital Multimeter 4-wire ohms Keysight 3458A or O,P,T 2-wire ohms (up to 1 GΩ) Keysight 34401A * F = Functional Verification, O = Operation Verification Tests, P = Performance Verification Tests, T = Troubleshooting Keysight E1460A 64-Channel Relay Multiplexer Service Guide...

  • Page 19: Verification Tests

    Keysight E1460A 64-Channel Relay Multiplexer Service Guide Verification Tests Introduction The two levels of test procedures described in this chapter are used to verify that the relay multiplexer module: – is fully functional (Functional Verification); – meets all testable specifications (Performance Verification).

  • Page 20: Test Fixture

    E1460-80001. Figure 2-1 shows how the test fixture should be wired. If you are using an Keysight E1460A terminal block, and some or all of the relay module jumpers have been removed, you should add the following connections to the test fixture shown in Figure 2-1: 1.

  • Page 21: Functional Verification

    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 END A typical response is: HEWLETT-PACKARD,SWITCHBOX,0,A.04.00 64-CHANNEL RELAY MULTIPLEXER HEWLETT-PACKARD,E1460A,0,A.04.00 +0 Keysight E1460A 64-Channel Relay Multiplexer Service Guide...

  • Page 22: Self-Test Error Codes

    Bus error (communications problem with card). +ss03 Bad ID information in ID register. +ss10 Interrupt expected but not received. +ss11 Busy bit was not held ≈9 to 17 msec., *ss = card number (with leading zero deleted) Keysight E1460A 64-Channel Relay Multiplexer Service Guide...

  • Page 23: Keysight E1460A Performance Verification

    Keysight E1460A Performance Verification The procedures in this section are used to test the multiplexer’s electrical performance using the specifications in Appendix A of the Keysight E1460A User’s Manual as the performance standards. These tests are suitable for incoming inspection, troubleshooting, and preventive maintenance.
  • Page 24 5 Closed- and Open-channel Readings (channels 01-77) – Repeat steps 3 and 4 for all 64 channels listed in the Performance Test Record for the Keysight E1460A (Table 2-1). Use CLOS (@ssbc) and OPEN (@ssbc), where: ss = card number (01-99, leading zero not necessary)

  • Page 25: Example: Closed-Channel Resistance Test

    This example performs the Closed-channel Resistance Test for the Keysight E1460A. If the switch card number is not 1, change the value in line 40 to the correct number. This example can be used to test the High or Low lines of the module.
  • Page 26 260 OUTPUT @Dmm;"TRIG SGL" !Trigger DMM 270 ENTER @Dmm;Rdg 280 PRINT VAL$(DROUND(Rdg,4)) 290 NEXT J 300 NEXT I 310 ! 320 ! 330 OUTPUT @Dmm;"RESET" 340 LOCAL @Dmm 350 OUTPUT @Mux;"*RST" 360 END Keysight E1460A 64-Channel Relay Multiplexer Service Guide...

  • Page 27: Test 2-2. Testing Control Relays

    Test 2-2. Testing Control Relays The E1460-66201 relay module has seven control relays (numbered 0990 to 0996). See the Keysight E1460A User’s Manual for information about the use of these relays. There is no simple method for testing all of these control relays, and they are unlikely to wear out under normal use.

  • Page 28: Example: Control Relay Test

    *** ss = switch card number (leading zero may be omitted) Example: Control Relay Test This example program tests the tree relays on the Keysight E1460A relay multiplexer module. If the switch card number is not 1, change the value in line 50 to the correct number.
  • Page 29 PRINT TAB(5);"Connect dvm HI to ;"Chan_data$(I,2);" and dvm LO to ";Chan_data$(I,3) GOSUB Open_ch PRINT I=I+1 PRINT "Testing channel ";Chan_num;" ";Chan_data$(I,1) PRINT TAB(5);"Connect dvm HI to ;"Chan_data$(I,2);" and dvm LO to ";Chan_data$(I,3) GOSUB Close_ch PRINT I=I+1 Keysight E1460A 64-Channel Relay Multiplexer Service Guide...
  • Page 30 LO to ";Chan_data$(I,3) GOSUB Close_ch PRINT PRINT "END OF TESTS" CLEAR SCREEN I=990 FOR J=1 TO 12 STEP 2 PRINT "Channel: ";I;Chan_data$(J,1);Chan_data$(J,4);" Ohms" PRINT TAB(15);Chan_data$(J+1,1);Chan_data$(J+1,4);" Ohms" PRINT I=I+1 NEXT J PRINT "Channel: 996";TAB(18);Chan_data$(13,4);" Ohms" STOP Keysight E1460A 64-Channel Relay Multiplexer Service Guide...
  • Page 31 920 PRINT TAB(5);Channel ";Chan_num;" measures "; VAL$(DROUND(Rdg,4)) 930 Chan_data$(I,4)=VAL$(Rdg) 940 RETURN 950 Check: ! 960 REPEAT 970 OUTPUT @Mux;"SYST:ERR?" 980 ENTER @Mux;Code,Message$ 990 PRINT Code,Message$ 1000 UNTIL NOT Code 1010 RETURN 1020 END Keysight E1460A 64-Channel Relay Multiplexer Service Guide...

  • Page 32: Test 2-3: Dc Isolation Test

    – Set DMM to: 2-wire ohms, 1 GΩ range. – Send *RST to the multiplexer to open all channel relay contacts. 3 DC Isolation Reading – Trigger the DMM and record the reading. High & Low to Chassis 4 Hardware Connections Keysight E1460A 64-Channel Relay Multiplexer Service Guide...

  • Page 33: Example: Dc Isolation Test

    – Trigger the DMM and record the reading. Example: DC Isolation Test This example performs the DC Isolation Test for the Keysight E1460A. If the switch card number is not 1, change the value in line 40 to the correct number.
  • Page 34 340 OUTPUT @Dmm;"TRIG SGL" 350 ENTER @Dmm;Rdg 360 PRINT "DC Isolation -- High and Low lines to Chassis = ";Rdg 370 PRINT 380 ! 390 OUTPUT @Dmm;"RESET" 400 LOCAL @Dmm 410 OUTPUT @Mux;"*RST" 420 END Keysight E1460A 64-Channel Relay Multiplexer Service Guide...

  • Page 35: Performance Test Record

    Test Limits Test limits are defined for closed-channel contact resistance and DC isolation using the specifications in Appendix A of the Keysight E1460A 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.

  • Page 36: Test Accuracy Ratio (Tar)

    Test Accuracy Ratios are not defined for single-sided measurements, so all closed-channel resistance and DC isolation measurements have ’NA’ (Not Applicable) in the TAR column. Table 2-4 Performance Test Record for the E1460A (Page 1 of 5) Test Facility: Name ________________________________ Report No. _______________________...
  • Page 37 Performance Test Record Verification Tests Table 2-3. Performance Test Record for the E1460A (Page 2 of 5) Model _______________Report No. ________________Date ______________ Test Equipment Used: Description Model No. Trace No. Cal Due Date Keysight E1460A 64-Channel Relay Multiplexer Service Guide...
  • Page 38 Verification Tests Performance Test Record Table 2-5 Performance Test Record for the E1460A (Page 3 of 5) Model _______________Report No. ________________Date ______________ Channel* Minimum** Low Lines High Lines Maximum Meas Reading Reading Uncert Test 2-1. Closed-channel Resistance Test (Values in ohms) ss00 1.03E-4...
  • Page 39 Performance Test Record Verification Tests Table 2-6 Performance Test Record for the E1460A (Page 4 of 5) Model _______________Report No. ________________Date ______________ Channel* Minimum** Low Lines High Lines Maximum Meas Reading Reading Uncert Test 2-1. Closed-channel Resistance Test (Values in ohms) ss40 1.03E-4...
  • Page 40 Verification Tests Performance Test Record Table 2-7 Performance Test Record for the E1460A (Page 5 of 5) Model _______________Report No. ________________Date ______________ Channel* Minimum** Low Lines High Lines Maximum Meas Reading Reading Uncert Test 2-2. Tree Relay Test (Values in ohms) ss0990 NC 1.03E-4...

  • Page 41: Replaceable Parts

    E1460A relay multiplexer module. Ordering Information To order a part listed in this chapter, specify the Keysight part number and the quantity required. Send the order to your nearest Keysight Technologies Sales and Support Office. Replaceable Parts List See the table below for the contents of each table in this chapter. Any applicable illustrations are listed in the right-hand column.
  • Page 42 28480 1460-2552 Top Lever 1460-2553 28480 1460-2552 Bottom Lever E1400-45103 28480 E1400-45103 E1400-45104 28480 E1400-45104 Note: The part number for a complete terminal module is E1460-80011. Figure 3-7 E1400-80011 Terminal Module Case Assembly Keysight E1460A 64-Channel Relay Multiplexer Service Guide...
  • Page 43 Clamp strain relief Terminal housing - bottom 28480 E1300-01202 Terminal housing - top E1400-44104 28480 E1400-44104 E1400-44105 28480 E1400-44105 Note: The part number for a complete terminal module is E1460-80001. Figure 3-8 E1400-80001 Terminal Module Case Assembly Keysight E1460A 64-Channel Relay Multiplexer Service Guide...
  • Page 44 Terminal block 12 pos. polyamide 28480 0360-2391 TB14-TB16 0360-2501 Terminal block polyester 30035 BB-125-10 Note: The part number for a complete terminal module is E1460-80011 or E1460-80001. Figure 3-9 E1460A Terminal Module (E1460-66510) Keysight E1460A 64-Channel Relay Multiplexer Service Guide...
  • Page 45 Replaceable Parts List Replaceable Parts Table 3-11Keysight E1460A Option A3E Terminal Module Replaceable Parts Reference Keysight Part Part Description Mfr. Mfr. Part Code Designator Number Number SCR1-SCR4 0515-0905 Screw Pan Head M2.5 x 06PZ Female Connector 28480 0515-0905 Housing P1-P2...
  • Page 46 Screw-M3 X 0.5 25mm-long flat-hd SCR3-SCR8 0515-1135 28480 0515-1135 Shield; bottom shield for multiplexer SHD1 E1460-00602 28480 E1460-00602 Shield; top shield for multiplexer SHD2 E1460-00603 28480 E1460-00603 Figure 3-11 ME1460A Relay Module Mechanical Parts Keysight E1460A 64-Channel Relay Multiplexer Service Guide...
  • Page 47 Screw-M2.5 X 0.45 11mm-long pan-hd SCR11-SCR12 0515-1968 28480 0515-1968 Shield; bottom shield for multiplexer SHD1 E1460-00602 28480 E1460-00602 Shield; top shield for multiplexer SHD2 E1460-00603 28480 E1460-00603 Figure 3-12 E1460-66201 Relay Module Mechanical Parts Keysight E1460A 64-Channel Relay Multiplexer Service Guide...
  • Page 48 Resistor 4.87K ±1% 1⁄8W TF TC=0+-100 24546 CT4-1/8-T0-1002-F 0757-0453 Resistor 30.1K ±1% 1⁄8W TF TC=0+-100 24546 CT4-1/8-T0-2003-F R12-15 0757-0442 Resistor 10K ±1% 1⁄8W TF TC=0+-100 24546 R16-R19 0757-0472 Resistor 200K ±1% 1⁄8W TF TC=0+-100 24546 Keysight E1460A 64-Channel Relay Multiplexer Service Guide...
  • Page 49 CMOS/HC D-Type Pos-Edge-Trig COM Transistor 04713 74HC175N 1858-0069 ARRAY 18-Pin 56289 ULN-2803A U27-U28 1820-3146 IC FF CMOS/HC D-Type Pos-Edge-Trig COM 04713 MC74HC175N U29-U32 1820-4599 IC-Interface Driver Misc/Unknown NAND 56289 UDN-2543B XJM3 1258-0247 Jumper 4-position 22526 69146-204 Keysight E1460A 64-Channel Relay Multiplexer Service Guide...
  • Page 50 Replaceable Parts Replaceable Parts List Figure 3-13 Relay Module Component Locator Keysight E1460A 64-Channel Relay Multiplexer Service Guide...
  • Page 51 J ....electrical connector (jack) SHD ..........shield JM ..........jumper SW ..........switch K ........... relay TB ........terminal block L ..........inductor U ........ integrated circuit MP ......mechanical part XJM......removable jumper Keysight E1460A 64-Channel Relay Multiplexer Service Guide...
  • Page 52 Replaceable Parts Replaceable Parts List Keysight E1460A 64-Channel Relay Multiplexer Service Guide...

  • Page 53: Service

    T10 Torx driver to remove the shields. Service Aids See Chapter 3 for descriptions and locations of Keysight E1460A replaceable parts. Component locators and schematics are included with this manual. Service notes, manual updates, and service literature for the modules may be available through Keysight Technologies.

  • Page 54: Troubleshooting

    Service Troubleshooting Troubleshooting To troubleshoot an Keysight E1460A multiplexer problem, you should first identify the problem, and then isolate the cause using the component locators and schematics in this manual. Identifying the Problem Table 4-1 lists some common problems, along with symptoms and possible solutions.

  • Page 55: Testing The Assembly

    – Check connectors P1 and J1 for damage. If the preceding steps fail to isolate the problem, use the schematics in this manual to perform component-level troubleshooting. Keysight E1460A 64-Channel Relay Multiplexer Service Guide...

  • Page 56: Matching Relays To Channels

    Use Table 4-3 to find the reference designator of any relay on the E1460-66502 relay module. Table 4-20Channel Relays/Reference Designators E1460A Channel Relay E1460A Channel Relay Ref. Designator Ref. Designator Bank Channel Bank Channel Keysight E1460A 64-Channel Relay Multiplexer Service Guide...
  • Page 57 Troubleshooting Service Table 4-20Channel Relays/Reference Designators (continued) Control Relays Channel Ref. Designator Channel Ref. Designator 0990 0994 0991 0995 0992 0996 0993 Keysight E1460A 64-Channel Relay Multiplexer Service Guide...

  • Page 58: Disassembly

    A1. – Lift A1 off of the bottom shield. To remove the front panel and front panel handles: – Remove the two T8 Torx screws as shown. Figure 14 ME1460A Relay Module Disassembly Keysight E1460A 64-Channel Relay Multiplexer Service Guide...

  • Page 59: Repair/ Maintenance Guidelines

    – 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. Keysight E1460A 64-Channel Relay Multiplexer Service Guide...

  • Page 60: Post-Repair Safety Checks

    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. Keysight E1460A 64-Channel Relay Multiplexer Service Guide...

  • Page 61: Component Locators And Schematic Diagrams

    Component Assembly - Relay Interface & Drive Component S-E1460-66502(5) Assembly - Analog & Configuration Bus Component Assembly - E1460-66502 S-E1460-66502(6) Channels 00-37 E1460-66502 S-E1460-66502(7) Component Assembly - Channels 40-77 E1460-66502 S-E1460-66510 64-Channel Relay Multiplexer Terminal Card E1460-66510 Keysight E1460A 64-Channel Relay Multiplexer Service Guide...
  • Page 62 Service Component Locators and Schematic Diagrams Keysight E1460A 64-Channel Relay Multiplexer Service Guide...

  • Page 63: A Verification Tests - C Programs

    *TST? command and checking the response. /* Self Test E1460A This program performs the Self Test found in the E1460A Service Manual Program Rev. A.01.00 7/1/96 */ #include <stdio.h> #include <sicl.h> #define ADDR "hpib7,9,14"/* Address of device */ void main () INST id;/* Define id as an instrument */...
  • Page 64 Verification Tests - C Programs Functional Verification Test ipromptf (id, "SYST:ERR?\n", "%t", a); printf ("\n %s", a); while (a[1] != ’0’); iclose (id);/* Close instrument session */ Keysight E1460A 64-Channel Relay Multiplexer Service Guide...

  • Page 65: Performance Verification Tests

    ("\n\n 1. Turn Mainframe AND hp 3458a DMM power OFF."); printf ("\n 2. Connect GPIB Cable between mainframe and DMM."); printf ("\n 3. Install Keysight E1460A Component Assembly into Mainframe."); printf ("\n 4. Attach Test Fixture to Component Assembly.");...
  • Page 66 ("\n\nMeasurements complete for High lines."); printf ("\ nPress ENTER for Low measurements"); getchar (); /*......Low Lines.....*/ printf ("\n\nLow to Common Measurements"); printf ("\n\n 1. Connect DMM Input HI lead to Low lines"); Keysight E1460A 64-Channel Relay Multiplexer Service Guide...
  • Page 67 = %.4e Ohms", result2); if (result < 3.5) printf ("\n*** Resistance for Channel %u%u is < 3.5 Ohms ***", i,j); printf ("\n\nMeasurements complete for Low lines."); iprintf (id, "*RST\n"); iclose (id);iclose (dm);/* Close instrument session */ Keysight E1460A 64-Channel Relay Multiplexer Service Guide...

  • Page 68: Test 2-2: Testing Control Relays

    This program performs the control relays test found in Chapter 2 - Verification Tests. See Chapter 2 for a detailed description of this test and equipment connections. /* Closed-channel Resistance Test E1460A This program performs the Control Relay Test found in the E1460A Service Manual Program Rev. A.01.00 7/1/96 */ #include <stdio.h>...
  • Page 69 Performance Verification Tests Verification Tests - C Programs printf ("\n 3. Install Keysight E1460A Component Assembly into Mainframe."); printf ("\n 4. Attach Test Fixture to Component Assembly."); printf ("\n 5. Turn Mainframe and DMM power ON"); printf ("\n 6. Press ENTER when ready to begin testing.");...
  • Page 70 (id, "CLOS (@10%u)\n", channel); iprintf (dm, "TRIG SGL\n"); iscanf (dm, "%lf", &result[i]); iscanf (dm, "%t", cr); iprintf (id, "OPEN (@10%u)\n", channel); printf ("\nChannel %u %s measures %.4e Ohms", channel, data[i][0], result[i]); i++; channel = 996; Keysight E1460A 64-Channel Relay Multiplexer Service Guide...
  • Page 71 ("\nChannel: %u %s = %.4e Ohms", channel, data[i][0], result[i]); printf ("\n%s = %.4e Ohms", data[i+1][0], result[i+1]); channel++; printf ("\nChannel: 996 %s = %.4e Ohms", data[12][0], result[12]); iprintf (id, "*RST\n"); iclose (id);iclose (dm);/* Close instrument session */ Keysight E1460A 64-Channel Relay Multiplexer Service Guide...

  • Page 72: Test 2-3: Dc Isolation

    This test verifies that sufficient DC isolation exists between various points on the multiplexer. See Chapter 2 for hardware connections and equipment setup. /* DC Isolation Test E1460A This program performs the DC Isolation Test found in the E1460A Service Manual Program Rev. A.01.00 7/1/96 */ #include <stdio.h>...
  • Page 73 Verification Tests - C Programs printf ("\nDC Isolation -- High and Low Lines to Chassis"); printf ("\n R = %s Ohms", reading); iprintf (id, "*RST\n"); iclose (id);/* Close instrument session */ iclose (dm); Keysight E1460A 64-Channel Relay Multiplexer Service Guide...
  • Page 74 Verification Tests - C Programs Performance Verification Tests Keysight E1460A 64-Channel Relay Multiplexer Service Guide...
  • Page 76 This information is subject to change without notice. © Keysight Technologies, 1996-2019 Printed in Malaysia Edition 4, October 2019 *E1460-90012* E1460A-90012 www.keysight.com...

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