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Agilent Technologies E1346A Service Manual

48-channel relay multiplexer agilent 75000 series b
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Agilent E1346A
48-Channel Relay Multiplexer
Service Manual
Enclosed is the Service Manual for the Agilent E1346A
48-Channel Relay Multiplexer. Insert this manual, along
with any other VXIbus manuals that you have, into the binder
that came with your Agilent Technologies mainframe.
*E1346-90011*
Manual Part Number: E1346-90011
Printed in Malaysia E0706
Agilent 75000 Series B

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Summary of Contents for Agilent Technologies E1346A

  • Page 1 Agilent E1346A 48-Channel Relay Multiplexer Service Manual Enclosed is the Service Manual for the Agilent E1346A 48-Channel Relay Multiplexer. Insert this manual, along with any other VXIbus manuals that you have, into the binder that came with your Agilent Technologies mainframe.
  • Page 3 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 products.
  • Page 4 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.
  • Page 5 Mainframe User’s Manual. This manual contains programming information for the mainframe, front panel operation information (for the Agilent E1301B mainframe), and general programming information for instruments installed in the mainframe. Plug-In Module User’s Manuals. These manuals contain plug-in module programming and configuration information.

  • Page 6: Manual Overview

    What’s in this Manual Manual Overview This manual shows how to service the Agilent E1346A Single Ended Relay Multiplexer. Consult the Agilent E1346A User’s Manual for additional information on installing, configuring, and operating the Agilent E1346A. Consult the appropriate mainframe user’s manual for information on configuring and operating the mainframe.

  • Page 7: Table Of Contents

    Agilent E1346A Description ........
  • Page 8 Service Aids ..........4-1 Agilent E1346A Multiplexer Description ....... . . 4-2 Troubleshooting Techniques .

  • Page 9: Chapter 1 - General Information

    Introduction This manual contains information required to test, troubleshoot, and repair the Agilent E1346A Single Ended Relay Multiplexer. See the Agilent E1346A User’s Manual for additional information on the Agilent E1346A. Figure 1-1 shows the Agilent E1346A Single Ended Relay Multiplexer.

  • Page 10: Safety Considerations

    Safety This product is a Safety Class I instrument that is provided with a protective Considerations earth terminal when installed in the mainframe. Check the mainframe, multiplexer, and all related documentation for safety markings and instructions before operation or service. Refer to the WARNINGS page (page iii) in this manual for a summary of safety information.

  • Page 11: Cautions

    WARNING USING AUTOTRANSFORMERS. If the mainframe is to be energized via an autotransformer (for voltage reduction) make sure the common terminal is connected to neutral (that is, the grounded side of the main’s supply). CAPACITOR VOLTAGES. Capacitors inside the mainframe may remain charged even when the mainframe has been disconnected from its source of supply.

  • Page 12: Relay Life

    Check Contact Resistance. As a relay begins to wear out, its contact resistance will increase. When the resistance exceeds a pre-determined value, the relay should be replaced. Typically, a relay for the Agilent E1346A Multiplexer should be replaced when the contact resistance exceeds 2.0 .

  • Page 13: Replacement Strategy

    Replacement 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 Strategy 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.

  • Page 14: Multiplexer Description

    NOTE Instruments are based on the logical addresses of the plug-in modules. See the Agilent 75000 Series B Installation and Getting Started Guide to set the addresses to create an instrument. E1346A The Agilent E1346A Single Ended Relay Multiplexer provides switching (multiplexing) of up to 48 channels (i.e., channels 00 to 47).

  • Page 15: Multiplexer Serial Numbers

    Multiplexer Multiplexers covered by this manual are identified by a serial number prefix listed on the title page. Agilent Technologies uses a two-part serial number Serial Numbers in the form XXXXAYYYYY, where XXXX is the serial prefix, A is the country of origin (A=USA), and YYYYY is the serial suffix.

  • Page 16: Recommended Test Equipment

    F,O, E1301B, E1302A or E1401B/T, E1421A/B (requires E1405A/B) Digital Multimeter Agilent 3458A or O,P,T 2-wire ohms (up to 1 G ) Agilent 34401A 4-wire ohms * F = Functional Verification, O = Operation Verification Tests, P = Performance Verification Tests, T = Troubleshooting...

  • Page 17: General Information

    Notify Agilent and carrier. Notify Agilent Return Multiplexer to Agilent Figure 1-2. Initial (Incoming) Inspection Guidelines 1-9 General Information...

  • Page 18: Shipping Guidelines

    Shipping Follow the steps in Figure 1-3 to return a relay multiplexer to a Agilent Technologies Sales and Support Office or Service Center. Guidelines 1 Prepare the Multiplexer Remove user wiring from terminal block Attach tag to module/pod that identifies...

  • Page 19: Chapter 2 - Verification Tests

    Verification Tests Introduction This chapter describes the verification tests for the Agilent E1346A Single Ended Relay Multiplexer. The three levels of test procedures described in this chapter are used to verify that the Agilent E1346A: is functional (Functional Verification Test)

  • Page 20: Functional Verification Test

    Functional The Functional Verification Test for the Agilent E1346A Single Ended Verification Relay Multiplexer consists of sending the *IDN? command and checking the response. This test can be used to verify that the multiplexer is Test connected properly and is responding to a basic command.

  • Page 21: Performance Verification Tests

    Wiring the A test fixture is required for the performance verification tests. Figure 2-1 shows typical connections using an Agilent E1346A terminal block for the Test Fixture test fixture. You may want to order an extra terminal block to use as a test fixture, so that you don’t have to re-wire each time the tests are performed.

  • Page 22: Test 2-1: Closed Channel Resistance Test

    To measure the protection resistor values, set the Agilent 3458A DMM to 4-wire ohms, autorange and measure each resistor value with the DMM (see Figure 2-2).
  • Page 23 Table 2-1. Measured Protection Resistor Values Resistor Resistor Measured Value ( ) Measured Value ( ) ________________ ________________ ________________ ________________ ________________ ________________ Chs 00-47 and 90-92 HI Measurements Make Hardware Connections Turn mainframe power OFF Connect DMM leads as shown in Figure 2-3 Turn mainframe power ON Figure 2-3.
  • Page 24 Ch 90-92 LO Measurements Make Hardware Connections Turn mainframe power OFF Connect DMM leads as shown in Figure 2-4 Turn mainframe power ON Figure 2-4. Ch 90 LO Measurement Connections Measure Channel 90 LO Resistance Send *RST to multiplexer Send CLOS (@nn00) to close chan 90 and 00, where nn = card # (omit leading zeroes in nn ).
  • Page 25 Ch 90-92 GU Measurements Make Hardware Connections Turn mainframe power OFF Connect DMM leads as shown in Figure 2-5 Turn mainframe power ON Figure 2-5. Ch 90 GU Measurement Connections Measure Channel 90 GU Resistance Send *RST to multiplexer Send CLOS (@nn00) to close chan 90 and 00, where nn = card # (omit leading zeroes in nn ).
  • Page 26 Ch 93 HI Measurement Make Hardware Connections Turn mainframe power OFF Connect DMM leads as shown in Figure 2-6 Turn mainframe power ON Figure 2-6. Ch 93 HI Measurement Connections Measure Channel 93 HI Resistance Send *RST to multiplexer Send CLOS (@nn93) to close chan 93, where nn = card # (omit leading zeroes in nn ) Trigger the DMM with TRIG SGL and note reading Send OPEN (@nn93) to open channel 93...
  • Page 27 Ch 93 LO Measurement Make Hardware Connections Turn mainframe power OFF Connect DMM leads as shown in Figure 2-7 Turn mainframe power ON Figure 2-7. Ch 93 LO Measurement Connections Measure Channel 93 LO Resistance Send *RST to multiplexer Send CLOS (@nn93) to close chan 93, where nn = card # Trigger the DMM with TRIG SGL and note reading Send OPEN (@nn93) to open channel 93 Subtract measured value of (R39...
  • Page 28 Ch 93 GU Measurement Make Hardware Connections Turn mainframe power OFF Connect DMM leads as shown in Figure 2-8 Turn mainframe power ON Figure 2-8. Ch 93 GU Measurement Connections Measure Channel 93 GU Resistance Send *RST to multiplexer Send CLOS (@nn93) to close chan 93, where nn = card # Trigger the DMM with TRIG SGL and note reading Send OPEN (@nn93) to open channel 93 Subtract measured value of (R40 R41) from DMM reading...
  • Page 29 PRINT "Install Component Assembly and Test Fixture " 250 PRINT PRINT " 1. Turn Mainframe AND Agilent 3458a DMM power OFF" PRINT " 2. Connect GPIB Cable between mainframe and DMM" PRINT " 3. Install E1346A Component Assembly into Mainframe"...
  • Page 30 PRINT " 5. Turn Mainframe power ON " PRINT " 5. Press Continue when ready to begin testing " PAUSE CLEAR SCREEN ! Measure Channels 00-47 and 90-92 (HI, LO, and G) OUTPUT @Dmm;"PRESET NORM;FUNC OHMF" OUTPUT @Mux;"*RST" J=100 ! Address offset PRINT TABXY(1,1),"Channel 00-47 and 90-92";Path$(K);"...
  • Page 31 PRINT TABXY(1,1),"Channels 90-92 ";Path$(K);" Measurements" PRINT TABXY(1,3),"Connect DMM Sense and Input HI leads to COMMON ";Path$(K) PRINT TABXY(1,4),"Connect DMM Sense and Input LO leads to VOLTAGE SENSE ";Path$(K) DISP " Press Continue when connections are complete " PAUSE CLEAR SCREEN J=100 ! Address Offset FOR I=0 TO 2 OUTPUT @Mux;"CLOS (@"&VAL$(J)&")"...
  • Page 32 1040 PAUSE 1050 CLEAR SCREEN 1060 OUTPUT @Mux;"CLOS (@"&VAL$(J)&")" 1070 OUTPUT @Dmm;"TRIG SGL" 1080 ENTER @Dmm;Value1(K,3) 1090 OUTPUT @Mux;"OPEN (@"&VAL$(J)&")" 1100 Result1(K,3)=Value1(K,3)-(R(38+K)+R(43-K)) 1110 IF Result1(K,3)<0 THEN Result1(K,3)=0. 1120 IF Result1(K,3)>2.0 THEN 1130 PRINT "Resistance for Channel";(J-100);" ";Path$(K);"Relay is >2.0 Ohms" 1140 END IF 1150 NEXT K...
  • Page 33 1440 NEXT K 1450 PRINT 1460 PRINT "Channel 93 Contact Resistance" 1470 PRINT 1480 FOR K=0 TO 2 1490 PRINT "Channel 93 ";Path$(K);" ";Result1(K,3);" Ohms" 1500 NEXT K 1510 END Typical Result Channel 00-47 and Channels 90-92 HI Contact Resistance CH 0 &...

  • Page 34: Test 2-2: Dc Isolation Test

    DMM indicates an overload, record the reading as >Rmax, where Rmax is the highest resistance that the DMM can measure. For example, if the DMM is an Agilent 3458A, a typical return for an overload is 1.E+38 and the entry in Table 2-2 should be >1.2 G...
  • Page 35 Figure 2-10. HI to LO Isolation Connections HI to GU Isolation Make hardware connections as shown in Figure 2-11 Trigger the DMM with TRIG SGL Record the DMM reading on Table 2-2 (HI to GU) Figure 2-11. HI to GU Isolation Connections Verification Tests 2-17...
  • Page 36 OUTPUT @Dmm;"OHM 1E9" PRINT "Equipment Connections " 100 PRINT 110 PRINT " 1. Turn Mainframe and Agilent 3458A DMM power OFF" 120 PRINT " 2. Connect GPIB Cable between mainfrmae and DMM" 130 PRINT " 3. Install Agilent E1346A Component Assembly into Mainframe "...
  • Page 37 360 PAUSE 370 CLEAR SCREEN 380 PRINT TABXY(1,1),"DC Isolation Tests " 390 PRINT TABXY(1,3),"HI to CHASSIS (Ohms)";Value(0) 400 PRINT TABXY(1,4),"HI to LO (Ohms) ";Value(1) 410 PRINT TABXY(1,5),"HI to GUARD (Ohms) ";Value(2) 420 END Typical Result A typical result for an overload on all three measurements is : DC Isolation Tests HI to CHASSIS (Ohms) 1.E+38 HI to LO (Ohms)

  • Page 38: Performance Test Record

    Test limits are defined for relay closed channel resistance and DC isolation using the specifications in Appendix A - Specifications of the Agilent E1346A Single Ended Relay Multiplexers User’s Manual . The relay contact resistance and DC isolation specifications are single-ended, meaning that there is an upper limit OR a lower limit, but not both.
  • Page 39 Table 2-2. Performance Test Record (Page 1 of 3) General Information Test Facility: Name ____________________________________ Report No. ________________________________ Address __________________________________ Date _____________________________________ City/State __________________________________ Customer __________________________________ Phone ____________________________________ Tested by __________________________________ Special Notes: ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ Test Equipment Record Model _________________________________ Report No.
  • Page 40 Table 2-2. Performance Test Record (Page 2 of 3) Minimum* Maximum Meas Test Acc Test No/Description Value Measured Value (V) Value ** Uncert Ratio (TAR) 2-1. Closed Channel Resistance (Values in Ohms) HI Path Resistance Channel 00 & 90 ___________________ 8.00E-5 Channel 01 &...
  • Page 41 Table 2-2. Performance Test Record (Page 3 of 3) Test No/Description Minimum* Measured Value (V) Maximum Meas Test Acc Value Value ** Uncert Ratio (TAR) 2-1. Closed Channel Resistance (Values in Ohms) (cont’d) HI Path Resistance ___________________ 8.00E-5 Channel 36 & 91 ___________________ 8.00E-5 Channel 37 &...
  • Page 42 2-24 Verification Tests...

  • Page 43: Chapter 3 - Replaceable Parts

    Table 3-3 shows reference designators for parts in Table 3-2, and Table 3-4 shows the manufacturer code list for these parts. To order a part listed in Table 3-2, specify the Agilent Technologies part number and the quantity required. Send the order to your nearest Agilent Technologies Sales and Support Office.

  • Page 44: Replaceable Parts

    Table 3-2. Agilent E1346A Replaceable Parts Reference Agilent Part Part Description Mfr. Mfr. Part Designator Number Code Number ASSEMBLIES/CABLES/MANUALS (See Figure 3-1) E1346-66201 MOD RLY MUXR 48CH SE 28480 E1346-66201 E1400-61605 CABLE RIBBON ASSEMBLY FOR E1400A 28480 E1400-61605 BRK1-BRK2 0050-2183 CASTING-ZINC P.C.
  • Page 45 Table 3-2. E1346A Replaceable Parts (Continued) Reference Agilent Part Part Description Mfr. Mfr. Part Designator Number Code Number A1CR2 8150-4086 WIRE 22AWG-WHITE TEFLON 1X22 105C 28480 8150-4086 A1F1 2110-0712 FUSE-SUBMINIATURE 4A 125V NTD AX 75915 R251004T1 A1F2 2110-0665 FUSE-SUBMINIATURE 1A 125V NTD AX UL CSA...
  • Page 46 Table 3-2. E1346A Replaceable Parts (Continued) Reference Agilent Part Part Description Mfr. Mfr. Part Designator Number Code Number A1U17-U18 1820-3631 IC COMPARATOR CMOS/HCT MAGNITUDE 8-BIT 27014 MM74HCT688N A1U19 1820-3664 IC GATE CMOS/HCT NAND QUAD 2-INP 27014 MM74HCT00N A1U20 1820-4242 IC SCHMITT-TRIG CMOS/HCT INV HEX...
  • Page 47 Table 3-2. E1346A Replaceable Parts (Continued) Reference Agilent Part Part Description Mfr. Mfr. Part Designator Number Code Number TERMINAL MODULE (See Figure 3-2) E1346-66510 THERMNL MODULE PC 28480 E1346-66510 A3P1 1252-1593 CONNECTOR-POST TYPE 2.54-PIN-SPCG 91662 20-8577-096-002-025 96-CONTACT A3PCB1 E1346-26510 PC BOARD - BLANK...
  • Page 48 Table 3-4. Agilent E1346A Code List of Manufacturers Mfr. Manufacturer’s Manufacturer’s Code Name Address Code 01295 TEXAS INSTRUMENTS INC DALLAS TX US 75265 04222 AVX CORP GREAT NECK NY US 11021 04713 MOTOROLA INC ROSELLE IL US 60195 06776 ROBINSON NUGENT INC...

  • Page 49: Mechanical Parts Locators

    Mechanical Figures 3-1 and 3-2 show locations of selected mechanical parts for the Parts Agilent E1346A Single Ended Relay Multiplexer. See the Component Locators at the end of Chapter 4 - Service for locations of electrical Locators components. Figure 3-1. Component Assy Mechanical Parts...
  • Page 50 Figure 3-2. Terminal Block Mechanical Parts 3-8 Replaceable Parts...

  • Page 51: Chapter 4 - Service

    T8 Torx driver to remove the front panel handles. Service Aids See Chapter 3 - Replaceable Parts for descriptions and locations of Agilent E1346A replaceable parts. Service notes, manual updates, and service literature for the multiplexers may be available through Agilent Technologies.

  • Page 52: Agilent E1346A Multiplexer Description

    Low and Guard are switched, however, by the tree switches. See Figure 4-1 for a block diagram of these modules. Component The E1346A Component Assembly consists of 16 channel relays and four Assembly tree switch relays. Each channel relay switches three HI channels to the tree switch relays.
  • Page 53 Figure 4-1. Agilent E1346A Block Diagram Service 4-3...

  • Page 54: Troubleshooting Techniques

    To troubleshoot a relay multiplexer problem you must first identify the Techniques problem and then isolate the cause of the problem to a replaceable part. See Chapter 3 - Replaceable Parts for descriptions and locations of Agilent E1346A replaceable parts. NOTE...

  • Page 55: Testing The Multiplexer

    NOTE See the Agilent E1346A Single Ended Relay Multiplexer User’s Manual for information on logical address and IRQ settings. If there are no apparent problems following the visual checks, run the Performance Verification Tests in Chapter 2 to see if a relay or other component is defective.
  • Page 56 Table 4-3. Troubleshooting Channel Number Channel Relay Tree Relay Channel Relay Driver/Decoder U1, U38 U2, U30 U3, U25 4-6 Service...

  • Page 57: Repair And Maintenance Guidelines

    Repair and This section provides guidelines for repairing and maintaining the Agilent Maintenance E1346A Single Ended Relay Multiplexer including: Guidelines ESD precautions Soldering printed circuit boards Post-repair safety checks ESD Precautions Electrostatic discharge (ESD) may damage static sensitive devices in the multiplexers.

  • Page 58: Component Locators And Schematic Diagrams

    Component Table 4-4 lists Component Locator Diagrams and Schematic Diagrams for Locators and the Agilent E1346A relay multiplexer. Schematic Diagrams Table 4-4. Relay Multiplexer Component Locator and Schematic Diagram Drawings Part Drawing Number Drawing Title Number Component E1346-66501 L-E1346-66501 Relay Multiplexer Component Assembly...

  • Page 59: Appendix A - Verification Tests - C Programs

    Verification Test Example: Self Test The self test for Agilent E1346A Single Ended Relay Multiplexer consists of sending the *IDN? command and checking the response. This test can be used to verify that the multiplexer is connected properly and is responding to a baxic command.

  • Page 60: Performance Verification Tests

    RF Multiplexer. If a channel is out of specification, the program prints a message and pauses. /* Closed-channel Resistance Test E1346A * / # include < stdio.h> # include < sicl.h> # define ADDR "hpib7,9,14"...
  • Page 61 ("\ nResistance of R%u = %If’, i+ 38, R[i]); printf ("\ n\ n\ nlnstall Component Assembly and Test Fixture"); printf ("\ n\ n 1. Turn Mainframe AND Agilent 3458a DMM power OFF."); printf ("\ n 2. Connect GPIB Cable between mainframe and DMM.");...
  • Page 62 if (result[i] < 0) result[i] = 0; if (result[i] > 2.0) printf ("\ n* * * Resistance for Channel %u HI path is 2.0 Ohms * * * %If", i, result[i]); printf ("\ n\ nMeasurements complete for Channels 00-47 and 90-92 HI"); printf ("\ nPress ENTER for Channels 90-92 LO measurements");...
  • Page 63 for (i = 0; i < = 2; i+ + ) iprintf (id, "CLOS (@°/0u)\ n", j); iprintf (dm, "TRIG SGL\ n"); iscanf (dm, "%lf", &value1[i][2]); iscanf (dm, "%t", cr); iprintf (id, "OPEN (@%u)\ n", i* 8); resultl[i][2] = value1[i][2] - R[42]; if (resultl[i][2] <...
  • Page 64 iscanf (dm, "%t", cr); resultl[1][3] = valuel[1][3] - R[39] - R[42]; iprintf (id, "open (@%u)\ n", j); if (result1[1][3] < 0) result1[1][3] = 0; if (result1[1][3] > 2.0) printf ("\ n* * * Resistance for Channel 93 LO Relay is 2.0 Ohms");...

  • Page 65: Example: Dc Isolation Test

    ("\ nDC Isolation - HI to CHASSIS "); printf (" R = %s Ohms", reading); /* ..HI to LO..* / printf ("\ n\ nConnect DMM HI and LO to E1346A COMMON HI and COMMON LO"); getchar 0; iprintf (dm, "TRIG SGL\ n");...
  • Page 66 /* ..HI to GUARD..* / printf ("\ n\ nConnect DMM HI and LO to E1346A COMMON HI and COMMON G"); getchar (); iprintf (dm, "TRIG SGL\ n"); iscanf (dm, "%t", reading); printf ("\ nDC Isolation - HI to GUARD ");...

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75000 series c

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