Keysight 34921A User Manual
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Keysight 34921A User Manual

Low frequency multiplexer modules
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  • Page 1 Artisan Technology Group is your source for quality new and certified-used/pre-owned equipment SERVICE CENTER REPAIRS WE BUY USED EQUIPMENT • FAST SHIPPING AND DELIVERY Experienced engineers and technicians on staff Sell your excess, underutilized, and idle used equipment at our full-service, in-house repair center We also offer credit for buy-backs and trade-ins •...
  • Page 2 User Guide Keysight 34921A-34925A Low Frequency Multiplexer Modules Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 3 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 4 Malaysia or disclose the Software. The EULA and MATION CONTAINED HEREIN. SHOULD the license set forth therein, does not KEYSIGHT AND THE USER HAVE A SEP- Published by require or permit, among other things, ARATE WRITTEN AGREEMENT WITH that Keysight: (1) Furnish technical infor- WARRANTY TERMS COVERING THE Keysight Technologies, Inc.
  • Page 5 In Case of Damage Cleaning Instruments that appear damaged or Clean the outside of the Keysight mod- defective should be made inoperative ule/chassis with a soft, lint-free, and secured against unintended oper- slightly dampened cloth. Do not use ation until they can be repaired by detergent or chemical solvents.
  • Page 6 Do not dispose in domestic household waste. Alternating Current (AC). To return unwanted products, contact This symbol represents the time period your local Keysight office for more during which no hazardous or toxic Standby Power. Unit is not information. substance elements are expected to completely disconnected leak or deteriorate during normal use.
  • Page 7 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 8: Table Of Contents

    34921A D-Sub Connectors........
  • Page 9 34925T-002 Terminal Block for One-Wire Mode ....Index viii Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 10: Low Frequency Multiplexer Modules

    - You can connect a MUX to an external instrument, and/or switch multiple analog signals to the internal DMM. - With the 34921A, 34922A, 34923A, and the 34924A modules, you can close more than one channel in each bank simultaneously (N:1 configuration).

  • Page 11: Measurement Functions For The Multiplexer Modules

     10 k or higher range used for loads over approximately 300 due to series resistance of FET channels. Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 12: Operating Considerations

    (faceplate) lose continuity. This prevents signals on the Analog Buses from being present on the D-sub connector pins. Optional terminal blocks available from Keysight automatically provide continuity for these interlock pins. If cables are used, you must provide continuity for the interlock pins in your DUT assembly.

  • Page 13: Scpi Programming Examples For The Multiplexer Modules

    MUX section of this manual. For complete information on the SCPI commands used to program the 34980A, with example programs, refer to the Keysight 34980A Programmer’s Reference contained on the 34980A Product Reference CD. Opening and Closing Channels...
  • Page 14 FETCh? Example - Making current measurements: The following command configures channel 43 for a 34921A modules in slot 7 for dc current measurements, triggers the internal DMM to scan the channel, and then sends the reading to the output buffer of the 34980A. The default settings for range (autorange) and resolution (1 PLC) are used for the measurement.
  • Page 15 Example - Resetting module(s) to power-on state: The following command resets a module in slot 4 to its power-on state. SYSTem:CPON 4 Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 16: 34921A 40-Channel Armature Multiplexer With Low Thermal Offset

    Low Frequency Multiplexer Modules 34921A 40-Channel Armature Multiplexer with Low Thermal Offset The 34921A 40-Channel Armature Multiplexer (40-Ch Arm MUX) is divided into two banks with 20 latching armature switches (channels 1-20 and 21-40) in each. This module also offers four additional fused relays (channels 41-44) for making AC and DC current measurements with the internal DMM with no external shunts needed.
  • Page 17 ABus3. Or, externally you can connect COM1 to COM2 to create this configuration. Low thermal offset voltage makes the 34921A ideal for low-level signal switching. The 34921T optional terminal block provides a built-in thermocouple reference junction that helps minimize errors due to thermal offset when you measure thermocouples.

  • Page 18: 34921A Simplified Schematic

    COM 1 Analog Buses ABus1 ABus2 Current ABus3 ABus4 (MEAS) Current (SENS) Fuse Fuse Fuse Fuse COM 2 Bank 2 Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 19: 34921A D-Sub Connectors

    Low Frequency Multiplexer Modules 34921A 40-Channel Armature Multiplexer with Low Thermal Offset 34921A D-Sub Connectors Bank1 Bank 1 Bank 2 For orientation, the D-sub connector end of the module is *TSIL = Temperature Sensor Interface Line. 14L 5H 20H 20L...
  • Page 20 This feature protects inadvertent routing of high voltages from the Analog Bus to the D-sub connector of the module. Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 21: 34921T Terminal Block

    34921T terminal block. If cabling is not correct, an error may occur indicating that the 34921A module is not fully operational. Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 22 34921T Wiring Log for you to document your wiring configuration for this module. You can open the wiring log file in Microsoft® Excel® or Adobe® Acrobat® format. Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 23: 34922A 70-Channel Armature Multiplexer

    24. When the power is off, all channel relays maintain state, and the Analog Bus relays open. Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 24: 34922A Simplified Schematic

    Bank Relays: Armature latching; Analog Bus Relays: Armature non-latching Bank 1 COM 1 Analog Buses ABus1 ABus2 ABus3 ABus4 (MEAS) (SENS) COM 2 Bank 2 Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 25: 34922A D-Sub Connectors

    This feature protects inadvertent routing of high voltages from the Analog Buses to the D-sub connector of the module. Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 26 This feature protects inadvertent routing of high voltages from the Analog Buses to the D-sub connector of the module. Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 27: 34922T Terminal Blocks

    In addition, space is available on the label for you to write the slot number. Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 28 In addition, space is available on the label for you to write the slot number. COM2 36 COM1 Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 29: 34923A 40/80-Channel Reed Multiplexer

    31 page If you are using an Keysight 34923T-00x terminal block to connect your DUT to this module, be sure to use the terminal block that corresponds to your module configuration mode (Refer to the terminal block drawings on...

  • Page 30: Two-Wire Mode

    Each 40 channel bank is further divided into two 20 channel sub-banks in the control circuitry. These channels are split 20 to a bank. For example, with one Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 31 Analog Bus relay closed you can close up to a maximum of 39 channel relays. If you try to close more than the allowed number of channels, you will receive an error message. Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 32: 34923A Simplified Schematic For Two- Or Four-Wire Mode

    100 Analog Buses ABus1 ABus2 ABus3 ABus4 (MEAS) (SENS) 100 100 100 100 100 100 COM 2 Bank 2 Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 33: 34923A D-Sub Connectors For Two- Or Four-Wire Mode

    This feature protects inadvertent routing of high voltages from the Analog Bus to the D-sub connector of the module. Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 34 This feature protects inadvertent routing of high voltages from the Analog Buses to the D-sub connector of the module. Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 35: 34923T-001 Terminal Block For Two-Wire Or Four-Wire Mode

    Analog Buses. “Safety Interlock” on page 11 for further information. If you are using an Keysight terminal block to connect your DUT to this module be sure to use the 34923T-001 terminal block that corresponds to the 2- or 4-wire configuration mode.

  • Page 36: 34923A Simplified Schematic For One-Wire Mode

    100 Analog Buses ABus1 ABus2 ABus3 ABus4 (MEAS) (SENS) 100 100 100 100 100 100 COM 2 Bank 2 Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 37: 34923A D-Sub Connectors For One-Wire Mode

    This feature protects inadvertent routing of high voltages from the Analog Bus to the D-sub connector of the module. Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 38 This feature protects inadvertent routing of high voltages from the Analog Buses to the D-sub connector of the module. Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 39: 34923T-002 Terminal Block For One-Wire Mode

    Analog Buses. “Safety Interlock” on page 11 for further information. If you are using an Keysight terminal block to connect your DUT to this module be sure to use the 34923T-002 terminal block that corresponds to the 1-wire configuration mode.
  • Page 40 Low Frequency Multiplexer Modules Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 41: 34924A 70-Channel Reed Multiplexer

    Therefore, you must consider these resistors when you are designing a measurement. Refer to the simplified schematic on page Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 42 If higher voltage is being switched, limits on source current are recommended. When the power is off, all channel and Analog Bus relays open. Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 43: 34924A Simplified Schematic

    100 Analog Buses ABus1 ABus2 ABus3 ABus4 (MEAS) (SENS) 100 100 100 100 100 100 COM 2 Bank 2 Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 44: 34924A D-Sub Connectors

    This feature protects inadvertent routing of high voltages from the Analog Buses to the D-sub connector of the module. Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 45 This feature protects inadvertent routing of high voltages from the Analog Buses to the D-sub connector of the module. Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 46: 34924T Terminal Blocks

    In addition, space is available on the label for you to write the slot number. Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 47 In addition, space is available on the label for you to write the slot number. COM2 36 COM1 Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 48: 34925A 40/80-Channel Optically-Isolated Fet Multiplexer

    50 page If you are using an Keysight 34925T-00x terminal block to connect your DUT to this module, be sure to use the terminal block that corresponds to your module configuration mode (Refer to the terminal block drawings on...

  • Page 49: Four-Wire Mode

    Once in the overvoltage state, you must restore normal module operation with one of these actions: - using the SYSTem:CPON <slot> command. This affects only the module specified. Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 50 Thus this module will operate as only a 1:N MUX module. For more information about FET channel closures, refer to page Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 51: 34925A Simplified Schematic For Two- Or Four-Wire Mode

    COM 1 Analog Buses ABus1 ABus2 ABus3 ABus4 (MEAS) (SENS) COM 2 100 51.1 Bank 2 11 11 Current-Limiting Circuitry Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 52: 34925A D-Sub Connectors For Two- Or Four-Wire Mode

    This feature protects inadvertent routing of high voltages from the Analog Bus to the D-sub connector of the module. Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 53 This feature protects inadvertent routing of high voltages from the Analog Buses to the D-sub connector of the module. Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 54: 34925T-001 Terminal Block For Two-Wire Or Four-Wire Mode

    “Safety Interlock” on page 11 for further information. - If you are using an Keysight terminal block to connect your DUT to this module be sure to use the 34925T-001 terminal block that corresponds to the 2- or 4-wire configuration mode. An error will not be generated if you have installed a terminal block that doesn't match the present module configuration.

  • Page 55: A Simplified Schematic For One-Wire Mode

    COM 1 Analog Buses ABus1 ABus2 ABus3 ABus4 (MEAS) (SENS) COM 2 100 51.1 11 11 Current-Limiting Circuitry Bank 2 Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 56: A D-Sub Connectors For One-Wired Mode

    This feature protects inadvertent routing of high voltages from the Analog Bus to the D-sub connector of the module. Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 57 This feature protects inadvertent routing of high voltages from the Analog Buses to the module. Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 58: T-002 Terminal Block For One-Wire Mode

    Analog Buses. “Safety Interlock” on page 11 for further information. If you are using an Keysight terminal block to connect your DUT to this module be sure to use the 34925T-002 terminal block that corresponds to the 1-wire configuration mode.
  • Page 59 34922A 34925A 34923A connector pinouts 34924A description 34925A overload protection programming examples simplified schematic terminal blocks temperature sensor Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 60 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 61 This information is subject to change without notice © Keysight Technologies 2016 Edition 2 January 2016 Published in USA 34980-90021 www.keysight.com Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 62 Artisan Technology Group is your source for quality new and certified-used/pre-owned equipment SERVICE CENTER REPAIRS WE BUY USED EQUIPMENT • FAST SHIPPING AND DELIVERY Experienced engineers and technicians on staff Sell your excess, underutilized, and idle used equipment at our full-service, in-house repair center We also offer credit for buy-backs and trade-ins •...

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