Tektronix KEITHLEY 7703 Instructions For Use Manual
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Tektronix KEITHLEY 7703 Instructions For Use Manual

Multiplexer module
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Keithley Instruments
28775 Aurora Road
Cleveland, Ohio 44139
1-800-833-9200
tek.com/keithley
Introduction
This 7703 can be used with the DAQ6510 Data Acquisition and Multimeter System or the 2750
Multimeter/Switch System. If you are using the 7703 with the DAQ6510, refer to Model 7703
Multiplexer Module Instructions for use with DAQ6510, document number 0771448xx.
The 7703 32-Channel High-Speed Differential Multiplexer Module offers 32 channels of 2-pole or 16 channels of
4-pole multiplexer switching that can be configured as two independent banks of multiplexers. The nonlatching
reed relays provide high speeds and are designed for 300 V, 500 mA; 10 VA. The relay closures are stored in
onboard memory. The 7703 is ideal for RTD and thermistor temperature applications.
Figure 1: Model 7703 32-Channel High-Speed Differential Multiplexer Module
Item shipped may vary from model pictured here.
The 7703 includes the following features:
32 channels for general purpose measurements.
Relay actuation time of less than 1ms for high-speed scanning.
Two- or four-wire measurement.
Two 50-pin female D-sub connectors are standard for secure hook-up and quick teardown.
50-pin D-subminiature connector kit (part number 7703-306A (7788), which includes two D-sub connectors.
This kit has 18 AWG solder-cup contacts and is gold-plated (flash) over nickel on entire contact (brass pin).
077182500 July 2023
Model 7703 Multiplexer Module
*P077182500*
Instructions for use with 2750
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Summary of Contents for Tektronix KEITHLEY 7703

  • Page 1 Model 7703 Multiplexer Module Instructions for use with 2750 Keithley Instruments 28775 Aurora Road Cleveland, Ohio 44139 1-800-833-9200 tek.com/keithley Introduction This 7703 can be used with the DAQ6510 Data Acquisition and Multimeter System or the 2750 Multimeter/Switch System. If you are using the 7703 with the DAQ6510, refer to Model 7703 Multiplexer Module Instructions for use with DAQ6510, document number 0771448xx.

  • Page 2: Module Connections

    Model 7703 Multiplexer Module Instructions for use with 2750 Connections The following information describes how to make connections to the switching module and define the channel designations. A connection log is provided that you can use to record your connections. Connection and wiring procedures in this document are intended for use by qualified personnel only, as described by the types of product users in the Safety precautions...
  • Page 3 Model 7703 Multiplexer Module Instructions for use with 2750 To wire the 7703-306 connector kit: 1. Disassemble the connector shell by removing the #4-40 fillister head screws and hex nuts. 2. Make all connections using the correct wire size (up to 20 AWG). Add supplementary insulation around the harness for voltages above 42 V , as shown in the following figure.

  • Page 4: Channel Designations

    Model 7703 Multiplexer Module Instructions for use with 2750 All wiring must be rated for the maximum voltage in the system. For example, if 1000 V is applied to the front terminals of the instrument, the switching module wiring must be rated for 1000 V.
  • Page 5 Model 7703 Multiplexer Module Instructions for use with 2750 The Input and Sense terminals are connected to the inputs of channels 33 and 34 (isolation relays). Channels 33 to 35 in this schematic refer to designations used for control and not actual available channels.

  • Page 6: Connection Log

    Model 7703 Multiplexer Module Instructions for use with 2750 Connection log You can use the following table to record your connection information. Connection log for the 7703 Channel Color Description Description Color Channel INPUT SENSE CH17 CH18 CH19 CH20 CH21 CH22 CH23 CH24...

  • Page 7: Installation

    Model 7703 Multiplexer Module Instructions for use with 2750 Installation For information on installing the switching module into the 2750, refer to the Model 2750 User's Manual, 2750-900-0xx available at tek.com/keithley. Operation This module is similar to the 7700, except that the 7703 does not support amps measurement and has a different number of available channels.

  • Page 8: Safety Precautions

    Safety precautions The following safety precautions should be observed before using this product and any associated instrumentation. Although some instruments and accessories would normally be used with nonhazardous voltages, there are situations where hazardous conditions may be present. This product is intended for use by personnel who recognize shock hazards and are familiar with the safety precautions required to avoid possible injury.
  • Page 9 For safety, instruments and accessories must be used in accordance with the operating instructions. If the instruments or accessories are used in a manner not specified in the operating instructions, the protection provided by the equipment may be impaired. Do not exceed the maximum signal levels of the instruments and accessories. Maximum signal levels are defined in the specifications and operating information and shown on the instrument panels, test fixture panels, and switching cards.

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