Tektronix KEITHLEY 3724 Instructions Manual

Keithley Instruments
28775 Aurora Road
Cleveland, Ohio 44139
1-800-833-9200
tek.com/keithley
Introduction
The 3724 provides two independent banks of solid-state relays arranged as 1×30 two-pole multiplexers that are
ideal for high reliability, high speed multipoint measurement applications, including temperature. The two banks
can be automatically connected to the Series 3700A mainframe backplane and optional DMM through the analog
backplane connection relays. These connections allow the mainframe to configure the card to a single 1×60
two-pole multiplexer or to enable card-to-card expansion for even larger configurations.
The solid-state FET relay technology supports fast switching times, with scanning rates of greater than
1250 channels per second and provides unlimited contact life. In addition, the 3724 supports thermocouple
temperature measurements when used with the 3724-ST screw-terminal accessory, providing automatic cold
junction compensation (CJC).
The 3724 uses two 78-pin male D-sub connectors for signal connections. For screw terminal or automatic CJC,
use the detachable 3724-ST accessory. For more information regarding available cards and accessories, refer to
the Series 3700A System Switch/Multimeter and Plug-in Cards datasheet, available at tek.com/keithley.
The 3724 card is shown in the following figure.
Item shipped may vary from model pictured here.
This document describes how to install the plug-in card and make connections to it. For information on scanning,
and on reading, writing, and controlling channels, refer to the Series 3700A System Switch/Multimeter Reference
Manual, available at tek.com/keithley.
077183700 October 2024
Model 3724 Dual 1×30 FET Multiplexer Card
Figure 1: Model 3724 Dual 1 x 30 Multiplexer Card
*P077183700*
Instructions
1