System Switch/Multimeter User's Manual Section 9: Series 3700 Module Schematics
-900-01 Rev. A / August 2007 9-
Model 3740 32-channel isolated switch card
The Model 3740 offers 28 general-purpose form C channels that are ideal for routing power or
other control devices. For higher power applications of up to 7A, four additional high-current
form A channels are provided.
If any general-purpose signal requires routing to the Series 3700 mainframe backplane, terminal
blocks that can be enabled through jumpers are located on the card. Custom configurations can
be created with the user-accessible terminal blocks. For additional protection, an onboard
temperature sensor will notify the mainframe when the card’s operating temperature exceeds
70°C, compromising system specifications.
The Model 3740 uses two 50-pin male D-sub connectors for signal connections. For screw
terminal connections, use the detachable Model 3740-ST accessory.
Figure 9-36: Model 3740
Available accessories: Model 3740
50-pin, female-to-male, D-sub cable assembly, 1.5m (4.9ft)
-pin, female-to-male, D-sub cable assembly, 3m (9.8ft)
50-pin, female, D-sub connector kit (solder cup contacts). See Connection
information: Model 3740 (on page 9-44).