In this section:
Model 3740 32-channel isolated switch card.......................... 12-1
Introduction to the Model 3740 card....................................... 12-1
Available accessories: Model 3740 ........................................ 12-2
Connection information: Model 3740...................................... 12-2
Schematics: Model 3740 ........................................................ 12-3
Introduction to the Model 3740 card
The Model 3740 offers 28 general-purpose form C channels that are ideal for routing power or other
control devices (see next figure). For higher power applications of up to 7 A, four additional high-
current form A channels are provided.
If any general-purpose signal requires routing to the Series 3700A 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 notifies 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: Model 3740 card
Figure 60: Model 3740
Section 12
Model 3740 general purpose card