Section 9: Series 3700 Module Schematics and Connections
Series 3700 System Switch/Multimeter User's Manual
9-10
3700S-900-01 Rev. C / July 2008
Query the slot[X] attributes to determine the capabilities of the installed
switching modules. For example, send the following query to determine if Slot 1
supports common-side 4-wire
channels:
CommonSideOhms1 = slot[1].commonsideohms
Hardware interlocks
Some switching modules are capable of switching high voltage signals. For
safety reasons, hardware interlocks are provided. The hardware interlocks are
present on the switching module itself and are designed to keep the switching
module disconnected from the system backplane. This has the implication that
when the interlock circuit is disengaged, no measurements can be performed
through a switching module. Channel relays can continue to operate, however.
Below is a simplified schematic of the interlock circuit present on the applicable
switching modules.
Figure 9-1: Simplified interlock circuit