Relay Contact Terminals (No, C, Nc (0) To No, C, Nc (7)) - Measurement Computing Switch & Sense 8/8 User Manual

Switch & Sense 8/8 User's Guide

Relay contact terminals (NO, C, NC (0) to NO, C, NC (7))

The two outer groups of 12 screw terminals connect to the normally open (NO), common (C), and normally
closed (NC) contacts for relays 0 through 7.
Form C relay output
A schematic for Form C relay contacts is shown here. The Form C relay has a C, NO, and NC contact.
When a (0) is written to the output bit, the C and NC are in contact.
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When a (1) is written to the output bit, the C and NO are in contact.
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At power-up, the relays are put into a non-energized state (NC in contact to Common).
Figure 4. Form C SPDT relay
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Functional Details