Measurement Computing PC104-PDISO8 - Manual (Page 13)

Figure 4-2. BP40-37 Pinouts
4.1 FORM C RELAY OUTPUTS
Figure 4-3 is the schematic for a
form C relay, used at OP0 through
OP4.
The form C relay has a COMMON,
normally open (NO) and normally
closed (NC) contact.
When a 0 is written to the output,
the common and NC are in contact.
When a 1 is written to the output,
the common and NO are in contact.
Figure 4-3. Form C Relay
The pin numbers shown in Figure 4-2 correspond to the 37 pin connector when using
an adapter such as the BP40-37 or the C40-37F-2 cable for relay #0.
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