The B-Series panel onboard relay can be configured for either:
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Aux Power
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Common output
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Standard Form-C relay
Aux Power configuration,
Right two pins covered, the C terminal has 12Vdc available and upon activation will switch to the NO terminal.
Relay A turned off, NO to Common reads 0Vdc.
Relay A turned on, NO to Common reads +12Vdc.
Aux Common configuration,
Left two pins covered, the C terminal is Common. Upon activation Common is switched to the NO terminal.
Relay A turned off, NO to Aux= 0Vdc
Relay A turned on, NO to Aux= 12Vdc
Dry Contact Configuration
No jumper used, NO and C and NC works as a standard dry contact.
Relay A turned off, NO to C= Open, NC to C= Short
Relay A turned on, NO to C= Short, NC to C= Open