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Alternating Latching Relay

A two input module that will latch a set of dry contacts (relay) from NC to NO, with a +12Vdc input or a momentary ground input. The two inputs operate such that either input can cause the NC and NO contact to alternately latch, or unlatch. The output for the VCMR-01 is +12Vdc and is normally closed, an input signal for more than 250 milliseconds will latch closed the normally open set of contacts and when power is re-appiled return to the NC output.

Vehicle Control Modules

Key Features:

  • Max 15 amps on each output
  • Power on (87A) or ground will cycle the Form C relay contacts
  • Both outputs are relay dry contact closures
  • All connections are made through .250″ fastons connectors


  • Operational voltage is +8Vdc to +16 Vdc
  • Operating temperature of -40C to +85C
  • Processor requires constant +12Vdc power

System Diagram:

Mechanical Drawing:

Product Literature and Resources:

VCMR-01 Data Sheet

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