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How do I wire the Maretron CLMD12 Digital Switching Module for my boat?

1Answers
Maggie
12/17/2025, 06:10:55 PM

Wiring the Maretron CLMD12 Digital Switching Module correctly is crucial for its proper function. Here's a step-by-step guide:

  1. Load Connections: The CLMD12 has two connectors. The J1 connector is for loads up to 12A, and the J2 connector handles electromechanical input connections. Match your load's amperage to the appropriate connector.
  2. J1 Connector Wiring (Loads up to 12A): Use the mating connector with flying leads (included with the CLMD12-R retail version) to connect your loads. Ensure each load's current draw doesn't exceed 12A per circuit.
  3. J2 Connector Wiring (Electromechanical Inputs): Use the mating connector and flying leads (included with the CLMD12-R). The reference ground is located on pin 6 of this connector.
  4. NMEA 2000® Connection: The CLMD12 uses a standard 5-pin micro-C NMEA 2000® CAN cable for communication. Connect this cable to your boat's NMEA 2000® network.
  5. Wiring Best Practices: Always consult the Maretron CLMD12 user manual for the most accurate wiring diagrams. Double-check all connections for accuracy and safety.
  6. Flying Leads: Note that the CLMD12 (OEM version) does not include flying leads harnesses. The CLMD12-R (retail version) does include the flying leads.

Following these steps and consulting the user manual will help you successfully wire your Maretron CLMD12 Digital Switching Module, ensuring optimal performance of your vessel's electrical system.

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