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1 Notices
All illustrations are for reference purposes only. Nothing contained in this document shall
replace or modify the requirements of industry standards applicable to wire or other protection,
including without limitation, those of the American Boat and Yacht Council (ABYC); the
National Electric Code (NEC); and/or the National Fire Protection Association (NFPA). Failure
to install the device or any components thereof in compliance with any such Industry Standard
may limit the warranties made by Carling Technologies, Inc.
WARNING
• Removal of CLMD12 cover in the field will compromise the operation of
the unit and voids warranties set forth by Carling Technologies.
2 Introduction
Congratulations on your purchase of the Maretron MPower CLMD12 12 Channel DC Load
Module. Carling has designed and built your CLMD12 to the highest standards for years of
dependable and accurate service.
The Maretron CLMD12 contains 12 output channels implemented by direct current (DC)
Electronic Circuit Breakers (ECB's), each capable of switching up to 5, 10, or 12 Amps, with a
total current capacity of 75 Amps. In addition to fast switching, low-loss solid state ON/OFF
switches, it provides accurate current measurement for each load along with short circuit
protection.
The CLMD12 additionally contains 7 input channels implemented by DC digital inputs,
programmable to sense whether the input is connected to a high level, connected to a low
level, or left unconnected.
The CLMD12 connects directly to an NMEA 2000
breakers from a Maretron DSM-Series display or any device running Maretron N2KView
software, such as TSM-Series multifunction displays or MBB-Series black boxes. Additionally,
since the CLMD12 supports standard NMEA 2000
®
by any NMEA 2000
DC loads like lights or inductive DC loads like pumps and motors. The CLMD12 can also be
used to switch AC circuits using external relays. An added benefit of the CLMD12 is that it
reports the current through each of the 12 breakers. This allows you to determine if loads are
drawing too little electrical current such as burnt-out bulbs, or if the loads are starting to draw
too much electrical current.
Revision 1.6
device supporting those messages. The CLMD12 easily handles resistive
®
network, so you can turn on and off the
®
messages for control, it can be controlled
®
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