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ACM100

Alternating Current Monitor

* ACM100 may require configuration depending on application, see User Manual (Maretron DSM570, DSM410, USB100, or IPG100 needed to configure)

Link to knowledge base and frequently asked questions

Maretron's ACM100 is a device which monitors AC power sources and outputs information about these sources onto the industry standard NMEA 2000®marine data network. The ACM100 can monitor power busses, generators, or utility power. ACM100 output information is then displayed with networked NMEA 2000® equipment such as the Maretron DSM570 or DSM410 dedicated display or with NMEA 2000® compatible software such as Maretron's N2KView®. Best of all, the ACM100 is NMEA 2000® certified so you can view any and all AC information anywhere on the vessel using a compatible NMEA 2000® display.

The ACM100 is a key component of Maretron's N2KView® vessel monitoring and control system.

  • Voltage
  • Current
  • Frequency
  • Real power
  • Reactive power
  • Apparent power
  • Power factor
  • Total energy imported
  • Total energy exported

The following accessories are available for the ACM100:

100 Amp AC transducer with cable

Part Number: M000630

400 Amp AC transducer with cable

Part Number: M000612

Note: Maretron monitoring sensors are updated using Maretron’s N2KAnalyzer application on a PC paired with an approved NMEA 2000® gateway.

1.1.3.6 (2025-06-03) – Current Release
  • Support PGN: 127503 and 127504 (Bug #ACM100SW-2)
  • Add NMEA standard alert feature, support up to 8 ACM alerts
  • Add X-Switch feature, support up to 8 switch channels
1.1.2.2 (2025-01-14) - Not Released
  • Support PGN: 127503 and 127504 (Bug #ACM100SW-2)
1.1.1.2 (2020-01-24) 
  • All improvement in ACM100 SW 1.1.1.1
  • Support small CT
  • Correctly assign minimum current threshold depended on CT selected
  • Correct calibration process frequency check
1.1.1.1 (2017-11-01) - Not Released
  • fix bug which cause a wrong time reading when timer compare match occur and interrupt was disabled and insert folder name in include header
  • Support Heartbeat PGN (126993)
  • Comply with NMEA2000 version 2.100 certification
  • Change NMEA Certification Level to 2 (As of February 2015 and Version 2.000 of the NMEA 2000 Main Document, Certification Level Field (7) shall be set to 2 meaning “Not Applicable”)
  • Default to use fix phase option (estimate VLL using user configuration instead of fully mathematics calculation) (bug #4348)
1.0.9.2 (2013-07-02)
  • Change default TX periodic rate of all PGN to 500ms (from 100ms).(bug #2563)
  • Change NMEA 2000 Database Version to 2.000 (bug #2610)
  • Support Total kW Hours Reset (bug #2574)
1.0.8.2 (2012-07-30)
  • Correct energy record calculation.
1.0.7 (2011-02-08)
  • Support CT selectable.
1.0.6 (2009-08-07)
  • Calculate true RMS for V Line-Line instead of using vector.
1.0.5 (2009-02-23)
  • Support Maretron Label Protocol #2
  • Support Maretron Channel Protocol #2
1.0.4 (2008-12-05)
  • Support Maretron Label Protocol
  • Support Maretron Channel Protocol
1.0.3 (2008-10-21)
  • Change N2K Class/Function to 30/140 (Power Management and Lighting Systems / Load)
1.0.2 (2008-08-21)
  • Change default Node Address to 0xC0 (to support production program)
  • Check an invalid damping period
1.0.1 (2008-07-24)
  • Initial Public Release
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