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ALM100 User's Manual
Page A8 Appendix A – NMEA 2000 Interfacing Revision 1.0
5 Technical Specifications
As Maretron is constantly improving its products, all specifications are subject to change
without notice. Maretron products are designed to be accurate and reliable; however, they
should be used only as aids to navigation and not as a replacement for traditional navigation
aids and techniques.
Specifications
Parameter Value Comment
Annunciator Volume 105 dB SPL Mechanical Volume Control
Annunciator Frequency 2.9 kHZ
Certifications
Parameter Comment
NMEA 2000
®
Standard Level A
Maritime Navigation and Radiocommunication Equipment & Systems IEC 61162-3
Maritime Navigation and Radiocommunication Equipment & Systems IEC 60945
FCC and CE Mark Electromagnetic Compatibility
NMEA 2000
®
Parameter Group Numbers (PGNs)
Description PGN # PGN Name Default Rate
Periodic Data PGNs 128720 Proprietary Alarm Status* 1 time/second
Response to Requested PGNs 126464 PGN List (Transmit and Receive) N/A
126996 Product Information N/A
126998 Configuration Information N/A
Protocol PGNs 059392 ISO Acknowledge N/A
059904 ISO Request N/A
060928 ISO Address Claim N/A
065240 ISO Address Command N/A
126208 NMEA N/A
Maretron Proprietary PGNs 128720 Configuration N/A
*Future firmware updates will allow the ALM100 to be in conformance with the upcoming
NMEA 2000 alarm messaging protocol, once it is defined.
Electrical
Parameter Value Comment
Operating Voltage 9 to 32 Volts DC Voltage
Power Consumption 100 mA NMEA 2000 Interface
Load Equivalence Number (LEN) 2 NMEA 2000
®
Spec. (1LEN = 50 mA)
Reverse Battery Protection Yes Indefinitely
Load Dump Protection Yes Energy Rated per SAE J1113
Mechanical
Parameter Value Comment
Size 2.75” x 4.50” x 2.00”
(70mm x 114mm x 51mm)
Including wall plate – Mounts in standard
single-gang electrical box
Weight 13 oz. (368.5g)