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OctoPlex® System Interface Unit Monitor

The System Interface Unit Monitor (SIU) allows the user to interface with up to 34 digital signals (DC discrete inputs) to the OctoPlex® system for status and monitoring purposes. The SIU can be configured to perform Discrete I/O Functions, in conjunction with the AC and DC Distribution units.

Power Input

10 VDC – 32 VDC

Power Consumption

100 mA Max (@ 28 VDC)

DC Signal Input

Ground; 12 VDC; 24 VDC for each input

CAN Bus Voltage

+15 VDC (± 0.5)

Load Equivalence Number



5.89” X 4.74” X 2.95”

CAN Bus Connectors

Two (2) Micro-C Male

Operating Temperature

-40°C to +70°C


1.6 lbs (0.73 kg) nominal

NMEA 2000

Category B

Lloyd’s Register

Lloyd’s Type Approved, Test Specification #1, Env 2


IEC 60533 Electrical and Electronic Installations in Ships
IEC 60945 Maritime Navigation and Radio Communication Equipment and Systems