Nmea Interface - NorthStar MX500 Operator's & Installation Manual

Installation Notes
The external alarm is derived from the "EXT alarm" port on AUX (8-pin)
cable, pin 3 (Blu) and pin 4 (Prpl). The software is setup in each of the
appropriate CFG1 (Alarms) menu. The relay coil supply voltage must
be connected to an independent battery backed-up alarm supply. Make
sure the relay coil voltage is compatible with the voltage rating of the
alarm power supply (i.e. NTE Electronics Relay - P/N R14-11D10-12 for
use in a 12 VDC supply). The negative ground of the alarm power sup-
ply must be connected to Pin 3 (Blu) of the AUX (8-pin) cable (refer to
the relay diagram below).

NMEA Interface

The MX500 meets the NMEA 0183 version 2.3 electrical standard for
marine interface communications with other marine equipment, such
as:
Radars, Plotters, Autopilots, Fish Finders, etc.
There are differences in the electrical interface specification between
NMEA 0183 version 1.5 (introduced in 1987) and NMEA 0183 version
2.0 and later (introduced in 1994). Some older model equipment utilize
RS-232, others use RS-422, and others meet the older version 1.5 speci-
fication. In an effort to simplify your interface capabilities, you should
take the time to determine which electrical interface specification all of
the interfaced equipment meets.
Version 3.0
To a Battery Back-Up
Alarm Power Supply
-
+
MX 500
AUX (8-pin) Cable
Pin 3 (Blue)
AUX (8-pin) Cable
Pin 4 (Purple)
Installation Manual
Continuous-Duty
SPDT Relay
(12 VDC < 75 mA)
N.C. C
N.O.
215