GN33 Installation and service Chapter 10-7
10.5.1 Power supply connections
The internal voltage regulator will allow the GN33 to operate normally within
the power supply voltage range from 10 to 32 V DC. The GN33 is connected
to external power (battery) by means of the supplied power/NMEA cable.
Cable length is approximately 2 meters.
After connecting the cable to the power source, push the plug as far as it will
go into the nine pin receptacle marked “PWR” on the rear of the cabinet and
turn the plug’s coupling ring clockwise until it makes a click.
10.5.2 Fuse
Warning! A fuse should always be installed to protect the unit.
Using a fuse which is not specified for your equipment can cause it to blow
the instant the GN33 is switched on or it will not protect the equipment as
intended – see fuse rating in section 10.10 Specifications.
10.5.3 NMEA0183 interface connection
NMEA0183 interface connection is made via the combined power and NMEA
cable.
10.5.4 Data transfer via NMEA connection
A PC or a second GN33 can be connected via the REMOTE port to enable
exchange of waypoint and route data.
For connection to PC, use 1.5 m data cable with 9 pin Sub-D connector, part
no. 153-6070-006. Illustration in section 10.6.1.
For interconnecting two GN33 units, use two alarm/data cables, part no. 153-
6070-001. Illustration in section 10.6.2.
10.5.5 External alarm and log connections
The port marked ECHO features two alarm relay output, alarm for missing
position update and general navigational alarm. Further, there is a log output
with 200 pulses per nm (5V 50mA). Use the alarm/log cable, part no. 153-
6070-005. Illustration in section 10.6.3.
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