Raymarine L1250DRC, Owner'S Handbook Manual

Page: 49 / 246

Chapter 2: Installation 2-17
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WARNING:
If the power connections are accidentally reversed the system will not
work. Use a multimeter to ensure that the input power leads are
connected for correct polarity.
Switch off the display unit before you remove the power cord.
The RED wire must be connected to the feed from the positive (+) battery
terminal and the BLACK wire to the feed from the negative (–) battery
terminal. The shielded wire (screen) should be connected to the ship’s RF
ground as previously described in
Ground Connection on page 2-20. Any
unused wires should be insulated and taped back.
Power for External Equipment
External equipment cannot be powered from the display’s SeaTalk
interface.
It must be powered from the ship’s supply or via a SeaTalk bus.
Refer to Section 2.9 for further details.
Transducer Connection
The transducer is connected to the DSM250, so this connector is left empty on
the display unit.
Pin No. Function Color
1 Channel 1 NMEA data input (+ve) Orange
2 Channel 1 NMEA return (-ve) Yellow
3 Battery negative Black
4 Shield (drain wire) No insulation
5 Battery positive (12/24/32 V systems) Red
6 Channel 2 NMEA data input (+ve) Green
7 Channel 2 NMEA return (-ve) Blue
81213_1.book Page 17 Monday, March 17, 2003 1:14 PM