Raymarine L1250D, Owner'S Handbook Manual

Page: 53 / 246

Chapter 2: Installation 2-21
Tr
an
sd
uc
er
C
onne
ct
io
n
If your vessel has a dedicated ground strap available, you may alternatively
attach it to the ground wing nut on the rear panel of the module.
If your vessel does not have an RF system, connect the drain wire to the
negative battery terminal.
The DC system should be either:
• Negative grounded, with the negative battery terminal connected to the
ship’s ground.
• Floating, with neither battery terminal connected to the ship’s ground.
WARNING:
This system is not intended for use on “positive” ground vessels.
The power cable Ground (earth) connections must be connected to the
ship’s ground as described above.
Transducer Connection
A 30 ft (10m) cable is supplied with the transducer. The transducer cable may
be extended up to a maximum of 60 ft (20 m) using optional extension cables.
For details, see document number 81196,
Transducers for Fishfinders
Owner’s Handbook.
The transducer cable connector (and Y-shaped connector, if supplied) has a
nut that has been removed to aid installation. To enable you to complete the
installation without cutting the cable, ensure that any holes you drill are large
enough to accept the connector, with the nut removed (approximately 13/16"
or 21 mm).
WARNING:
Take care not to pull on the cable. This can damage the transducer wires.
Before attaching the transducer cable, you will need to attach the connector
nut and split ring. These items, plus a wedge tool, are included in the
transducer packaging.
The transducer cable is attached to the 7 pin male connector marked
TRANSDUCER
on the connector panel of the DSM250. How you connect the
cable depends on the type of transducer you have installed:
• Combined depth/speed/temp transducers (‘triducers’) have a 7 pin
female connector. Attach the transducer cable connector directly to the dis-
play unit.
• Combined speed/temperature transducers have a 3 pin female connector
that requires the use of an additional Y-shaped cable (Raymarine part num-
ber E66022) to attach to the 7 pin connector on the display. This Y-cable is
included with your speed/temperature transducer.
81213_1.book Page 21 Monday, March 17, 2003 1:14 PM