Lowrance electronic LMS-337C DF - Manual (Page 45)

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LMS-332 and LMS-337CDF cable connections.
Mounting the Unit: Bracket, In-Dash or Portable
You can install your unit on the dash with the gimbal bracket. It can
also be installed in the dash or mounted on a portable power supply.
If you use the supplied bracket, you may be interested in the optional
R-A-M

bracket mounting system. This converts the unit's gimbal
bracket to a swivel mount, which can be used on the dash or overhead
mounting positions.
LMS-337CDF,
rear view
GPS
antenna
module
Network socket
Power/Data socket
Power Supply
cable
NMEA 0183
Data cable
(four wires)
Sonar socket
Transducer
NMEA 2000
Power cable
60-ohm
terminator
LGC-2000 25'
extension cable
SP-BL optional
speed sensor