Garmin GSD 21 - Manual (Page 8)

6 GSD 21 Sonar Module
I
NSTALLATION
I
NSTRUCTIONS
W
IR
E
C
O
LO
R
GARMIN GSD 21
SOUNDER MODULE
BL
AC
K
O
R
AN
G
E
R
ED
W
H
IT
E/
BL
U
E
BL
AC
K
R
ED
BL
U
E
YE
LL
O
W
W
H
IT
E/
BR
O
W
N
W
IR
E
C
O
LO
R
FU
SE
1.
5A
FU
SE 2A
TO
TRANSDUCER
ON OFF
SEE NOTE 3 OPTION 1
ON
OFF
SEE NOTE 3 OPTION 2
BA
TT
ER
Y
10
-3
5
VO
LT
S
D
C
Serial W
iring for the Garmin GSD 21 to a Single GPSMAP
276C/296/376C/396
Notes:
1.
You can extend the serial/power wiring of the GSD 21 power/data cable up to 100 ft (30 m) total length. Use the CANet Extension Cable or 22
AWG, 4-conductor shielded cable for data connections and 18
AWG for power
.
2.
Ground the drain wire at the display unit. Do not ground the drain wire on the sonar unit.
3.
The Orange wire must be pulled low (-) in order for the GSD 21 to power on. Option 1: If the GSD 21 is wired to a circuit that is switched on the Red (+) wire, connect the Orange wire to ground. The GSD 21 and the GPSMAP
276C/296/376C/396 turn on or of
f when power is applied or removed form the Red wire.
Option 2: If the Red (+) wire is applied directly to a power source, install a switch between the Orange wire and ground. The GSD 21 turns on or of
f when ground is applied or removed from the Orange wire.
4.
When crimping the 3-wire connector
, use a standard pair of pliers and make sure the button is fully depressed into the
connector
.