FF525 Installation Manual
Page 11
2.4
OPTIONAL CONNECTIONS
The FF525 is supplied with connections that allow the FF525 to be connected to the
following external devices:
a. NMEA device capable of listening to DBT, DPT, VHW, VLW, MTW
b. Temperature sensor (10K ohms at 77°F)
c. 12VDC Alarm Buzzer (400mA max current draw)
WIRE COLOR
BLAC
K
FUNCTION
RED
W
HIT
E
GREEN
GRAY
YELLOW
BROWN
BLUE
GND
Not connected
NMEA Output
(
+
)
NMEA GROUND
T
emp 2
I
NPU
T(
+
)
A
l
arm OU
T
PU
T(
+
)
Not connected
Not connected
ORANGE
Not connected
Not connected
P
I
N
K
Figure 2.4 - The FF525 Optional Connections
2.4.0 NMEA Output
The following sentences are output: DPT and DBT (Depth), VHW (Speed), VLW (Trip Log),
MTW (Water Temperature), XDR (External Temperature Sensor).
2.4.1 Alarm Buzzer
This connection has the capability to drive a buzzer that draws 400mA. Any 12VDC buzzer
within the current draw requirements can be connected.
2.4.2 Temperature Sensor
Any thermistor type temp sensor that produces 10K ohms at 77°F can be connected.
White
,
NMEA output
Green
,
common
B
l
ack
, g
round
Ye
ll
o
w,
E
x
t
. T
emp
s
en
s
or
B
l
ue
,
A
l
arm output
12VDC
Bu
zz
er
12V Battery
+
NMEA
De
v
ice
E
x
terna
l
T
emp Sen
s
or
Figure 2.4.2 - Optional Connections
