FX312 & FX412 VERSION 2.0
MLR ELECTRONIQUE
70
E – INSTALLATION INSTRUCTIONS
1 – RECEIVER CASE
The receiver can be wall mounted, fitted to your chart table or under a shelf using the versatile
multi-position brackets. The receiver can also be flush mounted by using the flush mounting kit
available in option.
POWER SUPPLY
The FX312 and FX412 use 10 to 32 Volt DC supply. They are protected against reverse
polarity. A fuse is integrated into the power supply lead. Connect the cable as detailed below,
connect the red wire to the positive (+) and the blue wire to the negative (-).
DATA OUTPUT
The FX312 and FX412 have two data outputs: RS232 output for direct connection with a P.C.
and an RS422 (NMEA) output for navigation devices (autopilot, radar, plotter,…).
DATA INPUT
The FX312 and FX412 have one data input for loading waypoints from a P.C. or for the
connection with an external differential beacon receiver (DGPS).
CONNECTION WITH A P.C. AND WITH THE MLR DF300 DGPS RECEIVER
FX312/FX412 Wiring
FX312/FX412 Designation
DF300 Wiring
P.C. pins
Blue
- 0 Volt
Blue
Red
+10 to 36 Volts DC
Red
Brown or orange
Reference RS422 (NMEA OUT)
Yellow
Yellow
Output RS422 (NMEA OUT)
Green
Green
Reference RS232
Black
5
Black
Input RS232
White
3
White
Output RS232
2
The pin numbers for the P.C. SUBD connector (9 pin) are in the above table.
To interface the FX312/FX412 to an autopilot, plotter, sounder or radar, connect the brown (or
orange) wire and the yellow wire to the NMEA input of the external device.
Earthing the FX412 (only for the FX412)
Advice:
To obtain optimum reception of DGPS signal, it is recommended that where a earth
(ground) connection exists on a vessel it be connected to screw terminal on the rear of the
equipment via the green/yellow wire provided, taking the shortest route possible. Do not
hesitate to cut the earth wire to obtain the shortest length. See diagram.