Nmea 0183 Connection Diagrams - Garmin Reactor 40 Installation Instructions Manual

Wizard on the helm control or a compatible Garmin chartplotter
to configure the autopilot.
See the included configuration guide for more information on
configuring the autopilot.
Appendix

NMEA 0183 Connection Diagrams

The helm control is not included in all autopilot packages. A
helm control must be installed in your autopilot system to
connect NMEA 0183 devices according to these diagrams. If
you install the autopilot without a helm control, all NMEA devices
you plan to use with the autopilot system must be connected to
a compatible Garmin chartplotter on the same NMEA 2000
network as the CCU. See the installation instructions provided
with your chartplotter for NMEA 0183 connection information.
These wiring diagrams are examples of different situations you
may encounter when connecting your NMEA 0183 device to the
helm control.
NMEA 0183 Connection Considerations
• There is one internal NMEA 0183 input port (RX port) and
one internal NMEA 0183 output port (TX port) on the included
NMEA 0183 data cable. You can connect one NMEA 0183
device to the internal RX port to input data to this Garmin
device, and you can connect up to three NMEA 0183 devices
in parallel to the internal TX port to receive data output by this
Garmin device.
• See the installation instructions for the NMEA 0183 device to
identify the transmit (TX) and receive (RX) wires.
• The device provides one TX port and one RX port. Each
internal port has 2 wires, labeled A and B according to the
NMEA 0183 convention. The corresponding A and B wires of
each internal port should be connected to the A (+) and B (-)
wires of the NMEA 0183 device.
• You must use 28 AWG, shielded, twisted-pair wiring for
extended runs of wire. Solder all connections and seal them
with heat-shrink tubing.
• Do not connect the NMEA 0183 data wires from this device
to power ground.
• The power cable from this device and the NMEA 0183
devices must be connected to a common power ground.
• For two-way communication with a NMEA 0183 device, the
internal ports on the NMEA 0183 data cable are not linked.
For example, if the input of the NMEA 0183 device is
connected to TXA on the data cable, you can connect the
output port of your NMEA 0183 device to the input port on the
wiring harness.
• See Specifications, page 8
0183 sentences that are output by and input to this device.
• The internal NMEA 0183 ports and communication protocols
are configured on the connected Garmin device. See the
NMEA 0183 section of the chartplotter owner's manual for
more information.
for a list of the approved NMEA
Two-Way NMEA 0183 Communication
NMEA 2000 network (provides power to the helm control)
12 Vdc power source
Helm control
NMEA 0183 compatible device
Wire Helm Control Wire Color —
Function
N/A
N/A
Blue — Tx/A (+)
White — Tx/B (-)
Brown — Rx/A (+)
Green — Rx/B (-)
NOTE: When connecting a NMEA 0183 device with two
transmitting and two receiving lines, you do not need to connect
the NMEA 2000 bus and the NMEA 0183 device to a common
ground.
Only One Receiving Wire
If your NMEA 0183 compatible device has only one receiving
wire (Rx), you must connect it to the blue wire (Tx/A) from the
helm control, and leave the white wire (Tx/B) from the helm
control unconnected.
NMEA 2000 network (provides power to the helm control)
12 Vdc power source
Helm control
NMEA 0183 compatible device
Wire Helm Control Wire Color —
Function
N/A
N/A
Blue — Tx/A (+)
White — unconnected
NMEA 0183 Compatible
Device Wire Function
Power
NMEA 0183 ground
Rx/A (+)
Rx/B (-)
Tx/A (+)
Tx/B (-)
NMEA 0183 Compatible
Device Wire Function
Power
NMEA 0183 ground
Rx
N/A
7