Garmin Reactor 40 Hydraulic Autopilot Installation Instructions PDF - Page 7

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. Two-Way NMEA 0183 Communication 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 for a list of the approved NMEA 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. NMEA 2000 network (provides power to the helm control) À 12 Vdc power source Á Helm control  NMEA 0183 compatible device à Wire Helm Control Wire Color - Function N/A Ê N/A Ë Blue - Tx/A (+) Ì White - Tx/B (-) Í Brown - Rx/A (+) Î Green - Rx/B (-) Ï NMEA 0183 Compatible Device Wire Function Power NMEA 0183 ground Rx/A (+) Rx/B (-) Tx/A (+) Tx/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) À 12 Vdc power source Á Helm control  NMEA 0183 compatible device à Wire Helm Control Wire Color - Function N/A Ê N/A Ë Blue - Tx/A (+) Ì White - unconnected Í NMEA 0183 Compatible Device Wire Function Power NMEA 0183 ground Rx N/A 7