Garmin CS 1522 Owner's Manual page 24

• 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 NMEA 0183 Information, page 6 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 0183 Device Connections
This diagram illustrates two-way connections for both sending and receiving data. You
can also use this diagram for one-way communication. To receive information from a
NMEA 0183 device, refer to items
To transmit information to a NMEA 0183 device, refer to items
connecting the Garmin device.
B
Item
DC Power supply / battery
A
Power / NMEA 0183 cable
B
NMEA 0183 device
C
Item
Red
Black
Black
Brown
Violet
Blue
Gray
22
Garmin Wire Color
, , , , and when connecting the Garmin device.
A
Description
Garmin Wire Function
Power supply +
Power supply - / ground Power supply - / ground
Data ground
RXA (+)
RXB (-)
TXA (+)
TXB (-)
, , , , and
C
NMEA 0183 Device
Wire Function
Power supply +
Data ground
TXA (+)
TXB (-)
RXA (+)
RXB (-)
CHAPTER 1 INTRODUCTION
when