User manual

NMEA 2000 to NMEA 0183 Gateway - NGW-1

Connecting to an RS232 (PC) Port

The NGW-1 can be connected to a PC communications

(RS232) port using the supplied cable and a connector

with the following specication:

1. A minimum of 3-cores are required in a shielded cable.

Higher quality cable will naturally yield higher performance/

higher Signal-to-Noise Ratio (SNR). Most typical cables

have two twisted pairs inside. In this case, use one pair for

the TX line and one for the RX line. Use the spare wire in

each pair as ground, and connect the cable shield to

ground only at the computer end.

2. A DB9 (9 pin D-type) type female (socket) connector for

the PC end of the cable.

3. The OUT +/A of the NGW-1 should be connected to the

RX of the computer (standard 9 pin D-type, pin 2) and the

NGW-1 IN +/A should be connected to the TX of the

computer (standard 9 pin D-type, pin 3).

4. Connect the IN -/B and OUT -/B together and connect

to the PC’s serial port ground (standard 9 pin D-type, pin

5).

Note: To change the port number used in Windows refer

to “Windows Port Number Conguration” on page 5.

Note: Refer to “Status LEDs” on page 10 for LED

behaviour.

Connecting to an RS485 (IEC 61162-2) Listening Device

The ISO-Drive output of the NGW-1 can be connected to an RS485 Listener that requires differential drive plus a

ground connection as shown in “Figure 3 – RS485 / IEC 61162-2 Port Connections”.

Note: Refer to “Status LEDs” on page 10 for LED behaviour.

Personal

Computer

( 9 PIN 'D'

RS232

Port)

Do not

connect

Pin 2

GND

Pin 5

Pin 3

Figure 2 – PC / RS232 Port Connections

RS485

Listener

A/+

B/-

GND

Figure 3 – RS485 / IEC 61162-2 Port Connections