Actisense USG-1-B-485 Manual de usuario descargar pdf (Pagina 9)

USB to Serial Gateway - USG-1-B-422

Connecting to a Personal Computer RS232 port

Figure 3 – Personal Computer / RS232 port connections

The USG-1 can be connected to a PC communications port

using a cable conforming to the following specication:

1. A D-type female (socket) connector for the PC end of

the cable

2. 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.

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

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

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

the computer (pin 3).

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

to the PC’s serial port ground (pin 5).

Do not

connect

Personal

Computer

( 9 PIN 'D'

RS232

Port)

Pin 2

GND

Pin 5

Pin 3

Connecting to a 3-pin RS485 Listener

Figure 4 – RS485 port connections

The USG-1 ISO-Drive output can be connected to an

RS485 Listener that requires differential drive plus ground

as shown in gure 4.

RS485

Listener

A/+

GND

B/-

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

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Actisense USG-1-B-485 Manual de usuario Pagina 9