User manual

ZyWAN User Manual Getting started with your ZyWAN

Serial connections

Pin assignments for the serial ports are shown in the tables below.

COM1, COM2, COM3 (RS-232) .

Pin Signal Name

1 Data Carrier Detect (DCD)

2 Receive Data (RX)

3 Transmit Data (TX) *

4 Data Terminal Ready (DTR) *

5 Ground

6 Data Set Ready (DSR)

7 Request To Send (RTS) *

8 Clear To Send (CTS)

9 Ring Indicator (RI)

* = output signals

COM3 (4-wire RS-485/422)

Pin Signal Name

1 n/c

2 n/c

3 RS-485/422 TX-

4 RS-485/422 RX-

5 GND

6 n/c

7 RS-485/422 TX+

8 RS-485/422 RX+

9 GND