![Arcom ZyWAN Скачать руководство пользователя страница 19](http://html.mh-extra.com/html/arcom/zywan/zywan_user-manual_2964783019.webp)
ZyWAN User Manual
Getting started with your ZyWAN
© 2008 Arcom Issue D
19
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