Wiring(CM3 Serial)
- CIMON (Unlicensed)
Owned by CIMON (Unlicensed)
May 03, 2023
2 min read
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▶ Null Modem Wiring
DSUB | Connection | DSUB |
Pin | Pin | |
1 | 
| 1 |
2 | 2 | |
3 | 3 | |
4 | 4 | |
5 | 5 | |
6 | 6 | |
7 | 7 | |
8 | 8 | |
9 | 9 |
DSUB 9Pin Female |
Pin | Contents | Name |
1 | Carrier Detect | 1 |
2 | Received Data | 2 |
3 | Transmitted Data | 3 |
4 | Data Terminal Ready | 4 |
5 | Signal Ground | 5 |
6 | Data Set Ready | 6 |
7 | Request to Send | 7 |
8 | Clear to Send | 8 |
9 | Ring Indicator | 9 |
▶ Modem Wiring (Leased line modem, CDMA Modem)
Connect each pin 1:1 directly
CDMA Modem Wiring
DSUB | Connection | DSUB | ||
9-Pin | Name | Name | 25-Pin | |
1 | CD |
| CD | 8 |
2 | RXD | RXD | 3 | |
3 | TXD | TXD | 2 | |
4 | DTR | DTR | 20 | |
5 | SG | SG | 7 | |
6 | DSR | DSR | 6 | |
7 | RTS | RTS | 4 | |
8 | CTS | CTS | 5 | |
9 | RI | RI | 22 | |
※ If CDMA modem has 9-pin connector, please check the pin number both modem and PLC before wiring.
▶ RS422 Wiring
The first 2 modules are connected cross TX to RX and other stations are connected TX to
TX and RX to RX.
▶ RS-485 Wiring
Connect SDA to RDA and SDB to RDB and connect to other PLCs.