CM3 Ethernet Communication Module Wiring Guide
CM3-SP02ERR
CM3-SP02ERS
Pin Names
| Serial Pin Name | |
|---|---|
| Number | Name |
| 1 | Carrier Detect |
| 2 | Received Data |
| 3 | Transmitted Data |
| 4 | Data Terminal Ready |
| 5 | Signal Ground |
| 6 | Data Set Ready |
| 7 | Request to Send |
| 8 | Clear to Send |
| 9 | Ring Indicator |
RS-232 Wiring Guide
Null Modem
Modem
This is supported for leased line and CDMA modem.
If CDMA modem has 9-pin connector, please check the pin number of the modem and PLC before wiring.
RS-422 Wiring Guide
The first 2 modules are cross connecting TX to RX, and the other stations are connecting TX to TX and RX to RX.
RS-485 Wiring Guide
Connect SDA to RDA and SDB to RDB, then connect to other PLCs.