Serial connector pinout

The Connect EZ has an RJ45 (10 pin) serial connector. The table below contains the pinout information.

Altpin

If you enable Altpin in EIA-232 mode, the DCD and DSR signals are swapped. This allows use of DCD with 8-wire cables. Altpin has no impact on 422 or 485 mode.

Data+/Data- pins (in RS 485 half duplex mode)

For RS 485 cables in half duplex mode, you only need to connect one each of the Data+ and Data- pins.

     

MEI models only

 

MEI models only

 

10-pin

 

8-pin

 

EIA-232 Signals (DTE)

 

EIA-422/485

Full-duplex

EIA-485

Half-duplex

1   RI TxD- Data-
2 1

DSR (DCD*)

*When Altpin is enabled

RxD- Data-
3 2 RTS RTS+ N/A
4 3 GND GND GND
5 4 TxD TxD+ Data+
6 5 RxD RxD+ Data+
7 6 SG SG SG
8 7 CTS CTS+ N/A
9 8 DTR RTS- N/A
10  

DCD (DSR*)

*When Altpin is enabled

CTS- N/A