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
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MEI models only
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10-pin
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8-pin
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EIA-232 Signals (DTE)
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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 |