DS74 Serial I/O Module
Cabling
RJ-45 Cables and Adapters
DS74 EIA-232 RJ-45 Signal
Pin | EIA 232 | Signal |
| Signal | Direction |
1 | DTR | Out |
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2 | GND |
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3 | RTS | Out |
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4 | TX | Out |
5 | RX | In |
6 | DSR | In |
7GND
8CTS In
Description
Handshake, Line Driver Inactive State = Low:
Signal Ground
Handshake, Line Driver Inactive State = Low:
Transmit Data Out
Receive Data In
Handshake In. +12V when not used. Signal Ground
Used as a handshake line to enable/disable the receiving of characters.
Adapters Signals
Listed are the pin specifications for the BayTech cable and adapters and the terminal COM ports:
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| Signal |
| COM Port | COM Port |
| Signal | |
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| Port (DS) | Port (RPC) |
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| DTR | 1 | 1 | 4 | 20 |
| DSR |
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| GND | 2 | 2 |
| 1 |
| GND |
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| RTS | 3 | 3 | 7 | 5 |
| CTS |
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| TXD | 4 | 4 | 3 | 2 |
| RXD |
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| RXD | 5 | 5 | 2 | 3 |
| TXD |
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| DSR | 6 | N/C | 6 | 6 |
| DTR |
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| GND | 7 | 7 | 5 | 7 |
| GND |
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| CTS | 8 |
| 8 | 4 |
| RTS |
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| DTR |
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| 4 |
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| DCD |
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| DCD |
| 8 | 1 | 8 |
| DTR |
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| RI | 9 |
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| 22 |
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