Figure 5. Simplified RS-232 Schematic
RS-422/485 Slave Port Option
The RS-232 transmit and receive data signals on the Master port will be converted to balanced, full-duplex RS-422 or half-duplex RS-485 signals with this option. The 232D4SS8 comes standard with four RS-485 (2 or 4-wire) slave ports. Refer to Appendix B for cable charts.
Table 5. RS-422/485 PORTS A - H
| | | | RS-422/485 | |
| | | | Signal | |
| Pin # | Signal | Description | Direction of | |
| | | | Ports A - H | |
| 15 | TD(A) | Transmit Data (-) | Output | |
| 14 | TD(B) | Transmit Data (+) | Output | |
| 7 | SG | Signal Ground | <------> | |
| 17 | RD(A) | Receive Data (-) | Input | |
| 16 | RD(B) | Receive Data (+) | Input | |
| | | | | |
10 | | | Documentation Number 232D4SS84502 Manual |
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