FP2−CCU | RS232C Port Wiring |
4.2 Wiring between RS232C Ports
4.2.3Connections with RS232C Devices
Connections with an RS232C device that has a D−sub 9−pin connector should be made as follows.
Computer Communication | RS232C side (9−pin) | ||
Unit side |
| ||
| Pin No. Mnemonic | ||
Pin No. Mnemonic | |||
1 | FG | 1 | FG |
2 | SD | 2 | SD |
3 | RD | 3 | RD |
4 | RS | 4 | RS |
5 | (CS) | 5 | CS |
6 |
| 6 | DR |
7 | SG | 7 | SG |
8 | (CD) | 8 | CD |
9 | ER | 9 | ER |
Tip
−The “CS” and “CD” signals from the partner device are set invalid on the Computer Communication Unit side, so no connections are necessary.
−Depending on the RS232C device, there may be times when the device will not operate properly if the “CS” and “CD” signals do not go on, so the “RS” and “CS” signals and the “ER” and “CD” signals on the RS232C device side should be shorted.
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