BV 7055 (0509)
176
Table 1: Pin assignment of the interface RS 485, 9-pole
Pin RS 485 Signal Function
1- - -- - -
2 RP 5 V, decoupled with diodes
3 A/A’ RxD/TxD-A Receive/Transmit data A
4 CNTR-A Control signal A
5 C/C’ DGND Data reference potential
6 VP 5 V, positive pole of supply voltage
7- - -- - -
8 B/B’ RxD/TxD-B Receive/Transmit data B
9 CNTR-B Control signal B
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