Micom P634 - Page 315

19Z6480C
First participant
connect. to the line
(e.g. the master)
Last participant
connect. to the line
Device with half-
duplex interface
P634
P634
XXXX
XXXX
D1[T]
D2[R]
D1[T]
D2[R]
200 ... 220 Ω
-X9/-X10
D1[T]D2[R]
-X9/-X10
D1[T]D2[R]
+
−
−
+
+
−
−
+
+− −+ +− −+
1
2
3
4
5
1
2 3
4 5
Fig. 5-13: 2-wire data link. (Note: the setting MAIN: Chann.assign.COMM1/2 decides about whether -X9
(=channel 1) or -X10 (=channel 2) is used.)
5 Installation and Connection P634
P634/EN M/R-42-A // P634‑311‑653 5-19