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Operating Instructions (Compact) OP 77B
6AV6691-1EA01-0AB0
1–5
O
vervi
ew
1.5 Description of Interfaces
Power supply
2
1
Plug
connector,
2-pin
Pin
Assignment
1
+24 V DC
2 GND
Figure 1–5
Pin assignment for power supply
RS 422/RS 485 (IF 1B)
1
5
9
6
Sub-D socket, 9-pin,
secured by screws
Pin
Assignment with
RS 422
Assignment with
RS 485
1
N. c.
N. c.
2 M
M
3 TxD+
LTG-B
4 RxD+
RTS-AS
5
GND, potential-free
GND, potential-free
6
DC +5 V, potential-free
DC +5 V, potential-free
7
DC 24 V in
DC 24 V in
8 TxD-
LTG-A
9 RxD-
RTS-AS
Figure 1–6
RS 422 and RS 485 interface pin assignments