13-5
OP27, OP37 Equipment Manual
Release 05/99
13.1.2
Connecting the PLC
Figure 13-3 illustrates the basic connection possibilities between the OP and
PLC. Standard cables are available for the connections shown (refer to the
ST80.1 catalog).
TTY active
RS232
TTY passive
PU interface
SI 2
RS232
(9/25-pin)
RS422
(9-pin)
SIMATIC S5
TTY active
CP523
TTY active
RS232
TTY/RS232
converter
COM1/2
(9/25-pin)
RS232
PLCs of other
manufacturers
PU or PC
RS422
RS422/RS485
CPU
SIMATIC 500/505
PROFIBUS-DP
SIMATIC S7/M7
1)
RS232/TTY
1) Use only the approved cables for connection to SIMATIC S7/M7.
2) For operation via the serial interface, connect either IF1A (RS232/TTY) or IF1B
(RS422/485), but not both. The IF1B interface is configured by means of DIL swit-
ches.
3) Any PROFIBUS-DP bus terminal (except FSK)
3)
CP521 SI
IF1A
2)
IF1B
2)
OP
RS485
RS485
Figure 13-3 Connection configuration diagram for PLCs
Connection
configuration
Electrical Installation
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