Siemens SIMATIC ET 200S Hardware Installation And Operating Manual page 209

Wiring diagram
Figure 2-4
Warning
* Please use an external fuse for the load current circuit with the following properties to
protect the relay contacts from overload and short circuiting: Fusible cutout, 6 A of the
operating class gL/gG
DC 24V-supply terminal
Connect the DC 24V control voltage to the IN P (terminals 3;7) and IN M (terminal 4;8). The
DC 24V-supply normally takes place via a PM-switching fail-safe output (e.g. EM 4F-
DO DC24V/2A PROFIsafe). For this purpose connect the P-output of the F-DO to the IN P of
the F-RO module and the M-output to the IN M of the F-RO-module.
As an alternative it is possible to make the connection to a PP-switching fail-safe output.
Please make sure that the external P connections on the P input cannot be controlled. In this
case IN M would be connected directly to the control voltage ground.
Product Information for the Distributed I/O System ET 200S, Fail-Safe Systems Manual
Product information, 07/2006, A5E00825271-01
Digital Electronics Module 1 F-RO DC24V/5A AC24..230V/5A
Wiring diagram of the EM 1 F-RO DC24V/5A AC24..230V/5A
2.4 Wiring of the EM 1 F-RO DC24V/5A AC24..230V/5A
2-7