Siemens SIMATIC ET 200S - Changing the type of an electronic module; Replacing a defective electronic module

Fail-Safe Modules
7.6 EM 4 F-DI/3 F-DO DC24V PROFIsafe digital electronic module
ET 200S Distributed I/O System - Fail-Safe Modules
Installation and Operating Manual, 08/2008, A5E00103686-07
155
7.6.6 Output applications of EM 4 F-DI/3 F-DO DC24V PROFIsafe
Application 1: Wiring a load to each digital output
Each of the three fail-safe digital outputs consists of one DOx P P-switch and one DOx M M-
switch. You connect the load between P and M-switches. The two switches are always
activated so that voltage is applied to the load.
The wiring is carried out on an appropriate terminal module.
30(
)',)'2
/ 0
/ 0
3 0
'2 '2 '2 '2 '2 '2
. . .
3 0 3 0
Figure 7-45 Wiring Diagram EM 4 F-DI/3 F-DO DC24V - Output Circuit
Note
In order to achieve SIL2/Category 3/PLd with this wiring, you must install a suitably-qualified
actuator, for example in accordance with IEC 60947.
Application 2: Wiring loads to L+ and M at each digital output
Not allowed.