Output Applications Of Em 4 F-Di/3 F-Do Dc24V Profisafe - Siemens PM-E F pm DC24V PROFIsafe Installation And Operating Manual

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.
Figure 7-45
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.
ET 200S Distributed I/O System - Fail-Safe Modules
Installation and Operating Manual, 08/2008, A5E00103686-07
7.6 EM 4 F-DI/3 F-DO DC24V PROFIsafe digital electronic module
Wiring Diagram EM 4 F-DI/3 F-DO DC24V - Output Circuit
Fail-Safe Modules
155