Siemens SIMATIC ET 200S Installation And Operating Manual page 72

Fail-Safe Modules
7.2 PM-E F pm DC24V PROFIsafe Power Module
Wiring Diagram
Each of the three digital outputs consists of a DOx P P-switch and a DOx M M-switch. They
connect the load between P and M-switches. The two switches are always controlled so that
voltage is applied to the load.
The wiring for the power module is carried out on the special terminal module.
Figure 7-6
Warning
Please use an external fuse for L+ at the PM-E F pm with the following properties to protect
the relay contact from overload: circuit-breaker of B characteristic as per IEC 947-5-1, 10 A.
Relay Output DO 2
The relay output DO 2 connects the voltage L+ and M using one relay contact for each. The
voltage is fed outwards to the terminal module and to the internal voltage buses P1 and P2.
This results in two connection options that can be used at the same time:
• A load can be connected directly to the terminal module (K2 in the figure above).
• Electronic modules can be supplied by means of the internal voltage buses P1 and P2.
7-12
Wiring diagram of the PM-E F pm DC24V PROFIsafe
Loads can be connected to these modules in turn (K3, K4, K5 in the figure above).
ET 200S Distributed I/O System - Fail-Safe Modules
Hardware Installation and Operating Manual, 07/2005, A5E00103686-04