Fail-Safe Modules
7.2 PM-E F pm DC24V PROFIsafe Power Module
ET 200S Distributed I/O System - Fail-Safe Modules
Installation and Operating Manual, 08/2008, A5E00103686-07
71
Application 1: Wiring a load to each digital output
The two switches are always energized so that voltage is applied to the load. The two
switches are always activated so that voltage is applied to the load.
Wire the PM using the special terminal module.
/ 0
/ 0
'2
0
'2
3
'2
0
'2
3
3
'2
3
30
33
. . . . . .
(0'2 (0'2 (0'2
3
'2
0
'2
3
'2
3
'2
3
'2
0
'2
0
'2
0
30()SP'&9
Figure 7-6 Wiring diagram of the PM-E F pm DC24V PROFIsafe
Note
In order to achieve SIL3/Category 4/PLe with this wiring, you must install a suitably-qualified
sensor, for example in accordance with IEC 60947.
WARNING
Please always use an external fuse for L+ at the PM-E F pm with the following properties to
protect the relay contacts from overload: Circuit-breaker, characteristics B, 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 also be used at the same time if desired:
● 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.
Loads can be connected to these modules in turn (K3, K4, K5 in the figure above)
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