Siemens SIMATIC ET 200eco Manual page 56

Digital F I/O Module
Block Diagram
The representation of the NO contacts is as printed on the module. Generally,
*
however, the sensor contacts must be NC contacts (due to safe state of the
process variables).
Figure 8-2 Block Diagram of the ET 200eco 4/8 F-DI
8-4
DP address switch
F address switch
SF
BF
ON
5
24
P1
P2
0
1
2
M
3
Test
Filter logic
Status
M
4
5
6
7
ET 200eco Distributed I/O Station Fail-Safe I/O Module
*
Vs1
*
Vs2
A5E00297494-02