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Structure and function
Input/output configuration options (secondary side)
3
39 | 72
Building Technologies
009122_h_en_--
Fire Safety
2016-05-04
Circuit
The graphic below shows the various circuit options available for contact inputs:
Figure 9: Circuit for contact inputs
1…3 Monitoring for open line and
short circuit
4 Monitoring for open line only
Recommendation: Install a 40 mAT fuse as shown in the graphic to protect the
monitoring resistors from commissioning errors.
The contact inputs must be potential-free.
2
3
4
1
2.7 k
560
+
I/O
FDCIO223
560
2.
7
k
3.
3
k
68
0
3.
3
k
40 mAT