≥ 50
≥ 50
≥ 25
Figure 3: Distances in control cabinet
Required distance:
•
Above and below the module: ≥ 50 mm
•
In front of the module: ≥ 25 mm
5.4
Electrical integration
Important information
NOTE
The device achieves overvoltage category III if feedback current path 31/32 is supplied
by the same voltage supply as the upstream OSSDs (safety extra-low voltage). Con‐
nected devices must be also have overvoltage category III.
5.4.1
Enabling current paths
DANGER
Hazard due to lack of effectiveness of the protective device
b
Ensure the enabling current paths are supplied by the same voltage supply.
5.4.2
Feedback current path
The feedback current path is used as external device monitoring for the monitoring by
the base device.
The status of the feedback current path (61, 62) and the signaling current path
changes as soon as the safe enabling current paths (13, 14, 23, 24, 33, 34, 43,
44) switch. The feedback current path is not safe.
Table 3: Switching behavior of feedback current path
State of enabling current paths
State of feedback current path
Closed
Open
Open
Closed
PROJECT PLANNING
5
8026008/2020-07-28 | SICK
O P E R A T I N G I N S T R U C T I O N S | ReLy OSSD4
13
Subject to change without notice
