Operating Instructions
Light Grids/Light Curtains LCA 2
56
(translation of the original operating instructions) 2504708-03-02/21
6.4. Safety outputs
The receiver unit has the two safety outputs FO1A/FO1B (PNP outputs).
You can find the detailed switching states for your device in the table below.
Any short circuits between the outputs and the 24
V
DC or 0
V
DC supplies are detected by the device itself.
Table 3: Switching states
Signal name
Conditions
Meaning
FO1A
24 V DC
Ì
Protected area clear
FO1B
FO1A
0 V DC
Ì
Condition: protected area occupied/faulty or
Ì
Fault detected
FO1B
Important!
If the protected area is clear,
the receiver delivers a voltage of 24 V DC on both outputs. The necessary
load must therefore be connected between the safety outputs and 0 V DC (see Figure 4).
To ensure safety, both safety outputs (FO1A/FO1B) must always be evaluated.
FO1A
FO1B
Max. load
400 mA
R
0 V DC
L
L
FO1A
FO1B
Max. load
400 mA
R
24 V DC
L
L
Figure 4:
Connection of the load to the safety outputs and 0 V DC
Summary of Contents for LCA 2 Series
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