SICK LE20 Instrucciones De Operación página 310

Chapter 5
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Electrical installation
Relay module
The supply connections of the safety evaluation unit have two
semiconductor outputs (max. output current 0.5 A). If the switching
capacity is insufficient or volt free contacts are required, a relay
module with two volt free relay contacts can be connected.
Fig. 5-2: Terminal assignment of the relay module
Pin-No. Marking
1 IN 1
COM
2
3 IN 2
4 Monit. A
5 Monit. B
6 OSSD 1 B
7 OSSD 1 A
8 OSSD 2 B
9 OSSD 2 A
Tab. 5-4: Terminal assignment of the relay module
Safety Evaluation Unit LE 20
Meaning (O = output, I = input)
I: Connection to OSSD 1 from LE 20 interface
Connection to 0 V
I: Connection to OSSD 2 from LE 20 interface
O: Relay output, connect side A of NC contact to
24 V DC
O: Relay output, connect side B of NC contact to
EDM of LE 20 interface
O: Relay output, side B of NO contact of output
relay 1
O: Relay output, side A of NO contact of output
relay 1
O: Relay output, side B of NO contact of output
relay 2
O: Relay output, side A of NO contact of output
relay 2
8 008 685/Q913/2007-05-21
Operating Instructions