4
Product description
4.1
Construction and function
The safety relay ReLy OSSD4 is an electrical switching device with inputs and outputs.
The safety capable inputs of the safety relay are connected to safety sensors.
2 safety capable inputs control the internal relays, which are used to reliably switch the
enabling current paths.
Actuators with positively guided contacts are connected to the enabling current paths.
4.2
Product characteristics
4.2.1
Device overview
R
E
L
Y
1
2
3
4
CH1
CH2
13
23
43
I1
14
24
44
I2
A2
51
33
52
34
61
62
Figure 1: Device overview
1
Device unlocking
2
LEDs
3
Front connector unlocking
4
Front connector
4.2.2
Interfaces
Inputs
•
2 safety capable inputs
Outputs
•
4 enabling current paths (safe)
•
Feedback current path (for use as external device monitoring, not safe)
4.2.3
Compatible sensor types
The safety relay is suitable for:
•
Safety sensors and safety switches with OSSD output, e.g. Electro-sensitive pro‐
tective equipment (ESPE) with a single-channel or dual-channel monitored active
switching output with cross-circuit detection (OSSD) and safety controllers with
monitored semiconductor outputs
4
PRODUCT DESCRIPTION
10
O P E R A T I N G I N S T R U C T I O N S | ReLy OSSD4
8026008/2020-07-28 | SICK
Subject to change without notice
