SICK ReLy EMSS1 - 3 Product Description; Construction and Function; Product Characteristics; Device Overview

3 Product description
3.1 Construction and function
The safety relay ReLy EMSS1 is an electrical switching device with inputs and outputs.
T
he safety capable inputs of the safety relay are connected to safety sensors or safety
switches.
2 safety capable inputs control the internal relays, which are used to reliably switch the
enabling current paths.
The enabling current paths close only when the two safety capable inputs close within
3 s of one another.
Actuators with positively guided contacts are connected to the enabling current paths.
3.2 Product characteristics
3.2.1 Device overview
PWR
OUT
1
3
2
3
I1
Y1
14
2
4
I2
Y2
A2
RELY
1
2
3
4
S1
X1
A1
R1
X2
Figure 1: Device overview
1
Device unlocking
2
LEDs
3
Front connector unlocking
4
Front connector
3.2.2 Interfaces
Inputs
•
2 s
afety capable inputs
•
Input for reset pushbutton or external device monitoring
Outputs
•
2 enabling current paths (safe)
•
2 application diagnostic outputs (not safe)
•
3 test outputs (not safe)
PRODUCT DESCRIPTION 3
8020868/ZX84/2018-11-15 | SICK O P E R A T I N G I N S T R U C T I O N S | ReLy EMSS1
9
Subject to change without notice