![background image](http://html1.mh-extra.com/html/sick/rely-hand1/rely-hand1_operating-instructions-manual_1264572013.webp)
4.4.2
Application diagnostic output
Application diagnostic output Y1
The signal of the Y1 application diagnostic output changes as soon as the enabling cur‐
rent paths switch. The application diagnostic output is not safe.
Table 2: Switching behavior of application diagnostic output Y1
State of enabling current paths
State of application diagnostic output Y1
Closed
0 V
Open
24 V
4.4.3
External device monitoring (EDM)
External device monitoring (EDM)
With static external device monitoring, the safety relay tests whether the controlled
actuators (contactors) have dropped out when the device is switched on.
To use external device monitoring, you must connect the N/C contacts of the controlled
actuators in series with the external device monitoring input (S1).
If you are not using external device monitoring, you must connect the external device
monitoring input (S1) to supply voltage U
V
.
Further topics
•
4.4.4
Connection diagrams
K2
K1
I4
A1
A2
24
I3
14
S1
I1
I2
Y1
23
13
RLY3-HAND1
F2
S1
S2
F1
+24 V DC
0 V
L+
L–
k2
k1
F0
E213221/00/2018-11-15
State
Figure 4: ReLy HAND1 connection diagram
4.5
Testing plan
The safety relay must be thoroughly checked by appropriately qualified safety personnel
during commissioning, after modifications, and at regular intervals,
PROJECT PLANNING
4
8020872/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 HAND1
13
Subject to change without notice