4.4.3
Connection diagrams
Connection diagram for RLY3-OSSD2 with restart interlock and external device moni‐
toring
1
2
4
3
5
2) PELV
r
S
ys
te
m conne
c
ti
on
+24 V DC
OSSD1
OSSD2
0 V
n.c.
1
2
4
3
5
s
S
ys
te
m conne
c
ti
on
+24 V DC
In2
In1
0 V
n.c.
F2 F1
+24 V DC
0 V DC
K1
K2
E243749/01/2020-04-02
R1
Y1
Y2
24
A2
14
S1
I1
I2
23
A1
13
RLY3-OSSD2
k2
z
k1
k2
k1
z
x
y
x
1)
y
F0
L+
L–
deTec2 Core
deTec4 Core
k2
k1
S1
Figure 14: Connection diagram for RLY3-OSSD2 with restart interlock and external device moni‐
toring
1)
Output circuits: These contacts must be incorporated into the control such that the dan‐
gerous state is brought to an end if the output circuit is open. For categories 4 and 3, they
must be incorporated on dual-channels (x, y paths). Type 2 devices are suitable for use up
to PL c. Single-channel incorporation into the control (z path) is only possible with a single-
channel control and taking the risk analysis into account.
2)
SELV/PELV safety extra-low voltage.
Task
•
Connection of a multiple light beam safety device deTem4 Core to a RLY3-OSSD2
safety relay. Operating mode: With restart interlock and external device monitoring.
Mode of operation
•
When the light path is clear, the OSSD1 and OSSD2 outputs carry voltage. The sys‐
tem can be switched on when K1 and K2 are in a fault-free de-energized position.
The RLY3-OSSD2 is switched on by pressing S1 (pushbutton is pressed and
released). The outputs (contacts 13-14 and 23-24) switch the K1 and K2 contac‐
tors on. When the light path is interrupted, the OSSD1 and OSSD2 outputs switch
the RLY3-OSSD2 off. Contactors K1 and K2 are switched off.
Fault analysis
•
Cross-circuits and short-circuits of the OSSDs are recognized and lead to the lock‐
ing status (lock-out). A malfunction with one of the K1 or K2 contactors is
detected. The switch-off function is retained. In the event of manipulation (e.g.,
jamming) of the S1 pushbutton, the RLY3-OSSD2 will not re-enable the output cur‐
rent circuits.
4.5
Testing plan
The manufacturer of the machine and the operating entity must define all required
checks. The definition must be based on the application conditions and the risk assess‐
ment and must be documented in a traceable manner.
PROJECT PLANNING
4
8020453/14Q7/2020-04-27 | SICK
O P E R A T I N G I N S T R U C T I O N S | deTem4 Core
23
Subject to change without notice
