the K1 and K2 contactors on. When the protective field is interrupted, the OSSD
1 and OSSD 2 outputs switch the RLY3-OSSD2 off. Lamp H1 lights up. Contactors
K1 and K2 are switched off. As soon as the protective field is clear again, lamp H2
flashes.
•
Fault analysis
Cross-circuits and short-circuits of the OSSDs are recognized and lead to the
locking 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
current circuits.
8-pin, RLY3-OSSD1 safety relay
3) PELV
F2
F1
+24 V DC
0 V DC
K1
K2
E324548/00/2021-09-29
k2
z
k1
k2
k1
z
x
y
x
1)
y
32
31
I1
I2
24
A2
14
23 13
RLY3-OSSD1
S
ys
te
m conne
c
ti
on
S
ys
tem connec
tion
+24 V DC
deTec4 SP1
2
1
3
5
6
4
7
8
r
RES
ADO
OSSD 1
OSSD 2
EDM
0 V DC
MFP 1
s
+24 V DC
n.c
In 2
In 1
n.c.
0 V DC
MFP 1
n.c.
2
3
4
5
6
1
7
8
2)
F0
L+
L–
H1
S1
Figure 38: Connection diagram: 8-pin, RLY3-OSSD1 safety relay
1)
Output circuits. These contacts must be incorporated into the control such that the
dangerous state is brought to an end if the output circuit is open. For categories 4 and
3, they must be incorporated on two channels (x, y paths). Single-channel incorporation
into the control (z path) is only possible with a single-channel control and taking the risk
analysis into account.
2)
To indicate the status on both sides, the MFP 1 connections from the sender and receiver
must be connected to each other in the control cabinet (optional).
3)
SELV/PELV safety extra-low voltage.
•
Task
Connection of a deTec4 safety light curtain to a RLY3-OSSD1 safety relay. Operat‐
ing mode: With restart interlock, external device monitoring (EDM), and application
diagnostic output.
•
Mode of operation
If the protective field is clear and the RLY3-OSSD1 is in a fault-free de-energized
position, the field indicator and the H2 lamp flash. The system can be switched
on. The system is enabled by pressing S1 (pushbutton is pressed and released).
4
PROJECT PLANNING
66
O P E R A T I N G I N S T R U C T I O N S | deTec4
8021645/1EB0/2022-04-28 | SICK
Subject to change without notice