SICK C4-RD User Manual

4.4.3 Connection diagrams
Connection diagram for RLY3-OSSD2 with restart interlock and external device moni‐
t
oring
1
2
4
3
5
2) PELV
r
System connection
+24 V DC
OSSD1
OSSD2
0 V
n.c.
1
2
4
3
5
s
System connection
+24 V DC
n.c.
n.c.
0 V
n.c.
F2 F1
+24 V DC
0 V DC
K1K2
E275730/02/2020-07-10
R1 Y1 Y2 24A2 14
S
1 I1 I2 23A1 13
RLY3-OSSD2
k2
z
k1 k2
k1
z
x
y
x
1)
y
F0
L+
L–
C4-RD
k2
k1
S1
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 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.
•
T
ask
Connection of a C4-RD safety light curtain to a RLY3-OSSD2 safety relay. Operating
mode
: With restart interlock and external device monitoring.
•
Mode of oper
ation
When the protective field is clear, the OSSD1 and OSSD2 outputs carry voltage.
T
he system 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
contactors on. When the protective field is interrupted, the OSSD1 and OSSD2
outputs switch the RLY3-OSSD2 off. Contactors K1 and K2 are switched off.
•
F
ault analysis
Cross-circuits and short-circuits of the OSSDs are recognized and lead to the
loc
king 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.
4.5 Testing plan
The manufacturer of the machine and the operating entity must define all required
c
hecks. 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
8025644/19Z2/2021-03-09 | SICK O P E R A T I N G I N S T R U C T I O N S | C4-RD
25
Subject to change without notice

SICK C4-RD Specifications

General

Brand	SICK
Model	C4-RD
Category	Lighting Equipment
Language	English