System Manual HS3A-H21M4
18
GND
24 V DC
IB
1
U
B
2
O
A
3
O
B
4
M12 plug-connector
(8-pin)
O
U
T
5
IA
6
0
V
7
R
S
T
8
-K1
-K2
-M1
M
+
-
+
-
GND
24 V DC
HS3A #1
IB
1
U
B
2
O
A
3
O
B
4
M12 plug-connector
(8-pin)
O
U
T
5
IA
6
0
V
7
R
S
T
8
-K1
-K2
-M1
-M2
M
M
+
+
-
Connection of a single HS3A
If a single HS3A is used, connect the device as shown in Figure 7. The OUT output
can be connected routed to a control system as a monitoring output.
The switch can be reset via the RST input. To do this, a voltage of 24 V DC is
applied to the RST input for at least 3 seconds. The RST input must be con-
nected to 0 V DC if it is not used.
Important!
The subsystem HS3A complies with PL e in accordance with EN ISO13849-1. To
integrate the subsystem in a category 3 or 4 structure, it is necessary to monitor
the downstream load (the feedback loop must be monitored).
These examples show only an excerpt that is relevant for connection of the HS3A
system. The example illustrated here does not show complete system planning.
The user is responsible for safe integration in the overall system.
Figure 7: Connection example for a single HS3A
Warning!
In case of an error, loss of the safety function through incorrect connection.
To ensure safety, both safety outputs (OA and OB) must always be evalu-
ated. Single-channel use of the safety outputs leads to a loss of the cate-
gory in accordance with EN ISO 13849-1.
Figure 8: Example of incorrect connection
HS3A #1
