Version 10.12.2019
page 6
WERAC Elektronik GmbH
Fig.2:
Diagram of connections for the external safety category 4 contacts
Attention:
In order to achieve the corresponding safety level, the external control of contact pairs 1 and 2
must also be carried out in accordance with Performance Level PL e, Category 4 in
accordance with EN ISO 13849-1.
5
Proposed wiring diagrams for the sequential switching
The contactors or relays actuated by the control unit must have positively driven contacts and
be suitable for industrial use.
IMPORTANT: When using plug-in auxiliary contacts, the positively driven operation must also
be available between the main contact set. It must also be checked whether disconnection of
the auxiliary block is detected by the controller. No further work on the machine may be
possible in such cases.
The spark suppression must always be connected via the contactor coil (by means of an RC
element or varistor).
5.1
Proposed wiring diagram for control unit WGN100, WGN 110 to Performance Level PL e,
Category 4 according to EN ISO 13849-1 on power-driven machinery (PDM) with start-up
test and restart lock
The control line for contactor A (terminals A1, A2), contactor B (terminals A5, A6) and the test
(T1, T2) must be laid in separate cables if the control unit and the contactors are spatially
separated. if both are located in the control cabinet, standard wiring is adequate. The user has
to provide a max. 2 A fuse for current-limiting measures to protect the output signal switching
devices (OSSD).
We will be pleased to supply you with other proposed wiring diagrams on inquiry.
0V
+24V
max. 2A
A1
T1
C
B
A
D
d
c
b
a
T
d
c
b
a
A2
A6
T2
WGN 100
WGN 110
reserve
b
d
a
c
x
m
a
x.
2
A
b
d
a
c
z
m
a
x.
2
A
b
d
a
c
y
m
a
x.
2
A
d
c
b
a
A4
A3
A7
A5
Fig. 3:
Proposed wiring diagrams for the sequential switching
Start enable 10-50V
0V
24V
mains
outputs
24V
AC or DC
T1
T2
transmitter
receiver
RJ 45
RJ 45
control unit WGN 110
A2
A3
A4
A1
A7
A5
A6
B2
B3
B4
B1
B7
B5
B6
B8
Input contact pair 1
Safety category 4
Input contact pair 2
Safety category 4
