13
SICK WSU 26/2 – WEU 26/2
8 008 692/9-12-99 Technical Description · WSU/WEU 26-2 © SICK AG · Safety Systems · Germany · All rights reserved
Before connection, check that the
supply voltage and mains frequency
on-site are consistent with the
specifications on the rating plate.
The cable is fed through the PG
connector and connected inside the
device, or connected to the
equipment plug. The wiring diagram
is depicted again on the housing
cover of the respective device.
The enclosure rating for the devices
can only be guaranteed when the
cable is properly clamped in the PG
connector and the housing seals fit
perfectly. Where long leads are
used, the cable cross-sections
should be chosen to ensure the
devices are always supplied with
the required voltage (see Technical
Data).
7 Electrical Connection
7.1 General Introduction
Depending on type, the WSU/WEU
26/2 photoelectric safety switch is
available for a supply voltage of
‡
24 V DC
‡
115 V AC or
‡
230 V AC.
The rating plate gives details.
At least two outputs must be
connected to the downstream
machine controller (
Fig. 20/21
).
Each of the two outputs (NO
contacts) must be assigned an
electromagnetic switching element.
7 Electrical Connection
Arc-suppression elements are essential under inductive load!
Arc-suppression elements must be connected in parallel with
the inductance. Connection in parallel with the output contact
is not permitted.
Diodes must
not
be used as arc-suppression elements.
Tab. 3: Overview for arc-suppression elements
Guide values for arc-suppression elements
Operating voltage Order no.
R
C
V
Ω
µ
F
115 ... 230
6 001 224
220
0.22
24
6 001 225
100
2.2
Plastic-encapsulated; connecting wires NYAF 0.5
dia. with cable lugs; mounting with adhesive tape
or cable tie.
The two system components must
be of the same voltage version and
the same scanning ranges.
Single- or fine-wire conductors up
to 1.5 mm
2
can be connected to
the screwless terminals (to VDE
0607). Stripping length: 11 mm.
Operating
voltage
C
R
Contact
in WEU
Consumers,
contactor
The electrical connection of the WSU/WEU must only
be made or changed with the power disconnected.
Unscrew the housing cover to connect the WSU/WEU
with a PG connector.