SICK MSLZ 01-15031

20
SICK MSL
8 007 653/09-04-01 Technical Description • MSL © SICK AG • Safety Systems • Germany • All rights reserved
1
2
3
4
5
6
7
8
+24 V
0 V
OSSD1
OSSD2
RES
EDM
OWS
Fig. 21: Wiring diagram of the receiver unit
or MSLZ
7.3 Receiver unit
The electrical connection diagram
of the receiver unit and the MSLZ is
shown in
fig. 21 .
7.3.1 Switching outputs
Both outputs OSSD 1 and OSSD 2
are actively monitored, short-circuit
proof PNP semiconductor outputs.
The outputs can be loaded with a
maximum of 0.5 A and are not
floating, but are referenced to 0 V.
For unobstructed light beams, both
outputs are active HIGH. The
output voltage U
a
of both channels
is dependent on the supply voltage
U
v
and the switched load, and is at
least
U
a
³ U
V
– 3 V
7.3.2 Output: Contamination
warning (OWS)
The contamination warning output
(OWS = Output Weak Signal) is a
short-circuit proof PNP semi-
conductor output which is active
(HIGH) for an unobstructed but
weak light beam (
fig. 22 ). This
output is not floating but is
referenced to 0 V.
The OWS outputs of several MSLs
can be connected together to
one
signal receptor or a PLC input. Par-
allel switching of several MSL
contamination warning is possible
("wired OR").
The maximum output current is
100 mA.
Fig. 22: The contamination warning output
+24V
7
OWS
Voltage at output
(standard implementation)
Light barrier contaminated + 24 V
Light barrier not contaminated 0 V
Note
Connection of the receiver
outputs OSSD 1 and OSSD 2
(fig. 23)
‡ An additional supply voltage
must not be applied to the
outputs
‡ Both output signals must be
processed separately. They
must not be connected in
series or parallel