Control elements
© Siemens AG 2003 All Rights Reserved
4-36 SIMOTION Safety Unit (AP) - Edition 06.2003
Example of wiring
Restart
lockout acknowledge
(if required)
L+
M
PE
Light path
unobstructed
X3.8
X4.8
Warning!
Clocking may not be connected
to the control unit side.
1
2
7
1
2
7
3
4
4
3
OSSD1
OSSD2
Output of Safety Unit
X2.x (L+)
Figure 4-7 Light curtain
4.5.5 Restart inhibit of light curtain in safety mode
The restart inhibit is activated in the event of an intervention during a hazardous
movement. This is indicated by the flashing of the fault lamp.
It is reset by means of the acknowledge button for group acknowledgement.
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