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Operating instructions
Chapter
3
Flexi Classic
8011509/YPP0/2015-10-26
© SICK AG • Industrial Safety Systems • Germany • All rights reserved
31
Subject to change without notice
Product description
Test the entire emergency stop function after any change to the wiring!
If a UE410-GU is subsequently removed from an emergency stop system and the system is
then correctly wired, this change will not be detected. For this reason the entire emergency
stop function must always be tested after any change to the wiring.
Stand-alone mode of a UE410-GU
It is also possible to operate a UE410-GU as a standalone device. For this purpose X1
must be wired to I
P
and X2 must be wired to I
N
on this device.
3.4.4
Local emergency stop on the UE410-GU
A local emergency stop can be configured on each UE410-GU depending on the program
set (see section 3.7 “UE410-GU programs” on page 49).
Principle of operation
If the local emergency stop is activated on a UE410-GU (falling edge on I3 and/or I4, de-
pending on the program set), this module sets its safety output Q1 to low. The signals O
P
and O
N
remain high, i.e. the local emergency stop only acts on the safety output on the
UE410-GU on which the local emergency stop was triggered.
Once the cause of the local emergency stop has been rectified (inputs I3 and I4 are high
again, e.g. protective field clear), the safety output Q1 on the module switches to high
again after a successful reset.
Reset
A local emergency stop can be reset either manually or automatically depending on the
program set:
•
Automatic reset: Once the local cut-off path is closed again (e.g. protective field clear),
then the safety output Q1 on the module also switches to high again.
•
Manual reset: Once the local cut-off path is closed again (e.g. protective field clear),
output Q2 starts to flash at 1 Hz. If the reset button is then operated, the safety output
Q1 on the module switches to high again.
The following conditions are to be noted for the manual reset:
•
Only the falling edge is evaluated.
•
The minimum actuation time for the reset button is ≥ 50 ms.
•
The maximum actuation time for the reset button is ≤ 5 s.
If one of these criteria is not met, the emergency stop is not reset.
WARNING