Operating Instructions Chapter #
8 009 874/31-03-03 © SICK AG • Industrial Safety Systems • Germany • All rights reserved
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In some applications it is at times necessary to mute the protective field evaluation of
the safety light curtain. This could be, e.g., in a safe machine setup mode, in which the
machine can be operated only at walking speed. When the bypass is active, the safety light
curtain displays Green and the 7-segment display of the receiver displays .
!5! 1
While the bypass function is active, the safety light curtain will not detect any intervention
in the protective field. You must ensure that other protective measures are forcibly acti-
vated during the bypass, e.g. the safe machine setup mode, so that the machine cannot
endanger persons or parts of the machine during the bypass function.
The bypass function may only be activated by a key-operated switch with an automatic
reset and two levels or by two input signals that are independent of each other, e.g. two
positioning switches.
It must be possible to view the entire hazardous point when pressing the key-operated
switch.
When you activate the bypass function, you can only connect a teach-in key-operated
switch (see page 24) directly to the C 4000, because the corresponding terminals of the
UE 402 are occupied by the key-operated pushbutton for bypass.
It is not possible to combine the bypass and PSDI mode functions.
The safety light curtain terminates the bypass function automatically, when …
– the operator starts a teach-in procedure.
– the operator changes the operating mode.
– there is a signal change at the Emergency Stop input on the C 4000.
– a system error (lock-out) occurs.
200 ms after switching off the bypass, the system is again in a safe status (latency time).
Device symbol C 4000 Host (receiver), context menu Configuration draft, Edit, selection of
the operating mode, file card General, option Bypass.
The connection of the key-operated pushbutton for bypass is described in chapter 5.3
“Key-operated pushbutton for bypass” on page 23.
the bypass function
WARNING
.
Bypass
Bypass
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