WARNING!
●
Not fully functional emergency stop devices may have fatal consequences!
Emergency stop switches which are red-yellow marked must be effective
under all circumstances in all operating modes of a machine or plant.
Store handheld terminals with not operational red-yellow emergency stop
switches on a place where the operator cannot see it, so that he can not
mistake the device.
Handheld terminals which are plugged in and out frequently for temporarely
use, must not have a red-yellow emergency stop switch. Such devices must
be equipped with a grey stop switch.
●
Resetting an activated emergency stop facility must not result in uncon-
trolled start-up of machines or installations.
●
The emergency stop button does not replace other safety facilities.
●
The emergency stop button on the handheld terminal does not replace the
emergency stop buttones to be mounted directly on the machine.
●
Some mechanical errors in emergency stop switches can be recognized at
operation only.
Test the function of the emergency stop switch when the device had been
exposed to mechanical shock (e.g. it had been fallen on the ground).
Additionally the emergency stop switch must be tested cyclic (6 monthly).
Watch the machine stopping after the emergency stop switch had been
pushed.
●
For further informations to emergency stop switch observe chapter "Direc-
tives and Standards".
6.3
Enabling Control Device
The KeTop is equipped with one enabling control device. The enabling control
device consists of a 3-position operating element. An essential feature are the
two-channel circuits and the forced opening according to EN 60947-1 and EN
60947-2 to the third switch position.
6.3.1
Functioning
The enabling control device can be in the following three positions:
Position
Function
Enabling control
device
Contacts
1
home position
is not pressed
enabling outputs are
open
2
enabling
is pressed
enabling outputs are
closed
3
panic
is pressed strong
enabling outputs are
open
KeTop T10
Connection and wiring
© KEBA 2014
Project engineering manual V1.02
29
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