Keba KeTop T100 - Emergency Stop Button and grey Stop Button

Connection KeTop T100
20 User's Manual, version: 3.1 / material no.: 57448
© KEBA 2006
Emergency Stop Button and grey Stop Button
The emergency stop button respectively the grey stop button used on the
KeTop features two circuits. The contacts are normally closed.
The red-yellow emergency stop button of the handheld terminal meets the
requirements of the EN 418. It must be designed as an emergency stop of
category 0 or category 1 (see EN 60204-1 chapter 9.2.5.4.2) on the basis
of the risk assessment for the machine. The connection of the positive-
break contacts to an appropriate monitoring system must meet the safety
category which is defined by means of the risk assessment (in accordance
with EN 954-1) of the machine.
Optionally the KeTop T50-ADP is also availabel with a grey stop button in-
stead of the red-yellow emergency stop button. In principal the grey stop
button has the same functionality as the red-yellow emergency stop button.
If the handheld terminal is not plugged in, the grey color of the stop button
should avoid the usage of the non-effective (emergency) stop button in
dangerous situations.
The grey stop button fulfils also all mechanical aspects of the EN 418 and
differs from the emergency stop button only by its color.
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 uncontrolled
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 op-
eration only.
Test the function of the emergency stop switch when the device had been ex-
posed to mechanical shock (e.g. it had been fallen on the ground)
Note for maintenance:
Additionally the emergency stop switch must be tested cyclic (6 monthly).
Watch the machine stopping after the emergency stop switch had been pushed.