Handheld Terminal
CE Conformity, Directives and Standards
User's Manual, Version: 1.3
145
© KEBA 2007
the machine with the machine switched off. This takes place during the in-
stallation or deinstallation process. The handheld terminal’s are not de-
signed to be connected or disconnected whilst the machine is operating.
On many simple machines the handheld terminal is also the only operating
option, so that, without the handheld terminal, the machine cannot be put
into operation at all. Nonetheless, if the connector is unplugged from the
machine during operation the emergency stop circuit is broken and the
emergency stop function of the machine is activated, causing the machine
to stop.
If a handheld terminal is uninstalled from a machine and is not reinstalled
immediately, the equipment must be locked out in order to avoid confusion
with a functioning handheld terminal. The machine can only be put back
into operation again after a new handheld terminal has been installed.
This procedure must be described in the operating instructions for the ma-
chine and is the responsibility of the operator.
Due to the fact that plugging and unplugging takes place only rarely and
that the machine is out of operation when unplugged, the risk of an acci-
dent as the result of a non-operational emergency stop button is considered
to be very low and the use of red/yellow identification is therefore permissi-
ble.
The red/yellow emergency stop button must be connected into the emer-
gency stop circuit of the machine in any case and must cause the power
supply to the machine or set of machines in a plant to be switched off (stop
category 0 or 1 in accordance with EN 60204-1).
14.2.9.2 Radio controlled handheld terminals: Stop button
Wireless handheld terminal’s present a different case. These devices are
not normally assigned to a specific machine but can be frequently logged
on and off whilst the machine is in operation and can also be switched be-
tween different machines. For this reason the stop button is not always op-
erational and the operating status is not clear to everyone.
Therefore, for stop functions in wireless controllers, EN 60204-1:1997
"Safety of Machinery. Electrical Equipment of Machines" (Chapter 9.2.7.3),
demands:
"The operating means to initiate this stop function shall not be
marked or labelled as an emergency stop device, even though the
stop function initiated on the machine can be an emergency stop
function."
For this reason, for radio controlled handheld terminal’s KEBA uses a stop
button that features all the mechanical characteristics of a normal emer-
gency stop button but is of a neutral grey colour.