Download KeTop T100 Handheld Terminal

Handheld Terminal
Connection
Panic
The pushing of the actuating elements into the panic position is evaluated
in a way that the enabling position is skipped when the actuating elements
are released.
Home position
x
enabling
u panic v
home position
1
2
x
ZTx
1 2 3
ZTx2
C ircu it 2
1 2 3
ZTx1
C ircu it 1
Enabling Evaluation
switch electronics
3
u
Circuit 1
OFF
ON
OFF
Circuit 2
OFF
ON
OFF
v
ZTx
Circuit 1
OFF
OFF
OFF
Circuit 2
OFF
OFF
OFF
x ... L (Left) or R (Right)
Contact travel diagram for panic
Notice
• At the KeTop, the enabling switches always feature two circuits.
To meet the safety category 3 in accordance with EN 954-1:1996, the enabling switch must be realized with 2 circuits.
The safety category 3 means, that one failure must not lead to the loss of
the safety function, and whenever possible, the single failure is detected.
The chapters „Example of Connection with PILZ PST1 Control Relay“ and
“Example of Connection with ELAN SRB-NA-R-C.27/S1 Control Relay”
show how the safety category 3 can be fulfilled with the KeTop and its
safety-related parts. The entire concept of the machine must be laid out according to the principles of safety category 3.
The monitoring of the simultaneity by the control relay is necessary, because otherwise maybe a failure culmination would not be recognised and
this would cause the loss of safeness:
If one circuit of the enabling device switches to the enabled state as a result
of a failure and after some time the second circuit also switches to the enabled state as a result of an failure, then no de-energisation by the enabling
device would be possible.
User's Manual, version: 3.1 / material no.: 57448
© KEBA 2006
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