Handheld Terminal
Connection
User's Manual, Version: 1.3
23
© KEBA 2007
4.3 Power Supply
!
WARNING!
•
All supply circuits connected to KeTop must be protected with a fuse
of a maximum of 3.15 A.
Notice
•
When planning the power supply, take into account the voltage drop on
the KeTop TTxxx connection cable:
Specification of power supply lines in the KeTop TTxxx connection ca-
ble:
Cross section:
AWG24 (0.24mm²)
Material: zinc-coated
copper
strand
Line resistance:
≤
90 Ohm/km (
≤
145 Ohm/mile)
•
The nominal supply voltage directly on the handheld terminal (without
KeTop TTxxx connection cable) is:
+24 VDC (fully operational in the range: 19,2-30 VDC).
•
Power consumption:
9.6 W (400 mA at 24 V DC)
•
Maximum interruption time of supply voltage:
≤
10 ms (lt. IEC 61131)
4.4 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 ISO 13850. 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 posi-
tive-break contacts to an appropriate monitoring system must meet the
safety category which is defined by means of the risk assessment (in ac-
cordance with EN 954-1) of the machine.
Optionally the KeTop is also availabel with a grey stop button instead 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.