REXROTH IndraControl L25 CML...3N Series, Руководство по планированию проекта

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Programming Device and Grounding
Programming devices are almost always provided with a connection between
the ground and the functional earth ground. This connection might cause prob‐
lems, if the voltage supply of the IndraControl L25 is provided with a ground
fault detector and the programming device is connected to the IndraCon‐
trol L25. Owing to the non-isolated power supply unit device, the ground fault
in the programming device effects the ground fault detector via the central pro‐
cessing unit and the power supply unit device. In this case, the detector should
not deactivate the system automatically, but only indicate the ground fault.
Maintenance staff should be aware of this fact.
Dimensioning the Voltage Supply
When dimensioning the voltage supply, the maximum currents have to be ob‐
served, see DIN VDE 0100-523. A voltage between 20.4 V to 28.8 V must be
applied directly to the device.
The voltage also must be maintained if:
●
There are variations in the line voltage, e.g. caused by different loads of
the power supply network.
● Different load states, e.g. short-circuit, normal load, lamp load, or no load.
The maximum line cross-section for the voltage supply is 1.5 mm
2
.
8.3.4 Main Switches and Fuses
Main Switches
A main switch according to DIN VDE 0100 must be provided for the IndraCon‐
trol L25 as well as for sensors and actuators.
Fuses
Fuses and circuit-breakers protect the supply lines in a network. The lines of
the voltage supply of the IndraControl L25 must be protected. The sensor sup‐
ply and the actuator supply should each be protected by a separate fuse. If the
supply lines are shorter than 3 m and are placed such that they are protected
from ground faults and short-circuits, it is not necessary to provide fuses.
Further criteria for selecting protective devices are:
●
Nominal voltage
● Temperature
● Internal resistances of the fuses
● Inrush currents
● Cable lengths
● External impedance of the power supply system
● Possible fault location
● Vibration
For further information, please refer to Manual No. 32, VDE publications, Di‐
mensioning and protecting lines and cables according to DIN 57 100,
VDE 0100–430 and –523.
Appropriate information is also provided by many manufacturers of fuses and
circuit-breakers.
Bosch Rexroth AG DOK-CONTRL-IC*L25*****-PR03-EN-P
Rexroth IndraControl L25
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Installation and Maintenance