Programming Device And Ground Connection; Dimensioning The Voltage Supply; Main Switches And Fuses; Main Switches - Bosch Rexroth IndraControl L10 Project Planning Manual

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Installation and Maintenance

Programming Device and Ground Connection

Dimensioning the Voltage Supply

8.2.4

Main Switches and Fuses

Main Switches

and Controls
Fig.8-5: Reference conductor not connected to the protective conductor
Programming devices are almost always provided with a connection between
the ground and the functional earth ground. This connection might give rise to
problems, if the voltage supply of the IndraControl L10 is provided with a ground
fault detector and the programming device is connected to the
IIndraControl L10. Owing to the non-isolated power supply unit assembly, the
ground fault in the programming device has an effect on the ground fault de‐
tector via the central processing unit and the power supply unit assembly. 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.
When dimensioning the voltage supply, consider the maximum currents (see
DIN VDE 0100-523). A voltage of 20.4 ... 28.8 V must be applied directly to the
unit.
The voltage must also be maintained if:
● There are variations in the line voltage, for instance caused by differing
loads of the power supply network,
● There are varying load states, such as short-circuit, normal load, lamp
load, or no load.
The maximum line cross-section for the voltage supply is 1,5 mm
A main switch according to DIN VDE 0100 must be provided for the
IndraControl L10 as well as sensors and actuators.
Rexroth IndraControl L10 | Project Planning Manual
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