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Bosch Rexroth AG
VT-HNC100...3X | RE 30139-B/12.14
Assembly
Supply of external components
When supplying a 24 V encoder, the input voltage of the HNC100...3X at X1S
must comply with the encoder's requirements
(e.g. 24 V +/–5 %, residual ripple < 500 mV).
Analog components like pressure cells can be supplied via the sockets X2A1...4.
Prerequisite: The supply of the VT-HNC100...3X corresponds to the requirements
of the pressure cell. Further notes with regard to currents, etc. are available in the
data sheet RE 30139.
6.3.3 Screening
For signal lines, only cables with a copper braid shield should be used. The cable
shield is extensively connected with the metallized connector housing and only
on the VT-HNC100...3X side. This is achieved by pushing the screen back and
clamping under the pull relief.
6.3.4 General notes with regard to wiring
f
Observe the highest possible separation of signal and load lines and do not
lay the same parallel.
f
Do not pass the signal lines through strong magnetic fields.
f
Lay signal lines as continuously as possible. If intermediate terminals are
required, please use terminal block with shield strip and assembled
VT-HNC100...3X cable (max length 2m).
Exception: VT-HNC100-C-3X (Compact): Here, intermediate clamping using a
corresponding terminal block/shield strip is necessary for EMC-compliance.
Load lines of two individual wires (e.g. voltage supply) are to be passed in a
parallel or drilled form.
f
Cables should have the actually required number of wires only. If this is not
possible, you must connect the wires and connect them to the earth on one
side in the control cabinet.
6.3.5 Troubleshooting the system
In case of faults with the VT-HNC100 signals, you must check the troubleshooting
of other electric components, e.g. as follows:
Switched inductivities:
DC: Antiparallel free-wheeling diode over actuator
winding
AC: Type-related R/C combination over actuator
winding.
Electric motors
R/C combination from each motor winding to earth.
Frequency converter
Input filter in the voltage supply of the frequency
converter.
Motor control line shielded and laid separately from
other lines, and/or output filter for motor lines.
Extensive contact of the FU housing with the rear
wall of the control cabinet
