Bosch Rexroth VT-HNC100 3X/S Series Operating Instructions Manual page 8

8/24 Bosch Rexroth AG
General safety instructions
During assembly
• Make sure the relevant system component is depressurized and de-energized
before assembling the product or when connecting and disconnecting plugs.
Protect the system component against being switched on.
• The VT-HNC100...3X/S... should not be installed next to power electronics (e.g.
frequency converters). The power pack of the VT-HNC100...3X/S... should be
installed as close to the VT-HNC100...3X/S... as possible.
• Keep connections for the voltage supply as short as possible. Pass supply and
return lines (+24 V/GND) together. Voltage 18-30V.
Residual ripple < 1.5 V , I = 1 A - 4 A (depending on the VT-HNC100...3X/S...
pp
version and the co-supplied components).
Ensure the largest spatial separation of signal and load lines possible and do
not pass them parallely. Do not lead signal lines through strong magnetic fields.
If possible, pass signal lines without interruption. If intermediate terminals are
necessary, use a terminal block with shield bus and an assembled
VT-HNC100...3X/S... cable (max. length 2 m).
Exception VT-HNC100-C-3X/S...: Here, intermediate clamping using a corre-
sponding terminal block/shield bus 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.
• For signal lines, only cables with a copper braid screen should be used. The
cable screen is extensively connected with the metallized connector housing
and usually only on the VT-HNC100...3X/S... side. This is achieved by pushing
the screen back and clamping under the pull relief.
Cables should only have the actually required number of wires. If this is not
possible, the remaining wires should be laid to GND on both sides.
• Voltage supply of external components:
A digital position transducer with 24 V or 5 V supply can be additionally supplied
via the encoder interface. When supplying a 24 V encoder, the input voltage of
the VT-HNC100...3X/S... 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 socket X2A,
X2A1. The input voltage of the VT-HNC100...3X/S... must comply with the
requirements of the pressure cell.
For more information on currents etc. please refer to the technical data sheet
RE 30159.
• By snapping the housing of the VT-HNC100...3X/S... on a conductive assembly
rail, the earth connection to the control cabinet back wall is established. This
constitutes the HF earthing of the VT-HNC100...3X/S....
• Lay the cables and lines so that they cannot be damaged and no one can trip
over them.
• Before commissioning, make sure that all the seals and plugs of the plug-in
connections are installed correctly and intact to ensure that they are leakproof
and fluids and foreign bodies are prevented from penetrating the product.
• The environment must be free from electrically conductive contamination (acids,
bases, corrosive agents, salts, metal vapors, etc.) and must not be exposed
these substances.
• No silicone-containing sealing, adhesive or insulating agents must be used.
• Ensure a maintenance-friendly installation, i.e. simple access to the connection
lines. Free access to the connection side must be guaranteed.
• Before installation note down the information on the nameplates.
If after the installation, nameplates are not visible or readable any more, this
data will be quickly available to you at any time.
• Do not use electrical signals led out of the VT-HNC100...3X/S... (e.g. the Ready
for Operation signal) for switching safety-relevant machine functions! (in this
connection also see the European Standard "Safety requirements for fluid
power systems and their components - Hydraulics" EN 982:1996).
VT-HNC100...3X/S... | RE 30159-B/12.14