RE 30232-01-B, Edition 04.2020, Bosch Rexroth AG
Installation |
Valve amplifier VT-MSPA2-2X
15 | 36
Should the spring-loaded latch not snap open automatically, it can be released
using a screwdriver (see Fig. 1 on the right). After having positioned the latch, let
it spring back into the engaged position.
Observe the following when connecting the VT-MSPA2-2X:
▶ For mounting, observe the notes on applicable standards and operating
conditions in data sheet RE 30232-01.
▶ Do not use connectors with free-wheeling diodes or LED lamps for connecting
solenoid cables to the valve!
▶ Use low-capacitance cables.
▶ Whenever possible, execute cable connections without intermediate terminals.
▶ Install sensor cables separately.
▶ When sources of electromagnetic disturbance are used (e.g. frequency
converter), malfunction may occur. Avoid the installation of the VT-MSPA2-2X in
the direct vicinity to sources of disturbance.
▶ The distance to aerial lines, radio sources and radar equipment must be at
least 1 m.
▶ Do not lay signal cables near power cables.
▶ The system ground is an essential, integral part of EMC protection of the
VT-MSPA2-2X. Here, interference, which is transported to the VT-MSPA2-2X
via data and voltage supply cables, is dissipated. This function can only be
ensured, if the system ground itself does not inject interference into the control
electronics.
7.5
CONNECTING THE SUPPLY VOLTAGE
1.
Disconnect the relevant system part from the power supply.
2.
Inspect all cables for intactness.
3.
Connect the signal and solenoid cables according to your circuit diagram to the
relevant terminals of the VT-MSPA2-2X.
4.
Connect the supply voltage and check the presence of voltage by switching on.
7.5.1 Shielding
For digital inputs and outputs as well as for the command value and the actual
value the permissible cable length of unshielded cables is 30 m. In the case of
greater lengths use shielded cables with a copper braid shield. Connect the cable
shield on both ends and on a large area to the system ground. For connection of
the cable shield to the VT-MSPA2-2X we recommend the use of our shield kit, see
Fig. 2 (accessories, see chapter 7.2, page 14). As solenoid cables you may use
unshielded cables.
