Shielding; General Notes On Shielding - Bosch REXROTH VT-MRPA1-2X Owner's Manual

16/19 Installation
Bosch Rexroth AG, Valve amplifier VT-MRPA1, RE 30220-B/05.2019

7.5.1 Shielding

Generally, the cables for command values, actual valve values and solenoids have
to be shielded. 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-MRPA1-2X we
recommend the use of our shield kit, see Fig. 2 (accessories, see chapter 7.2, page
14).
Abb. 2: Shielding of the VT-MRPA1-2X

1.1.1 General notes on shielding

▶ Install signal and power cables as far away from each other as possible and do
not install them in parallel.
▶ Do not route signal cables through strong magnetic fields.
▶ Lay signal lines as continuously as possible. If intermediate terminals are
required, the shield must be dealt with separately.
Install power cables consisting of two individual wires (e.g. voltage supply) as
twisted cables.
▶ Cables should only have the number of wires actually required. If this is
impossible, connect the wires with each other and connect them to ground on
one side in the control cabinet.