Shielding; General Notes On Shielding - Bosch Rexroth VT-MSPA -2X Series Operating Instructions Manual

16/36 Installation
Bosch Rexroth AG, Valve amplifier VT-MSPA, RE 30232-B/08.2020

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-MSPA..-2X we recommend the use of our shield kit, see Fig. 2
(accessories, see chapter7.2, page 14).As solenoid cables you may use unshielded
cables.
Fig. 2: Shielding of the VT-MSPA...2X

7.5.2 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.