Bosch Rexroth 4WRPEH6 3X Operating Instructions Manual page 31

General information
for wiring
Troubleshooting
the system
RE 29118-B/09.2021; 4WRPEH6_3X, 4WRPEH10_3X, 4WRPE6_3X, 4WRPE10_3X, 4WRLE_4X; Bosch Rexroth AG
▶ Do not pass the signal lines through strong magnetic fields.
▶ Lay signal lines as continuously as possible. If intermediate terminals are
required, use a terminal block with shield strip. Load lines consisting of two
individual wires (e.g. voltage supply) must be laid in parallel or twisted.
▶ Cables should have the actually required number of wires only. If this is not
possible, the unused wires have to be connected with each other and then to the
ground on one side in the control cabinet.
In case of faulty IO-Link interface signals, please refer to 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 ground.
• Frequency converter
– Inlet 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
7.7.4 Altitude of the valve with IO-Link interface
For safety-relevant applications, the intended altitude of the valve is limited to
2000 m. Higher altitudes are not admissible.
Assembly 31/44