Bosch Rexroth 4WRPEH6 3X Operating Instructions Manual page 30

30/44 Assembly
Voltage supply
Bosch Rexroth AG, 4WRPEH6_3X, 4WRPEH10_3X, 4WRPE6_3X, 4WRPE10_3X, 4WRLE_4X; RE 29118-B/09.2021
Electro-magnetic processes!
Hydraulic valves with electronic components can be disturbed by electro-magnetic
radiation from unshielded connection lines. This can lead to uncontrolled motion at
the system.
▶ Comply with EMC limit values. Only use recommended electrical connection
lines according to the EMC Directive and shield the valve electronics if
necessary.
▶ Ensure sufficient distance between the valve electronics and power-current lines
or frequency converters. If necessary install shielding. Ensure EMC-compliant
wiring.
Missing seals and caps!
Loss of protection class IP65 and risk of short circuit. Liquids and foreign particles
may penetrate and damage the valve.
▶ Before assembly, ensure that all seals and caps of the plug-in connections
are tight.
Plugging or unplugging connectors while energized!
The valve might be destroyed.
▶ Switch off the power supply to the relevant system part before assembling the
valve or when connecting and disconnecting connectors.
▶ Ensure a maintenance-friendly installation, i.e. simple access to the connection
lines. Free access to the connection sides must be guaranteed.
▶ Before installation note down the information on the name plate. If after the
installation, name plates are not visible or readable any more, this data will be
quickly available to you at any time.
As supply voltage of the valve, functional low voltages with electric separation
(PELV or SELV) according to VDE0100, part 410 must be used.
For the external voltage supply, it must be ensured that, even in error cases,
the voltage limitation defined for the valve is not exceeded. PELV power supply units
according to EN 60204, section 6.4.2 comply with these requirements.
▶ Only connect voltages and electric circuits provided with safe isolation from
dangerous voltages. Safe isolation can be achieved with isolation transformers,
safe optocouplers or mains-free battery operation.
When calculating the PFH (probability of dangerous failure per hour) of the safety
function, the PFH of the external voltage supply must also be taken into account.
▶ Keep the connection as short as possible. Please observe the detailed
information on voltage supply in the respective valve data sheet.
CAUTION
NOTICE