Bosch Rexroth 4WRPEH6 3X Operating Instructions Manual page 12

12/44 Safety instructions
Bosch Rexroth AG, 4WRPEH6_3X, 4WRPEH10_3X, 4WRPE6_3X, 4WRPE10_3X, 4WRLE_4X; RE 29118-B/09.2021
Incorrect connection!
Risk of injury caused by electric shock!
▶ The valve may only be connected by or under the supervision of a specialized
electrician.
▶ Switch off the voltage supply before all maintenance, repair or installation works
and secure it against restarting.
▶ Provide for proper, safe PE connection.
▶ As supply voltage of the valve with IO-Link interface, 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 a safe isolation from
dangerous voltages. Safe isolation can be achieved with isolation transformers,
safe optocouplers or mains-free battery operation.
Notice:
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.
Incorrect mounting!
Mounting of valves with mounting screws of reduced stability, insufficient mounting
or fastening at blocks and plates with insufficient stability may lead to components
becoming loose and falling down. Consequently, hydraulic fluid may leak and
lead to personal injuries and/or damage to property. Valves with high weight may
cause bruises or fatal injury. Particular caution applies to valves with suspended
installation.
▶ Completely assemble the valve according to the assembly specifications by
means of suitable assembly aids.
▶ Only assemble the valve at blocks or plates suitable for the weight of the valve.
▶ Comply with tightening torques and screw stabilities.
Missing equipotential bonding!
Electrostatic processes, an incorrect grounding concept or missing equipotential
bonding may lead to malfunctions or uncontrolled movements at the machine and
thus cause injuries.
▶ Provide for correct grounding and proper equipotential bonding.
WARNING