Safety instructions 11/48
RE 29391-B/05.2021; 4WRPD(H), 4WRPQ(H), 4WRPF(H), 4WRLD, 4WRLF, 4WRLQ, 5WRPF10, 5WRPQ10, Bosch Rexroth AG
2.6 Product-specific safety instructions
WARNING
Non-compliance with functional safety!
Valves control movements in machines or systems. In the case of mechanical and
electrical faults, e.g. failure of the power supply, persons may get caught, hurled
or crushed by the installation.
When setting up your circuit, observe functional safety, e.g. according to EN
ISO 13849.
Hazardous movements!
It is not allowed for persons to stay within the range of motion of machines
and machine parts. The following are examples of possible measures against
unintended access of persons:
• Protective fences
• Protective grids
• Protective covers
• Light barriers
If persons have to enter the hazard zone while the control is active, provide
superordinate monitoring functions on the system side or measures for
personal safety. These measures must be provided according to the specific
data of the system and on the basis of the risk and error analysis of the system
manufacturer/user. In this connection, the safety provisions applied for the
system must be taken into account.
In case of faults impairing the safety and changes in the operating behavior,
shut down the valve immediately and report the faults to the responsible
personnel.
System parts under pressure and ejecting hydraulic fluid!
When working at hydraulic systems with stored pressure energy (accumulator
or cylinders working under gravity), valves may even be pressurized after the
pressure supply has been switched off. During installation and demounting, the
valves or parts may be hurled around and cause personal injuries and/or damage
to property. There is moreover the risk of serious injury caused by a powerful,
ejecting hydraulic fluid jet.
Before working on the valve, ensure that the hydraulic system is depressurized
and the electrical control is de-energized.
Completely depressurize machines and systems before working on hydraulic
products.
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