Proportional Directional Servo Valve 4WRPEH 6-3X

Industrial Applications

• Proportional directional servo valve 4WRPEH 6-3X is widely used in the field of industrial automation,wind turbines, machine tool control, engineering machinery, aerospace, shipbuilding and marine engineering.
• Set-up
• The HD-4WRPEH high-response valve mainly consists of:
• Valve housing with control spool and sleeve in servo quality (1)
• Control solenoid with position transducer (2)
• (optionally with electronics protection membrane (5))
• On-board electronics (OBE) (3) with analog or IO-Link interface (4) (optionally with damping
• plate (6))
• Function
• The integrated electronics (OBE) compares the specified command value to the position actual value. In case of control deviations, the stroke solenoid will be activated. Due to the changed solenoid force, the control spool is adjusted against the spring. Stroke/control spool cross-section is controlled proportionally to the command value. In case of a command value presetting of 0, the electronics adjusts the control spool against the spring to central position. In deactivated condition, the spring is untensioned to a maximum and the valve is in fail-safe position.
• Safety function (IO-Link shut-off)
• By shutting off the supply voltage at the IO-Link master (Class B-Port), pins 2 and 5, the IO-Link valve can be safely switched off. After shut-off of the supply voltage, the control spool of the valve is set to fail-safe position. In order to also guarantee the hydraulic prerequisite for the safety shut-down, the overlap of control spool/sleeve must also be considered.
• Sufficient overlap is guaranteed by the symbols C3, C5, C4 and C1.
• The safe shut-off is not part of the IO-Link valve and must be taken into account for the safe design of the machinery.
• Control solenoid shut-off
• In case of the following errors, the control solenoids are de-energized by the integrated electronics (OBE) and the control spool is set to fail-safe position:
• Falling below the minimum supply voltage
• Only at interface "F1":
• – Falling below the minimum current command value of 2 mA (includes cable break of the command value line (current loop))
• Only at interface "L1":
• – Enable inactive, communication interruption (watchdog)
• – In case of internal IO-Link error
• Only at interface "C6":
• – Additionally, release inactive
• Damping plate "D"
• The damping plate reduces the acceleration amplitudes on the on-board electronics (frequencies >300 Hz).
• Notice:
• Use of the damping plate is not recommended for applications with mainly low-frequency excitation
• Electronics protection membrane "-967"
• To prevent condensate formation in the housing of the integrated electronics (OBE), an electronics protection membrane (5) can be used.
• Recommended for use outside industry-standard conditions with high ambient air humidity and significant cyclic temperature changes (e.g. outdoors).
• Symbols of Proportional Directional Servo Valve 4WRPEH 6-3X