4/3 directional valve

The valve type 4WRPE is a direct operated directional control valve with electric position feedback and integrated electronics (OBE).

Set-up

The valve basically consists of:

Valve housing (1)
Control spool (2) with compression springs (3.1 and 3.2)
Control solenoid with position transducer (4) (optional with electronics protection membrane (8))
Stroke solenoid (7)
On-board electronics (OBE) (5) with analog (6) or IO-Link interface (optionally with damping plate (9))

Function

The integrated electronics (OBE) compares the specified command value to the position actual value. In case of control deviations, the relevant solenoid will be activated. Due to the changed magnetic force, the control spool (2) is adjusted against the corresponding spring. Stroke/control spool cross-section is controlled proportionally to the command value. In case of a command value presetting of 0 V, the electronics adjust the control spool (2) to central position.

Error detection

In the following cases of error, the electronics will de-energize the control solenoids:

Falling below the minimum supply voltage ≤ 15 V (restarting ≥ 17.5 V).
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

The control spool (2) is kept in the mechanical central position by the compression springs (3.1 and 3.2) (does – with symbol V – not correspond to the hydraulic central position).

Damping plate “D”

The damping plate (9) 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 <300 Hz. Electronics protection membrane "-967" To prevent condensate formation in the housing of the integrated electronics (OBE), an electronics protection membrane (8) can be used. Recommended for use outside industry-standard conditions with high ambient air humidity and significant cyclic temperature changes (e.g. outdoors). 4/2 directional valve The valve type 4WRPE is a direct operated directional control valve with electric position feedback and integrated electronics (OBE). Set-up The valve basically consists of: Valve housing (1) Control spool (2) with compression springs (3) Control solenoid with position transducer (4) (optional with electronics protection membrane (8)) On-board electronics (OBE) (5) with analog (6) or IO-Link interface (optionally with damping plate (9)) Function The integrated electronics (OBE) compares the specified command value to the position actual value. In case of control deviations, the control solenoid will be activated. Due to the changed magnetic force, the control spool (2) is adjusted against the control spring. Stroke/control spool cross-section is controlled proportionally to the command value. With a positive command value presetting, the valve opens from P to B or A to T. Negative command values lead to no change in the control spool position. Error detection In the following cases of error, the electronics will de-energize the control solenoid: Falling below the minimum supply voltage ≤ 15 V (restarting ≥ 17.5 V). 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 (9) reduces the acceleration amplitudes on the on-board electronics (frequencies >300 Hz).

Notice: