High-response directional valves, direct operated, with electrical position feedback and integrated electronics (OBE) 4WRPE

Description

• Size 6
• Component series 3X
• Maximum operating pressure 350 bar
• Maximum flow 80 l/min
• Nominal flow 8 … 32 l/min
• Digital interface IO-Link for I4.0

Features

• Reliable - proven and robust design
• Energy-efficient - no pilot oil demand, high flows with low pressure differential
• Flexible - suitable for position and velocity control
• Precise - high response sensitivity and little hysteresis
• IO-Link interface, optional

Product description

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 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. The stroke/control spool cross-section is regulated 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).

• Interface "L1":
  • Enable inactive, communication interruption (watchdog)
  • In case of internal IO-Link error

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

Safe shut-off with IO-Link

With symbols E, E1-, W and W1-, the valve can be used as shut-off element in applications of categories 1, 2 or 3 with up to PL d in compliance with EN 13849-1.

Depending on the category or application, additional safety measures must be taken according to EN 13849-1 and operating instructions 29118-B must be observed.

In every safety-relevant application, a safe shut-off of the IO-Link-B voltage (pin 2 and 5) must be ensured according to EN 13849-1.

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.

Damping plate "D"

The damping plate (9) reduces the acceleration amplitudes on the on-board electronics (frequencies >300 Hz).

Notice:

Using 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).

Notice:

With version "V32", the control spool may rotate in case of single-sided flow through the supply flow edges (P–A or P–B) causing damage to or failure of the valve. This can be solved by reducing the pressure differential over the supply flow edge to a maximum of 80 bar or by simultaneously using both control edges (P‒A/B‒T or P‒B/A‒T).

Type code

Technical data

general

hydraulic

Notice:

The specified technical data were measured with HLP46 and ϑOil = 40 ±5 °C.

static / dynamic

electrical, integrated electronics (OBE) – Interface "L1"

(For applications outside these values, please consult us!)

Diagrams/characteristic curves

(measured with HLP46, ϑOil = 40 ±5 °C)

Pressure-signal characteristic curve

Symbol V

Flow/signal function (nominal flow 8 l/min at Δp = 5 bar/control edge)

Symbol E

Flow/signal function (nominal flow 8 l/min at Δp = 5 bar/control edge)

Symbol W

Flow/signal function (nominal flow 8 l/min at Δp = 5 bar/control edge)

Symbol V

Flow/signal function (nominal flow 18 l/min at Δp = 5 bar/control edge)

Symbol E

Flow/signal function (nominal flow 18 l/min at Δp = 5 bar/control edge)

Symbol E1-

Flow/signal function (nominal flow 18 l/min at Δp = 5 bar/control edge)

Symbol W

Flow/signal function (nominal flow 18 l/min at Δp = 5 bar/control edge)

Symbol W1-

Flow/signal function (nominal flow 18 l/min at Δp = 5 bar/control edge)

Symbol V

Flow/signal function (nominal flow 18 l/min at Δp = 5 bar/control edge)

Symbol V1-

Flow/signal function (nominal flow 32 l/min at Δp = 5 bar/control edge)

Symbol E

Flow/signal function (nominal flow 32 l/min at Δp = 5 bar/control edge)

Symbol E1-

Flow/signal function (nominal flow 32 l/min at Δp = 5 bar/control edge)

Symbol W

Flow/signal function (nominal flow 32 l/min at Δp = 5 bar/control edge)

Symbol W1-

Flow/signal function (nominal flow 32 l/min at Δp = 5 bar/control edge)

Symbol V

Flow/signal function (nominal flow 32 l/min at Δp = 5 bar/control edge)

Symbol V1-

Transition function with stepped electric input signals

Symbol V

Frequency response

Symbol V

Flow/load function with maximum valve opening (tolerance ±10 %) (4/3 directional design)

Symbol E

Flow/load function with maximum valve opening (tolerance ±10 %) (4/3 directional design)

Symbol V

Flow/load function with maximum valve opening (tolerance ±10 %) (4/3 directional design)

Symbol W

Notice:

Typical characteristic curves which are subject to tolerance variation.

Symbols/Circuit diagrams

Notices:

• Representation according to ISO 1219-1. Hydraulic interim positions are shown by dashes.

• Only symbols E, E1-, W and W1- are suitable for applications according to EN 13849-1. Further measures must be taken according to EN 13849-1 and operating instructions 29118-B must be observed.

Electrical connection

Block diagram / controller function block

Notes:

• Electrical signals provided via control electronics (e.g. actual value) must not be used for switching off safety-relevant machine functions.

• The factory setting of the potentiometer must not be changed.

Gerätestecker-Belegung „L1“

(M12-5, A-codiert, Class B)

Notices:

• M12 sensor/actuator connection line, 5-pole; M12 connector/bush, A-coded, without shield, maximum cable length 20 m. Observe the voltage drop over the cable. Wire cross-section at least 0.34 mm2.

• Mating connectors, separate order, see "Accessories"

• Communication and parameter description see data sheet 29400-PA

• With a wire cross-section of 0.34 mm2 (standard line), a maximum cable length of 10 m is possible. For a maximum cable length of 20 m, the cross-section must be doubled.

Dimensions

Dimensions in mm

Required surface quality of the valve contact surface

Notice:

The dimensions are nominal dimensions which are subject to tolerances.

Valve mounting screws (separate order)

Notice:

The tightening torque of the hexagon socket head cap screws refers to the maximum operating pressure.

Subplates (separate order) with porting pattern according to ISO 4401-03-02-0-05, see data sheet 45100.

Accessories

Valves with integrated electronics and IO-Link interface

Downloads

Directional control valves, direct operated with electrical position feedback and integrated electronics (OBE) Data Sheet | RE29118 | 2021-07-01 | English | PDF | 1MB Product Groups: High-response directional valves Type 4WRPE