Directional control valve, pilot-operated, with integrated fieldbus (IFB-Multi Ethernet) 4WRLF

Description

• Size 10 … 27
• Component series 4X
• Maximum operating pressure 350 bar
• Maximum flow 1850 l/min
• Nominal flow 60 … 600 l/min

Features

• Open
  - Integrated fieldbus (IFB Multi-Ethernet)
  - Bus connection/service interface (Sercos, EtherCAT, EtherNet/IP, PROFINET RT, POWERLINK, VARAN)
• Scalable
  - 2 configurable analog pressure sensor inputs
• Precise
  - Integrated pressure-force control
  - High response sensitivity and little hysteresis
• Safe
  - Internal safety function (can be used up to category 4/PL e according to EN13849-1)
  - CE conformity according to EMC Directive 2014/30/EU

Product description

General information

The pilot-operated IFB Multi-Ethernet valve (Integrated Fieldbbus) is a digital directional control valve with integrated fieldbus:

• The following operating modes are possible:

• Standard:
  • Valve direct control
  • Flow control

• Version "5" (with external pressure sensors):
  • Pressure/force control
  • Active damping
  • Substitutional control (flow - pressure/force); pQ function (flow-controlled)

• Command value presetting is done via the Ethernet interface (X7E1 or X7E2)

• The feedback information of the actual value signals to the superior control system is provided via the Ethernet interface (X7E1 or X7E2)

• The controller parameters are set via the Ethernet interface (X7E1 or X7E2)

Set-up

The directional control valve with IFB Multi-Ethernet electronics mainly consists of:

• Pilot control valve (1) with control spool and sleeve in servo quality

• Main stage (2) with centering springs and position feedback

• Integrated fieldbus (3) with:
  • connector, voltage supply, safety shut-down (XH1)
  • Ethernet interfaces (X7E1, X7E2)
  • analog sensor interfaces (X2N)
  • interface for the position transducer of the main stage (X8A)

Function (symbol V, V1- and Q3-)

When the control solenoid of the pilot control valve is de-energized, its spring-operated control spool is in the "fail safe" position. The control spool of the main valve is in the spring-centered offset position at approx. 6% of the stroke in direction P→B/A→T.

The integrated electronics (OBE) compare the specified command value to the position actual value of the control spool of the main stage. In case of a control deviation, the control solenoid of the pilot control valve is activated and its control spool is adjusted.

The flow which is activated via the control cross-sections at the pilot control valve leads to an adjustment of the control spool of the main valve. The stroke/control cross-section of the main valve is regulated proportionally to the command value. In case of a command value presetting of 0%, the electronics adjust the control spool of the main valve to central position.

The pilot oil supply in the pilot control valve is either internal via port P or external via port X. The feedback can be internal via port T or external via port Y to the tank.

Switching off the release (symbol V and V1-)

The control spool of the main valve is not in a safe position after the release is switched off. The enable acknowledgement is not set (pin C). If the supply voltage fails or in case of cable break, the integrated electronics will de-energize the control solenoid, the pilot control spool will move to the fail-safe position and will unload the pilot oil chambers of the main valve. Operated by the spring, the control spool of the main valve will move to the offset position (approx. 6% P→B/A→T).

Function (symbol E. and W.)

When the control solenoid of the pilot control valve is de-energized, its spring-operated control spool is in the "fail safe" position. The control spool of the main valve is in spring-centered central position.

The integrated electronics (OBE) compare the specified command value to the position actual value of the control spool of the main stage. In case of a control deviation, the control solenoid of the pilot control valve is activated and its control spool is adjusted.

The flow which is activated via the control cross-sections at the pilot control valve leads to an adjustment of the control spool of the main valve. The stroke/control cross-section of the main valve is regulated proportionally to the command value.

The pilot oil supply in the pilot control valve is either internal via port P or external via port X. The feedback can be internal via port T or external via port Y to the tank.

Switching off the release (symbol E., W. and Q3-)

If the control spool of the main valve is in the safe position, the enable acknowledgement is set (pin C).

If the control spool of the main valve leaves the safe position or the release is set, the enable acknowledgement expires. If the supply voltage fails or in case of cable break, the integrated electronics will de-energize the control solenoid, the pilot control spool will move to the fail-safe position and will unload the pilot oil chambers of the main valve. Operated by the spring, the control spool

of the main valve will move to the central position.

Monitoring

The digital control electronics enable comprehensive monitoring functions/error detection including:

• Undervoltage

• Communication error

• Cable break for analog sensor inputs

• Monitoring of the microcontroller (watchdog)

• Temperature of the integrated electronics

IndraWorks DS PC program

To implement the project planning task and to parameterize the valves, the user may use the IndraWorks DS engineering tool (see accessories):

• Project planning

• Parameterization

• Commissioning

• Diagnosis

• Comfortable administration of all data on a PC

• PC operating systems: Windows 7-10

Notice:

• Symbol V and V1-:
  • Pilot-operated 4/3 directional control valves are only functional in the active control loop and do not have a locking basic position when deactivated. Consequently "external isolator valves" are required in many applications and must be taken into account regarding the switch-on/switch-off order.
  • While the electrical supply voltage is being switched off, the drive may be accelerated for a short time in functional direction P → B.

• Symbol E. and W.:
  • Pilot-operated 4/3 directional control valves with positive overlap are functional in controlled or regulated axes. The overlap in the de-energized state is approx. 20% of the control spool stroke.
  • While the release is being switched off, the drive may be accelerated for a short time in functional direction P → B (see operating instructions 29391-B).

Pilot oil supply (schematic illustration)

Size 10

Size 16

Size 25

Size 27

Version “XY"

External pilot oil supply, external pilot oil return

In this version, the pilot oil is supplied from a separate control circuit (external). The pilot oil return is not directed into channel T of the main valve, but is separately directed to the tank via port Y (external).

Version “PY”

Internal pilot oil supply, external pilot oil return

With this version, the pilot oil is supplied from channel P of the main valve (internally). The pilot oil return is not directed into channel T of the main valve, but is separately directed to the tank via port Y (external). In the subplate, port X is to be closed.

Version “PT”

Internal pilot oil supply; internal pilot oil return

With this version, the pilot oil is supplied from channel P of the main valve (internally). The pilot oil is directly returned to channel T of the main valve (internally). In the subplate, ports X and Y are to be closed.

Version “XT”

External pilot oil supply, internal pilot oil return

In this version, the pilot oil is supplied from a separate control circuit (external). The pilot oil is directly returned to channel T of the main valve (internally). In the subplate, port Y is to be closed.

Type code

Technical data

general

hydraulic

static / dynamic

electrical, integrated electronics (OBE)

electrical, integrated electronics (OBE)

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

Diagrams/characteristic curves

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

Pressure amplification

Flow characteristic "L"

Flow/signal function

Symbol V, V1-

Flow/signal function

Symbol E, E1-, W6-, W8-

Flow characteristic "P"

Flow/signal function

Symbol V, V1-

Flow/signal function

Symbol E, E1-, W6-, W8-

Flow characteristic "M"

Symbol Q3, version "100"

Symbol Q3, version "250"

Symbol Q3, version "400"

Symbol Q3, version "600"

Size 10

Transition function with stepped electric input signals

Symbols V and Q3-

• Pilot control valve, port X = 100 bar

• Main valve, port P = 10 bar

Frequency response

Symbols V and Q3-

Flow/load function with maximum valve opening (tolerance ±10 %)

Size 16

Transition function with stepped electric input signals

Symbol V

• Pilot control valve, port X = 100 bar

• Main valve, port P = 10 bar

Frequency response

Symbol V

Flow/load function with maximum valve opening (tolerance ±10 %)

Size 25

Transition function with stepped electric input signals

Symbol V

• Pilot control valve, port X = 100 bar

• Main valve, port P = 10 bar

Frequency response

Symbol V

Flow/load function with maximum valve opening (tolerance ±10 %)

Size 27

Transition function with stepped electric input signals

Symbol V

• Pilot control valve, port X = 100 bar

• Main valve, port P = 10 bar

Frequency response

Symbol V

Flow/load function with maximum valve opening (tolerance ±10 %)

Symbols/Circuit diagrams

Version	simple	Detailed
"XY"
"PY"
"PT"
"XT"

Notices:

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

• For information on the switch-off behavior, refer to "technical data".

• Symbols V and V1- are not suitable for use in safety applications (no overlap).

Electrical connection

Block diagram / controller function block

Detailed description of the safety function:

After the signal at the enable input has been removed, the output stage, and thus the solenoid of the valve, are internally separated from the available supply voltage. The enable acknowledgment will only be activated after the safe valve spool position has been achieved.

Connector pin assignment XH1, 6-pole + PE according to DIN 43563

Connector pin assignment: M12 x 1, 4-pole, coding D, socket (for Ethernet interfaces "X7E1" and "X7E2")

Analog configurable sensor interfaces, connection "X2N" (coding A), M12, 5-pole, socket

Notices:

• Reference potential for all signals : GND

• We recommend connecting the shields on both sides via the metal housings of the plug-in connectors.

LED displays

Displays of the Status LEDs

Notices:

• For the connection to the M12 sockets, we recommend using self-locking mating connectors.

• Module status LED MS relates to the electronics module.

• The network status LED NS indicates the status of the control communication, see application description 30338-FK.

• LEDs L1, S1, L2 and S2 relate to interfaces "X7E1" and "X7E2"

• For a detailed description of the diagnosis LEDs, please refer to the functional description "Rexroth HydraulicDrive HDx".

• Function is only available after start-up of the electronics.

Dimensions

Size 10

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.

Size 16

Dimensions in mm

Required surface quality of the valve contact surface

Notice:

The dimensions are nominal dimensions which are subject to tolerances.

Notice:

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

Size 25

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.

Size 27

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, see data sheet 45100.

Project planning information

Project planning and maintenance instructions

• The supply voltage must be permanently connected, as otherwise bus communication is not possible.

• If electro-magnetic interference is to be anticipated, suitable measures must be taken to ensure the function (depending on the application, e.g. shielding, filtration).

• The devices have been tested in the plant and are supplied with default settings.

• Only complete devices can be repaired. Repaired devices are returned with default settings. User-specific settings will not be applied. The machine end-user will have to retransfer the corresponding user parameters.

Accessories

Protective cap M12

Material number R901075563

Mating connectors for valves with round connector, 6-pole + PE

7P Z31

Mating connectors for valves with round connector, 6-pole + PE

7P Z31

• For valves with round connector according to EN 175201-804, 6-pole + PE as well as 6-pole, compatible with VG 95328

• Data sheet

• Spare parts and repair

Mating connectors for valves with round connector, 6-pole + PE, shielded, with assembled connection line

7P Z31 +

Mating connectors for valves with round connector, 6-pole + PE, shielded, with assembled connection line

7P Z31 +

• For valves with round connector according to EN 175201-804, 6-pole + PE as well as 6-pole, compatible with VG 95328

• Data sheet

• Spare parts and repair

Downloads

	Directional control valve, pilot-operated, with integrated fieldbus (IFB-Multi Ethernet) Data Sheet | RE29293 | 2019-06-01 | English | PDF | 1.1MB Product Groups: Pilot-operated Type 4WRLF
	High-response/proportional valves with Multi-Ethernet interface Manual | RE29391-B | 2021-10-04 | English | PDF | 1.6MB Product Groups: Proportional, high-response and servo valves 4WRPD(H), 4WRPQ(H), 4WRPF(H), 4WRLD, 4WRLF, 4WRLQ, 5WRPF10, 5WRPQ10
	Rexroth HydraulicDrive HDS-16, HDx-17 to HDx-20 Parameters Reference Book | RE30330-PA | 2020-04-01 | English | PDF | 12.6MB Product Groups: Axis control Reference Book
	Rexroth HydraulicDrive HDx-20VRS Firmware for drive controllers Release Note | RE30330-RN | 2019-06-06 | English | PDF | 2.9MB Product Groups: Axis control Firmware Release Notes
	Rexroth HydraulicDrive HDx-20VRS Firmware für Antriebsregelgeräte Release Note | RD30330-RN | 2019-06-06 | German | PDF | 3MB Product Groups: Axis control Firmware Release Notes
	Rexroth HydraulicDrive HDS-16, HDx-17 to HDx-20, Diagnostic Messages Manual | RE30330-WA | 2020-04-01 | English | PDF | 4.9MB Product Groups: Axis control Reference
	Rexroth HydraulicDrive HDx-20 Functions Manual | RE30338-FK | 2020-04-01 | English | PDF | 59.1MB Product Groups: Axis control