4/3 directional control valve, pilot operated, with electric position feedback and integrated electronics (OBE)

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1 4/ directional control valve, pilot operated, with electric position feedback and integrated electronics (OBE) RE 977/.1 Replaces: 1.9 1/16 Type 4WRVE 1...7, symbols V, V1 Sizes 1, 16, 5, 7 Component series Maximum operating pressure P, A, B 5 bar (size 7: 8 bar) Rated flow l/min ( p = 1 bar) Type 4WRVE 1 Table of contents Contents Page Features 1 Ordering code Function, section Symbols 4 Test and service devices 4 Technical data 5 and 6 Electrical connection 7 Technical notes for the cable 7 Integrated electronics 8 Characteristic curves 9 to 11 Unit dimensions 1 to 14 Features Pilot operated high-response 4/ directional control valve size 1 to size 7, with control spool and bushing in servo quality Integrated electronics (OBE) with position controller for pilot control and main stage, calibrated in the factory Main stage in servo quality with position feedback Flow characteristics M = progressive with fine control edge P = inflected characteristic curve L = linear Electric port 11P+PE Differential amplifier signal input with interface B5 ±1 V Information on available spare parts:

2 /16 Bosch Rexroth A Hydraulics 4WRVE RE 977/.1 Ordering code 4WRV E 4 K B5 M * with integrated electronics = E Size = 1 1) Control spool symbols 4/ directional design a A B b = 16 1) = 5 1) = 7 1) = V, V1 For V1: P A: q v B T: q v / P B: q v / A T: q v Rated flow at 1 bar valve pressure differential (5 bar/control edge) Size 1 4 l/min ) = 4 55 l/min ) = 55 7 l/min ) = 7 85 l/min ) = 85 Size 16 9 l/min ) = 9 1 l/min ) = 1 15 l/min ) = 15 l/min ) = Size 5 l/min ) = 7 l/min ) = 7 Size 7 4 l/min 1) ) = 4 Further details in the plain text Seal material M = NBR seals suitable for mineral oils (HL, HLP) according to DIN 5154 Interface of the control electronics B5 = Command value input ±1 V Electrical connection K = without mating connector, with unit connector according to DIN 456-AM6 Mating connector separate order Pilot oil supply "x, pilot oil return "y No code = "x = external, "y = external E = "x = internal, "y = external ET = "x = internal, "y = internal T = "x = external, "y = internal Supply voltage of the electronics 4 = +4 V direct current = Component series to 9 (unchanged installation and connection dimensions) Flow characteristics M = Progressive with linear fine control (up to %) P = Inflected characteristic curve, linear (inflection at 4 %) L = Linear 1) Size 7 is the high-flow version of size 5, the connection bores P, A, B, T are designed with Ø mm in the main stage. In the manifold, ports P, A, B, T can be drilled with max. Ø mm in deviation from standard ISO Thus, the valves allow for higher flow values Q A : Q B ) Q N : Flow characteristics "P" ) Q N : Flow characteristics "M" or "L"

3 RE 977/.1 4WRVE Hydraulics Bosch Rexroth A /16 Function, section Structure The valve consists of main assemblies: Pilot control valve (1) with control spool and bushing, return springs, double stroke solenoid and inductive position transducer Main stage () with centering springs and position feedback Integrated control electronics () 1 T A P B Y Functional description In the integrated electronics, the specified command value is compared with the actual position value of the main stage control spool. In case of control deviations, the double stroke solenoid is activated which adjusts the pilot control spool due to the changed magnetic force. The flow released through the control cross-sections causes the displacement of the main control spool, the stroke/control cross-section of which is controlled proportionally to the command value. If the command value is V, the electronic controls the control spool of the main stage in the center position. The pilot control valve is supplied with the pilot oil either internally through port P or externally through port. The return to the tank can be implemented internally via port T or externally via port Y. If deactivated or in case of no release, the pilot control valve is undefined in P-B/A-T (preferred) or P-A/B-T, the main stage can be completely controlled.

4 4/16 Bosch Rexroth A Hydraulics 4WRVE RE 977/.1 Symbols A B a b Type A B Symbol, detailed (pilot oil supply and pilot oil drain external) a Type E... A B Y b P A a A B B b Y T 1 a Type ET... Y b P a AB b T a A B b 1 Main valve Pilot control valve Type T... A B a b Test and service devices Type VT-VETSY-1 service case with test device, see RE 9685 Measuring adapter 11P+PE type VT-PA-1, see RE 67

5 RE 977/.1 4WRVE Hydraulics Bosch Rexroth A 5/16 Technical data general Type Spool valve, pilot operated Actuation Directional control valve size 6 - OBE, with position controller for pilot control valve and main stage Type of connection Subplate mounting, porting pattern according to ISO Installation position Any Ambient temperature range C...+5 Weight kg Size 1 8. Size Size Size Vibration resistance, test condition Max. 5 g, room vibration test in all directions (4 h) hydraulic (measured with HLP 46, ϑ oil = 4 C ±5 C) Hydraulic fluid Hydraulic oil according to DIN , other media upon request Viscosity range recommended mm /s...1 max admissible mm /s Hydraulic fluid temperature range C Maximum admissible degree of contamination of the hydraulic fluid cleanliness class according to ISO 446 (c) Class 18/16/1 1) Flow direction According to symbol Rated flow at Size 1 Size 16 Size 5 Size 7 Δp = 5 bar per edge ) l/min Max. operating pressure Ports P, A, B external pilot oil supply bar Ports P, A, B internal pilot oil supply bar 5 Ports T,, Y bar 5 Min. pilot oil pressure "pilot control stage" bar 1 Q max l/min Q N pilot control valve l/min Zero flow pilot control valve at 1 bar cm /min < 18 < < 5 < 5 Zero flow main stage at 1 bar cm /min < 4 < 6 < 1 < 1 < 1 static / dynamic Hysteresis % <.1 hardly measurable Manufacturing toleranceq max % < 1 Actuating time for signal step...1 % 1 15 (at = 1 bar)...1 % Actuating time for signal step...1 % (at = 1 bar)...1 % Switch-off behavior after electrical shut-off: Pilot control valve not defined in P-B/A-T or P- A/B-T, main stage can be completely controlled (PB/AT or PA/BT) Temperature drift Zero shift < 1% at T = 4 C Zero compensation ex factory ±1 % 1) The cleanliness classes specified for the components must be complied with in hydraulic systems. Effective filtration prevents faults and at the same time increases the service life of the components. For the selection of the filters, see technical data sheets RE 57, RE 576 and RE 581. ) Flow with different p Q x = Q nom Δp x 5

6 6/16 Bosch Rexroth A Hydraulics 4WRVE RE 977/.1 Technical data electric, control electronics integrated in the valve Relative duty cycle % 1 ED, max. power consumption VA (4 V=) Protection class IP 65 according to DIN 45 Port Plug-in connector, 11P+PE Data Supply 4 V= nom 1) Input signal 4) ±1 V Actual value signal (LVDT) ) 1 ) V= nom, fuse protection.5 A F (output stages) V power ground +4 V= nom Signal part V Signal ground U IN U IN }Differential amplifier, R i = 1 kω ±1 V=, R a = 1 kω V, reference point Release input > 8.5 V to 4 V= nom (max. 4 V=) R i = 1 kω Messages 5) 8 Protective earthing conductor Electromagnetic compatibility tested according to 11 Acknowledgement release +4 V= Error message: no error +4 V= Connect only if 4 V = system transformer does not comply with standard VDE 551 EN 61-6-: 5-8 EN 61-6-: 7-1 1) 4 V= nom min. 1 V= max. 4 V= ) U B (pin 1) = output stage supply valve "OFF < 1.4 V= valve "ON" > 16.8 V= no error message (pin 11) ) U S (pin 9) = electronics supply valve "OFF < 16.8 V= error message (pin 11) valve "ON > 19.5 V= no error message (pin 11) 4) inputs: voltage resistant up to max. 5 V 5) Messages are loadable with max. ma and short-circuit proof against ground 11P+PE + PE Note Pilot operated 4/ directional control valves fulfill their function only in active closed control loops and do not have a secured basic position when deactivated. Therefore, "additional isolator valves" are required in many applications and must be taken into account for the On/Off series.

7 RE 977/.1 4WRVE Hydraulics Bosch Rexroth A 7/16 Electrical connection Electric data, see page APBT 4 V = Control Provided by the customer Mating connector 4 Valve 5 Contact surface 6 Provided by Rexroth Technical notes for the cable Version: Multi-wire cable Note Litz wire structure, very fine wires according to VDE 95, class 6 Electric signals taken out via control electronics (e.g. actual value) must not be used for the deactivation of safetyrelevant machine functions! Protective earthing conductor, green-yellow (See also the European standard "Safety requirements for Cu shield braid fluid power systems and their components - Hydraulics", Type: e. g. Oilflex-FD 855 CP EN 98!) (company Lappkabel) Number of wires: Depends on the valve type, connector type and signal assignment Line Ø:.75 mm up to a length of m 1. mm up to a length of 4 m Outer Ø: mm Pg mm Pg16

8 8/16 Bosch Rexroth A Hydraulics 4WRVE RE 977/.1 Integrated electronics Block diagram/pinout version B5: U E ±1 V.5 AF +4 V = V Output stage supply Logic +15 V 15 V DC DC +U B 1 k 1 k 1 k V U IN 1 V V U IN V 1 V V... 1 V 4 V +4 V =,5 A V Enable or LVDT signal (test) Release acknowledgement Electronic supply 1 15 V = ref. +15 V = 4 signal V PD + PID +U B +U B 4 V Error message Protective earthing conductor Input signal Valve position U s HRV U 4 U 5 > V U 4 U 5 = V AB PT AB PT U s 4/ directional control valve U 4 U 5 < V AB PT Pin assignment 11P+PE version B5: U E ±1 V (R i = 1 kω) Test U B U E 4 V = Logic U S 4 V = Logic Protective earthing conductor +4 V = V 4 V = 1 V (Signal) V (Signal) +4 V = V SL 1 k +4 V = V 1 V V +4 V = V Valve Release input Differential amplifier LVDT signal Internal Message Message

9 RE 977/.1 4WRVE Hydraulics Bosch Rexroth A 9/16 Characteristic curves (measured with HLP 46, Oil = 4 C ±5 C) Flow signal function Q = f (U E ) Flow characteristics M Flow characteristics P Q (%) P-A B-T (1:1) B-T (:1) U D E (V) Q (%) 1 % Q N Q (%) 1 P-A 8 B-T (1:1) 6 4 B-T (:1) - 1 % Q N U D E (V) Q (%) Flow characteristics L Q (%) P-A B-T (1:1) B-T (:1) U D E (V) Q (%)

10 1/16 Bosch Rexroth A Hydraulics 4WRVE RE 977/.1 Characteristic curves (measured with HLP 46, Oil = 4 C ±5 C) Pressure gain Δ = f (U E ) D p A B p P D p A-B (% ) 1 8 A B 6 4 a Y b U E U E (%) U E (%) p P D p A-B (% p P ) Step function 1 % Size 1 Size 16 Size 5/ (%) U soll, ist 75 5 p V = 5 bar p V = 1 bar (%) U soll, ist 75 5 p V = 5 bar p V = 1 bar (%) U soll, ist 75 5 p V = 5 bar p V = 1 bar ms 1 ms 1 ms

11 RE 977/.1 4WRVE Hydraulics Bosch Rexroth A 11/16 Characteristic curves (measured with HLP 46, Oil = 4 C ±5 C) Bode diagram Size 1 A B db p syst. = 1 bar db 18 1 % 5 % 1 % 4 Hz 79 Hz 1 Hz Freq % =1 ms f (Hz) 1 % 1 % 5 % 5 % 1 % 1 % Size 16 A B db % 5 % 1 % db 4 Hz Freq. 8 Hz 1 Hz 9 1 % 15 ms p syst. = 1 bar 1 % 1 % f (Hz) 5 % 5 % 1 % 1 % Size 5/7 A B db % 5 % p syst. = 1 bar db 18 1 % 5 Hz Freq % 5 Hz 14 1 % 6 Hz % 6 ms f (Hz) 1 % 5 % 1 % 1 % Amplitude Phase

12 1/16 Bosch Rexroth A Hydraulics 4WRVE RE 977/.1 Unit dimensions size 1 (dimensions in mm) ø6, T APB T Y ,1/1 1 F1 P F Rzmax 4 7 T A B T1 Y Required surface quality of the valve mounting face F4 F 1 Pilot control valve O-ring 9.5x1.78 (ports P, A, B, T) Integrated electronics 4 Main valve 5 Inductive position transducer (main valve) 6 Name plate 7 O-ring 1x (ports P, A, B, T, T1) 8 O-ring 1x (ports, Y) 9 Mating connector not included in the scope of delivery, see technical data sheet RE 88 (separate order) 1 Machined valve mounting face, porting pattern according to ISO Deviating from the standard: ports P, A, B, T, T1 Ø 1.5 mm Subplates, see technical data sheet RE 4555 (separate order) Valve mounting screws (separate order) The following valve mounting screws are recommended: 4 hexagon socket head cap screws ISO 476-M6x4-1.9-N67F817 (galvanized according to Bosch standard N67F81 7) tightening torque M A = 11+ Nm Mat. no

13 RE 977/.1 4WRVE Hydraulics Bosch Rexroth A 1/16 Unit dimensions size 16 (dimensions in mm) A B Y ø ,1/1 Rzmax 4 1 F1 F5 1 F Required surface quality of the valve mounting face T P 96 F4 A 1 Pilot control valve O-ring 9.5x1.78 (ports P, A, B, T) Integrated electronics 4 Main valve 5 Inductive position transducer (main valve) 6 Name plate 7 O-ring x.5 (ports P, A, B, T) 8 O-ring 9x (ports, Y) 9 Mating connector not included in the scope of delivery, see technical data sheet RE 88 (separate order) B F6 Y F 1 Machined valve mounting face, porting pattern according to ISO Deviating from the standard: ports P, A, B, T Ø mm Subplates, see technical data sheet RE 4557 (separate order) Valve mounting screws (separate order) The following valve mounting screws are recommended: hexagon socket head cap screws ISO 476-M6x N67F817 (galvanized according to Bosch standard N67F81 7) tightening torque M A = 11+ Nm Mat. no hexagon socket head cap screws ISO 476-M6x4-1.9-N67F817 (galvanized according to Bosch standard N67F81 7) tightening torque M A = 5+1 Nm Mat. no

14 14/16 Bosch Rexroth A Hydraulics 4WRVE RE 977/.1 Unit dimensions size 5/7 (dimensions in mm) A B ø1 8 6ø F1 F5 1 F,1/1 Rzmax T P Y Required surface quality of the valve mounting face A B F4 F6 F 1 Pilot control valve O-ring 9.5x1.78 (ports P, A, B, T) Integrated electronics 4 Main valve 5 Inductive position transducer (main valve) 6 Name plate 7 O-ring (ports P, A, B, T) Size 5: 8x Size 7: 4.6x.6 8 O-ring 15x.5 (ports, Y) 9 Mating connector not included in the scope of delivery, see technical data sheet RE 88 (separate order) 1 Machined valve mounting face, porting pattern according to ISO Deviating from the standard: size 5: Ports P, A, B, T Ø 5 mm size 7: Ports P, A, B, T Ø mm Subplates, see technical data sheet RE 4559 (separate order) Valve mounting screws (separate order) The following valve mounting screws are recommended: 6 hexagon socket head cap screws ISO 476-M1x6-1.9-N67F817 (galvanized according to Bosch standard N67F81 7) tightening torque size 5 M A = 9+ Nm, size 7 M A = 9±15 Nm Mat. no

15 RE 977/.1 4WRVE Hydraulics Bosch Rexroth A 15/16 Notes

16 16/16 Bosch Rexroth A Hydraulics 4WRVE RE 977/.1 Notes Bosch Rexroth A Hydraulics Zum Eisengießer Lohr am Main, ermany Phone +49 () 9 5 / 18- Fax +49 () 9 5 / documentation@boschrexroth.de This document, as well as the data, specifications and other information set forth in it, are the exclusive property of Bosch Rexroth A. It may not be reproduced or given to third parties without its consent. The data specified above only serve to describe the product. No statements concerning a certain condition or suitability for a certain application can be derived from our information. The information given does not release the user from the obligation of own judgment and verification. It must be remembered that our products are subject to a natural process of wear and aging.

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