4/2- and 4/3-way proportional directional valves, direct operated, without electrical position feedback Models 4WRA and 4WRAE, Series 2X

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1 /- nd /-wy proptionl directionl vlves, direct operted, without electricl position feedbck Models WR nd WRE, Series X Size 0 ) PSI ( br)....0 GPM (0 L/min) R 9 08/0.98 R 9 08/0.98 Replces: 0.9 Chrcteristics: lve f closed loop control of direction nd volume of flow Opertion with proptionl solenoids with centrl thred nd removeble coil subplte mounting: Mounting pttern to DIN 0 m, ISO 0 nd CEOP-RP H, NP..M R nd NSI 9. D 0 Subpltes to dt sheet R 0 (seprte der), see pges 8 nd 9 Spring-centered control spool Model WRE with integrl vlve electronics Control electronics f model WR: Electronic mplifier -SP--X/ in Eurocrd fmt (seprte der), see pge 0 ) Size (Series X) see R 9 0 H/ 8/9 H/ /9 Model WR0...-X/GN9K/R with ssocited control electronics (seprte der) List of contents Contents Pge Symbols Structure nd function description, section Ordering code echnicl dt Electricl connections with model WR lock circuit digrm/terminl connection of integrl vlve electronics with model WRE Operting curves to Unit dimensions model WR 8 Unit dimensions model WRE 9 Externl control electronics f model WR 0 Model WRE0...-X/GN9K/R Symbols Model WR0 Model WR0. Model WR0. 0 b b 0 b 0 b b P P P /

2 R 9 08/0.98 Structure nd function description, section he /- nd /-wy proptionl directionl vlves re designed s direct operted units f subplte mounting. hey re operted vi proptionl solenoids with centrl thred nd removeble coil. he control of the solenoids is optionlly by mens of externl control electronics (model WR) integrl vlve electronics (model WRE). Structure: he vlve minly consists of: Housing () with mounting surfce Control spool () with compression springs ( nd ) Solenoids ( nd ) with centrl thred Optionlly integrted vlve electronics () unction description: With solenoids ( nd ) de-energized, the control spool () is held in the center position by compression springs ( nd ) Direct opertion of control spool () by energizing proptionl solenoid e.g. control solenoid "b" () Moving of control spool () to the left proptionlly to electricl input signl low from P to nd to vi ifice-like cross sections with progressive flow chrcteristics De-energizing of solenoid () control spool () is returned to the center position by compression spring () b Model WR0...-X/ 8 P 8 b Model WRE0...-X/ 8 P 8 lve with spool positions: (Model WR.. WR.. ) he function of this vlve structure is principlly the sme s with the vlve with spool positions. However, the -spool position vlves re only equipped with solenoid "" () solenoid "b" (). Insted of the nd proptionl solenoid there is n end cp (8). Note: Emptying of the tnk line is to be voided. With such conditions, check vlve ( 9 PSI ( br)) cn be instlled in the tnk line. /

3 Ordering code R 9 08/0.98 WR 0 X / G / R * W/o integrl control electronics With integrl control electronics = w/o code = E Size 0 = 0 R = urther detils in cler text PM-rectngulr rings, suitble f minerl oils nd phosphte ester Symbols 0 b P b =E E- = E- =W W- = W- f WRE: w/o code. = Commnd vlue input ± 0 DC C = Commnd vlue input to 0 m Electricl connection model f WR: Z = Plug-in connect to DIN 0 K = w/o plug-in connect, with protective cp f WRE: Z = Unit socket with plug to DIN /-pin + PE/Pg K = Unit socket -pin +PE w/o plug w/o code = N9 = w/o emergency opertion with conceled emergency opertion 0 P b = E G = Supply voltge DC X = Series 0 to 9 (0 to 9: instlltion nd connection dimensions unchnged) = W Nominl flow t PSI (0 br) vlve pressure difference 0 =.9 GPM (0 L/min) 0 =.9 GPM (0 L/min) 0 b P b = E = W With symbols E- nd W-: P : q mx : q / P : q / : q mx With symbols E- nd W-: P : q mx : blocked P : q / : q mx Note: With the spools W, W nd W there is flow from to nd to with pprox. % of the cresponding nominl cross section in zero position. /

4 R 9 08/0.98 echnicl dt ( ppliction outside these prmeters plese consult us!) Generl Instlltion position optionl, preferrbly hizontl mbient WR... ( C) to + 8 ( 0 to + 0) temperture rnge WRE... ( C) to + 0 ( 0 to + 0) Weight WR... lbs (kg). (.) WRE... lbs (kg).0 (.8) Hydrulic (mesured t ν = 0 SUS ( mm /s) nd t = 0 (0 C)) Operting pressure Pt,, P PSI (br) up to 00 () Pt PSI (br) up to 0 Nominl flow q N bei p = PSI (0 br) GPM (L/min).9 (0).9 low (mx. permissible) GPM (L/min) 9.8 () [ (0) with double flow] Pressure fluid Minerl oil (HL, HLP) to DIN Phosphte ester (HD-R) luid clenliness Mximum permissible degree of contmintion of pressure fluid to NS 8 Clss to 9. We therefe recommend filter with minimum retention rte of ß 0. Pressure fluid WR... ( C) to + 8 ( 0 to + 0) temperture rnge WRE... ( C) to + 8 ( 0 to + 0) iscosity rnge SUS (mm /s) 8 to 0 ( to 80) Hysteresis % Reversl spn % Response sensitivity % 0. requency response ( 90, signl 0 % ± 0 %) Hz 0 Electricl Insultion to DIN 0 00 exceeds NEM Clss (IP ) oltge model Signl model Direct voltge nlog Commnd signl oltge input ± 0 Current input m to 0 Input impednce oltge input Ω 0K higher Current input Ω 00 Mx. current per solenoid. Solenoid coil Cold vlue t 8 (0 C) Ω resistnce Mx. wrm vlue Ω Duty cycle % 00 Coil temperture ( C) up to 0 (0) Electricl connection WR... Plug-in connection to DIN 0/-pin + PE/Pg WRE... Plug-in connection to DIN /-pin + PE/Pg Supply voltge Nominl voltge DC Lower limiting vlue WR Lower limiting vlue WRE 9 Upper limiting vlue Current consumption of I mx.8 mplifier Impulse current Control electronics WR... mplifier model -SP--X/ in Euro-crd fmt (seprte der), see pge 0 dt sheet R 0 WRE... Integrted into vlve, see pge /

5 Electricl connection with model WR R 9 08/0.98 Coil connection Connection to plug-in connection PE PE PE PE to mplifier to mplifier Integrl vlve electronics with model WRE Pin lloction unit plug Integrl electronics (see below) Commnd vlue: C D E Pin Signl Supply DC (9 to DC) voltge GND (0 ) C do not connect (0 ) Differentil D Commnd vlue (± 0 / to 0 m) input E Reference potentil PE do not connect Protective ground Reference potentil t E nd positive commnd vlue ( to 0 m) t D cuses flow from P to nd to. Reference potentil t E nd negtive commnd vlue ( to m) t D cuses flow from P to nd to. With vlve with solenoid on side (spool vritions E nd W) reference potentil t E nd positive commnd vlue t D cuse flow from P to nd to. Conn. cble: Recommendtion: up to 80 ft ( m) cble length strnded 8 WG (LiYCY x 0. mm ) up to 0 ft (0 m) cble length strnded WG (LiYCY x.0 mm ) Externl dimeters 0. to 0. inches (. to. mm) Only connect shield to erth ground PE on supply side. lock circuit digrm/terminl connection of integrl vlve electronics Commnd vlue ±0 to 0 m Reference potentil D E Differentil mplifier Rmp genert Summtion Output stge ) I do not connect C 0 Step function genert Low voltge detection Output stge ) I Supply voltge: 0 Protective ground PE Power supply unit + i 0 i Protective gound ttched to vlve housing nd cover Rmp cn be externlly djusted from 0 to s ( up down ) ) Output stges current-regulted /

6 R 9 08/0.98 rnsition functions with electricl step input signls Stroke in % Signl chnge in % ime t in ms Operting curves (mesured t ν = 0 SUS ( mm /s) nd t = 0 (0 C)).9 GPM (0 L/min) Nominl flow t 0 br vlve pressure difference low in GPM (L/min) (0) (0) (0) (0) (0) P / P / GPM (0 L/min) Nominl flow t 0 br vlve pressure difference low in GPM (L/min) (00) (80) (0) P / P /, Commnd vlue in % p = PSI (0 br) constnt p = 90 PSI (0 br) constnt p = PSI (0 br) constnt p = PSI (0 br) constnt p = 0 PSI (00 br) constnt Commnd vlue in % p = lve pressure difference to DIN (Input pressure minus lod pressure nd minus return pressure) Double flow with.9 GPM (0 L/min) nominl flow spool low in GPM (L/min) / (0) (00) (90) (80) (0) (0) (0) (0) (0) P / P / Commnd vlue in % p =. PSI ( br) constnt, single edge p = PSI (0 br) constnt, single edge p = 8 PSI ( br) constnt, single edge p = PSI ( br) constnt, single edge p = PSI (0 br) constnt, single edge Double flow with.9 GPM (0 L/min) nominl flow spool low in GPM (L/min) (80) (0) (00) (80) (0) P / P / Commnd vlue in % p = lve pressure difference to DIN (input pressure minus lod pressure nd minus return pressure),

7 Power limit (mesured t ν = 0 SUS ( mm /s) nd t = 0 (0 C)) Nominl flow.9 GPM (0 L/min) low in GPM (L/min) (0) (0) (0) (0) (0) P / P / Nominl flow.9 GPM (0 L/min) 0 low in GPM (L/min) (00) (0).. 0 P / P / R 9 08/ (0) (00) (0) (00) (00) Input pressure in PSI (br) (0) (00) (0) (00) (00) Input pressure in PSI (br) Double flow with.9 GPM (0 L/min) nominl flow spool. P / (00). P / low in GPM (L/min) (80) (0) (0) (00) (0) (00) (00) Input pressure in PSI (br) Double flow with.9 GPM (0 L/min) nominl flow spool low in GPM (L/min) (80) (0) (00) (80) (0) P / P / (0) (00) (0) (00) (00) Input pressure in PSI (br) Commnd vlue = 0 % Commnd vlue = 0 % Commnd vlue = 0 % Commnd vlue = 0 % Commnd vlue = 80 % Commnd vlue = 90 % Commnd vlue = 00 % Double-flow exmple /

8 R 9 08/0.98 Unit dimensions model WR0: dimensions in inches (millimeters) 0.000/.0 in 0.0/00 mm (R mx ) 0. (). (9). (). () P Required surfce finish of mting piece.8 ().8 () (0). (8). (9) 0.9 () b. (0) (0.) 0.9 ().0 (0) 8.8 (,) (0) lve housing Proptionl solenoid "" Proptionl solenoid "b". Z-plug "", col grey; der no. RR Z-plug "", col blck; der no. RR Nmeplte lve bleed bolt Note: lves re bled befe delivery. Emergency opertion N9 8 R-ring (.0 x. x.0 mm); Pts,, P, 9 Plug bolt f vlve with one solenoid ( switching positions, models E, W, E W) 0 Spce requirement f removl of plugs Mchined vlve mounting surfce, Position of pts to DIN 0 m, ISO 0 nd CEOP-RP H, NP/NSI D 0 Subpltes to dt sheet R 0 nd vlve mounting bolts must be dered seprtely. Subpltes: G/0 (/8" NP) G/0 (/" NP) G/0 (/" NP) G/ (SE-; 9/-8) G/ (SE-8; /-) G/ (SE-; -/-) lve mounting bolts: ) /-0 UNC x -/" (M x 0) DIN 9-0.9, grde 8 better que M =. lb-ft (. Nm) 8/

9 Unit dimensions model WRE0: dimensions in inches (millimeters) R 9 08/ /.0 in 0.0/00 mm (R mx ) 0. (). (). (9). () P Required surfce finish of mting piece.8 ().8 () 0.8 (0). (8). () b. (0) (0.) 0.9 ().0 (0) 8.8 (.).9 (0) (0) lve housing Proptionl solenoid "" Proptionl solenoid "b" Z-plug, pin + PE; der no. RR00 0 Nmeplte lve bleed bolt Note: lves re bled befe delivery. Emergency opertion N9 8 R-ring (.0 x. x.0 mm); Pts,, P, 9 Plug bolt f vlve with one solenoid ( switching positions, models E, W, E W) 0 Spce requirement f removl of plugs Mchined vlve mounting surfce, Position of pts to DIN 0 m, ISO 0 nd CEOP-RP H, NP/NSI D 0 Subpltes to dt sheet R 0 nd vlve mounting bolts must be dered seprtely. Subpltes: G/0 (/8" NP) G/0 (/" NP) G/0 (/" NP) G/ (SE-; 9/-8) G/ (SE-8; /-) G/ (SE-; -/-) lve mounting bolts: ) /-0 UNC x -/" (M x 0) DIN 9-0.9, grde 8 better que M =. lb-ft (. Nm) 9/

10 R 9 08/0.98 Control electronics f model WR0.-X/ : mplifier -SP- (seprte der) echnicl dt Operting voltge DC : DC upper limiting vlue DC (t) mx : lower limiting vlue DC (t) min : Solenoid current I mx :. Pulse frequency (output stge) f : 0 to 0 Hz Crd dimensions: Euro-crd.9 x. inches (00 x 0 mm) DIN 9 rontplte dimensions Height: U (.0 inches (8. mm) Width soldering side: HP (0. inches (.08 mm) Width component side: HP Detiled infmtion: Dt sheet R 0 lock circuit digrm/terminl connection X X Commnd vlue Commnd vlue Commnd vlue Commnd vlue Commnd vlue ± ± 9 ± 9 ± 9 ± 9 c c 8 0 0c R R R R t K I w R PI 8 8 i 0 Solenoid "" Comm vlue fter rmp Differentil Comm vlue input Reference potentil/ GND "Enble" externl (+ DC ) ± 9 ux. voltge Mesuring zero (M0) is rised 9 compred to 0 operting voltge! Cll-up comm vlue Cll-up comm vlue Cll-up comm vlue Cll-up comm vlue Cll-up "Rmp off" Cll-up K Rely cll-up voltge (+ ) + 9 M0 9 8 c J 0c 0c 0 c 8c c 8c c 8c K + DC Positive commnd vlue ( to 0 m) controls solenoid "b" Negtive commnd vlue ( to m) controls solenoid "" K K H K /i J J K K K K + H to H K to K R to R R R8 t K Σ K J, J K H H H H = 0 = 9 = 0 Σ. M = LED-indiction f comm vlue cll-ups = Cll-up rely = Commnd vlues = ising current solenoid "" = ising current solenoid "b" = Rmp time 00 µ I R8 PI = on frontplte H 8 i 8 c c + DC Solenoid "b" "Redy f opertion" Operting voltge 0 Commnd vlues Differentil input ; Summtion Rmp genert Step function PI current controller 8 Output stge with pulse genert 9 Power supply 0 Monitings Moniting cble brek (only with to 0 m) 0/

11 Ordering code R 9 08/0.98 -SP X/ mplifier f proptionl directionl vlve WR0-X = Series 0 to 9 = X (0 to 9: technicl dt nd terminl connection unchnged) * = = urther detils in cler text rmp time rmp times /

12 R 9 08/0.98 Notes / Mnnesmnn Rexroth Cption Rexroth Hydrulics Div., Industril, City Line Rod, ethlehem, P 80- el x: 9-8 Rexroth Hydrulics Div., Mobile, 00 Old Mnsfield Rod, Wooster, OH 9-09 el. (0) -00 x: (0) - ll rights reserved Subject to revision Printed in U.S..