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hydraulicsELECTROHYDRAULICSOLUTIONSThis guide provides several examples of electro-hydraulic (E-H) solutions basedon Sun’s XMD valve drivers and electro-hydraulic valves. Sample circuits illustratepump and cylinder control, motor speed control, fan drive control and otherpressure and flow control applications. Examples of closed-loop PID pressurecontrol, position control and speed control use Sun’s CANpoint XMD ConfigurationSoftware for quick set-up and configuration.The circuits in this document are intended as general technical examples or startingpoints for new circuit design and should not be relied upon as final designs forspecific applications.Pub.#999-902-104Sun Hydraulics LLC 1500 West University Parkway Sarasota, Florida 34243 USA 1 941 362 1200www.SunHydraulics.com

E-H SolutionsMarket:MOBILE, INDUSTRIALApplication:PUMP CONTROLFunction:PRESSURE CONTROLHydraulic Displacement Control (HDC):XMD-02 for Directional Axial Piston PumpsDisplacement100%-b-aSignal Pressure X10Signal Pressure X2ab100%Fig. 2Fig. 1This solution combines the XMD-02 withtwo PRDLs to control the displacement andswashplate angle of an axial piston pumpby controlling the two pilot pressure lines(X1 and X2). Using Sun’s CANpoint XMDconfiguration software, the user can quicklyand easily configure the XMD to controlpumps from several manufacturers.2 / E - H S O LU T I O N S L I B R A R YIn Figure 1, the XMD is configured tocontrol two electro-proportional valvesusing a single input to control thedisplacement and swash plate angle ofan axial piston pump.Figure 2 is a simplified diagram thatcorrelates the pump signal pressure topump displacement and direction.Related Products XMD-02 dual-output driver Two U8M line-mount manifolds PRDL-X*N - Electro-proportional,direct-acting pressure-reducing/relieving valve with open transition -XSN 10-100 psi (3,5-33,5 bar)-XEN 25-250 psi (1,7-18 bar)-XDN 50-485 psi (3,5-33,5 bar)-XBN 100-1125 psi (7-77,.5 bar) 2021 Sun Hydraulics LLC

E-H SolutionsApplication:SAW FEEDMarket:MOBILE, INDUSTRIALFunction:SPEED CONTROLDirectional Cylinder Control:XMD-02 for Feed Cylinder ControlCAN J1939FMDAFMDAThis solution combines the XMD-02 withtwo FMDA 3-way, meter-in proportionalcontrol valves that control the speed of afeed cylinder to a saw motor.CANpoint can be used to configure theXMD-02 to reduce the opening of theFMDA by reducing the output if thepressure at the motor inlet rises too high.The universal input is used for thecommand signal. The pressure switchon the digital input (enable) will stopthe advance of the feed cylinder if thesaw motor is bogged down and creatingexcessive torque. Using ramps on theoutputs will produce smooth accelerationand deceleration of the feed cylinder.The two independent PWM outputs can beconfigured for the FMDA 3/2 proportionalcontrol valves. These can be sized forthe appropriate flow rate based on thecylinder ratio.Related Products XMD-02 dual-output driver FMDA-X*N - Electro-proportional3-way flow control valve, meter in CBCA-L*N - 3:1 pilot-ratiocounterbalance valve 2021 Sun Hydraulics LLC-XAN 0.1-1.6 gpm (0,4-6,1 L/min)-XBN 0.1-4 gpm (0,4-14 L/min)-XCN 0.1-6 gpm (1-28 L/min)-XDN 0.1-9 gpm (1-40 L/min) -LBN / -LIN 400-1500 psi (28-105 bar) -LHN / -LAN 1000-4000 psi (70-280bar)CBEH-L*N - 10:1 pilot-ratiocounterbalance valveE - H S O LU T I O N S L I B R A R Y / 3

E-H SolutionsMarket:MOBILE, MARINEApplication:MAIN CONTROL VALVEFunction:DIRECTIONAL CONTROLHydraulic-to-Electric Pilot Conversion: XMD-02 forRemote Hydraulic Pilot-Controlled Directional Valves100%EnableDisplacementCAN J1939-b-aSignal Pressure X10Signal Pressure X2ab100%Fig. 2Fig. 1This solution combines the XMD-02 withtwo PRDLs to control the FTCC meter-inproportional directional valve. The twoPRDLs control the two pilot pressure lines(X1 and X2) to control the flow and directionof the directional valve.CANpoint XMD configuration software canhelp users configure the XMD to control awide range of pilot-operated proportionaldirectional valves.4 / E - H S O LU T I O N S L I B R A R YIn Figure 1, the XMD is configured to controltwo electro-proportional valves using asingle input to control the two signalpressures (X1 and X2).Figure 2 is a simplified diagram thatcorrelates the output signal pressure tothe displacement and direction of theproportional directional valve.Related Products XMD-02 dual-output driverTwo C4I line-mount manifoldsU6F line-mount manifoldFT*C - 4-way, 3-position, meter-inproportional directional valve PRDL-XDN - Electro-proportional,direct-acting pressure-reducing/relieving valve with open transitionand operating range of 50-485 psi(3,5-33,5 bar) 2021 Sun Hydraulics LLC

E-H SolutionsMarket:MOBILE, INDUSTRIALApplication:PRESSURE CONTROLFunction:PRESSURE CONTROLPressure Control: XMD-01 for Precise Pressure Relief6000Pressure (psi)50004000300020001000001020304050607080901000 - 100% Coil CurrentRBAP-XANRBAP-XDNRBAP-XBNRBAP-XWNFig. 1Fig. 2This solution utilizes the precision of theRBAP electro-proportional pressure reliefvalve and the XMD-01 to control systempressure. This solution can control appliedforce in press applications or to de-strokepumps.The XMD-01 offers a single universalinput and CAN bus input for maximumconfigurable options. The user can controlpressure directly using a potentiometer orvia the primary machine controller. 2021 Sun Hydraulics LLCUsing Sun’s CANpoint XMD configurationsoftware, the user can configure the XMD tocontrol a wide range of electro-proportionalrelief valves.In Figure 1, the XMD is configured tocontrol an RBAP electro-proportional reliefvalve using a single input.Figure 2 depicts the various RBAP pressureranges and accuracy.Related Products XMD-01 single-output driver WFN line-mount manifold RBAP-X*N - Electro-proportionalrelief valve -XDN 50-750 psi (3,5-33,5 bar)-XBN 150-1500 psi (10,5-105 bar)-XAN 300-3000 psi (20-210 bar)-XWN 500-5000 psi (35-350 bar)E - H S O LU T I O N S L I B R A R Y / 5

E-H SolutionsMarket:MOBILE, INDUSTRIALApplication:MOTOR CONTROLFunction:MOTION CONTROLPressure-Compensated Flow Control:XMD-01 for Motor Speed ControlThis solution uses the XMD-01 to controlSun’s FPCC electro-proportional flow controlvalve for speed control of unidirectionalhydraulic motors.The XMD in this solution is configured tocontrol a single electro-proportional flowcontrol valve using a single input to controlthe flow through the hydraulic motor.In this circuit, the LPFC modulatingelement acts as a compensator. The loadpressure adds to the setting of thecompensator in order to maintain thepressure drop across the flow control valve.In open loop, this helps to maintain flowacross the flow control valve for a consistentmotor speed under varying loads.Using Sun’s CANpoint XMD configurationsoftware, the user can easily configure theXMD to control a wide range of electroproportional flow control valves.Related Products XMD-01 single-output driverECJ line-mount manifoldA3K line-mount manifoldFPCC-X*N - Electro-proportionaldirectional valve LPFC-X*N - Normally openmodulating element 6 / E - H S O LU T I O N S L I B R A R Y-XAN 0.1-1.5 gpm (0,4-5,7 L/min)-XBN 0.15-3.5 gpm (0,6-14 L/min)-XCN 0.25-7 gpm (1-28 L/min)-XDN 0.25-10 gpm (1-40 L/min)-XDN 50 psi (3.5 bar)-XFN 100 psi (7 bar)-XGN 150 psi (10,5 bar)-XHN 200 psi (14 bar) 2021 Sun Hydraulics LLC

E-H SolutionsMarket:MOBILE, INDUSTRIALApplication:CYLINDER CONTROLFunction:MOTION CONTROLDirectional Cylinder Control:XMD-02 for Load-Holding Cylinder ControlThis solution combines the XMD-02 driverwith Sun’s counterbalance and electroproportional flow control valves for simpledirectional control of a cylinder with loadholding capabilities.In this circuit, the XMD is configured tocontrol two FMDA valves that control thespeed and direction of the cylinder usinga single input. The two FMDA proportional3-way valves are used as meter-in elementsknown as Sun’s cushion lock circuit. (Theflow path from the two counterbalancevalves is from the FMDA work ports to tank.)This circuit shows a combination of orifices toreduce the effective setting of pilot pressure(splitter orifice). It also delays the openingof the counterbalance valve. Both help tofurther dampen the circuit but requiressetup time and fine tuning on the machineand does cause leakage.CAUTION: Small orifices in the pilot line cantrap pressure and keep the load-holdingvalve in an open position. Reverse free-flowcheck valves are recommended so the loadholding valve can close quickly.Related Products XMD-02 dual-output driverYCCD assemblyTwo A2K line-mount manifoldsFMDA-X*N - Electro-proportional3-way flow control valve, meter in -XAN 0.1-1.6 gpm (0,4-6,1 L/min)-XBN 0.1-4 gpm (0,4-14 L/min)-XCN 0.1-6 gpm (1-28 L/min)-XDN 0.1-9 gpm (1-40 L/min) CBCA-L*N - 3:1 pilot-ratiocounterbalance valve -LIN 400-1500 psi (28-105 bar) -LHN 1000-4000 psi (70-280 bar) CXCD-X*N - Check valve 2021 Sun Hydraulics LLCE - H S O LU T I O N S L I B R A R Y / 7

E-H SolutionsMarket:MOBILE, INDUSTRIALApplication:RAPID CYLINDER EXTENSIONFunction:POWER REGENERATIONRegenerative Assembly:XMD-01 for Rapid Cylinder ExtensionThis solution utilizes the same pump flow todouble the extension speed of a single-rodcylinder without using a larger pump. Toachieve this, oil from the rod end of thecylinder (CR) is added to the pump flow tothe blind end (CF), increasing the rate ofextension. It incorporates open-loop controlusing an XMD-01 and a 0–10-Vdc pressuretransducer as the sensor feedback.regenerative flow will decrease until rodend flow is fully diverted to tank (VR). Fullpump pressure is then applied to the blindend, generating maximum force.NOTE: The ideal cylinder ratio to use withregeneration is 2:1, with the blind end areabeing twice what the annular area is at therod end. A 2:1 cylinder in regen gives thesame speed extending as retracting.Related Products XMD-01 single-output driverFAK line-mount manifoldECK line-mount manifoldRVCL-LJN - Solenoid-operated, twostage, field-adjustable pressure reliefvalve with an operating range of300–5000 psi (20–350 bar)As the load is engaged and pressure in theblind end rises to the specified pressure,the solenoid valve will be engaged and the CODA - Pilot-to-close check valve8 / E - H S O LU T I O N S L I B R A R Y 2021 Sun Hydraulics LLC

E-H SolutionsMarket:MOBILE, INDUSTRIALApplication:PUMP CONTROLFunction:TWO-PUMP HIGH-LOWPump Unloading Assembly:XMD-01 for Two-Pump High-Low UnloadingThis assembly utilizes a pressure sensor as thesystem feedback to electro-proportionallycontrol the unloading of a low-pressure/high-flow pump in a two-pump high-lowsystem.This type of system uses the flow of twopumps to deliver increased speed to anactuator. Once resistance is encounteredand the requirement switches from highspeed to high force or torque, then thelow-pressure/high-flow pump is unloadedback to tank at minimum pressure. At thatpoint, all available horsepower is directedto the high-pressure/low-flow pump. 2021 Sun Hydraulics LLCThis assembly also provides a system reliefvalve. Adding ramps for unload and loadfunctions provides smooth transitions.Energize the solenoid valve to dump thehigh-flow, low-pressure pump to tank whenthe system reaches a specified pressure(High Pressure).De-energize the solenoid valve to buildsystem pressure at the system-specified lowpressure (Low Pressure).Note: You can use Sun’s T-8A pilot cavityconcept in this application to achievegreater flow capacities for pressure reliefvalves.Related Products XMD-01 single-output driverFAK line-mount manifoldGAL line-mount manifoldAAJ line-mount manifoldRBAN-X*N - Electro-proportionalinverse pressure relief valve -XDN 800-300 psi (55-20 bar)-XBN 1500-800 psi (105-55 bar)-XAN 3000-1500 psi (210-105 bar)-XWN 5000-3000 psi (350-210 bar)E - H S O LU T I O N S L I B R A R Y / 9