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A printed circuit board-style (PCB) control amplifier for controlling HydraForce proportional valves. Remote mounting in a protected enclosure is required.
This control module uses closed-loop current control with superimposed dither to supply a proportional valve solenoid with a proportional control signal. The input signal to this controller can be from a 10K potentiometer, 0–5 VDC, 0–20 mA,
or from other pre-set levels.
• Adjustments and connections clearly labeled.• LED indication of output power level, input level and power on/off.
• One unit covers supply voltages from 9 to 32 VDC.
• No internal fuses; circuit limits current electronically.
• Short circuit proof and reverse polarity protected.
• Can be disconnected from coil when powered.
• Maximum current adjustment does not affect minimum current setting.
• Independent ramp adjustments and internal supply for potentiometer.• Filter eliminates electrical noise.
• Dither frequency and amplitude are adjustable for maximum valve performance.
Supply Voltage: 9–32 VDC Coil rating must be matched with supply voltage: RCOIL ≤ (VSUPPLY – 1.5 V) / I-Max.
Control Input Signal Options: 10K external potentiometer (accepts 5K to 50K pots), or 0–5 VDC signal, or 0–20 mA current signal (see connection diagrams)
Input Resistance: Voltage: 250K Ohms; Current: 33 Ohms
Output Current: up to 2000 mA (see ordering info.)
Minimum Current Range: 0–500 mA (adjustable; see ordering info.)
Maximum Current Range: 600–2000 mA (adjustable; see ordering info.)
Ramp Up and/or Down: 0.01–5.0 seconds (independently adjustable)
Dither Frequency: 70–350 Hz (adjustable)
Dither Amplitude: 0–10% of maximum current (adjustable)
Operating Conditions: –40° to 85°C; 0 to 85% relative humidity
3.426.1
Proportional Valve Controller—PCB Only—
SCHEMATICSTEP-DOWNCONVERTERVPS TO 5.5 VSTEP-UPDC/DCCONVERTERINPUT, OUTPUTANDPOWER SUPPLYINDICATORSSOLENOIDOUTPUTDITHERAMPLITUDEACTIVEREVERSE POLARITYPROTECTIONDITHERGENERATORCURRENT SENSING AND SHORT CIRCUITPROTECTIONVPS POWERGNDPOTENTIOMETER INPUT +–S2S1RMI-MAX.RAMP UPRAMP DOWNRMAX.ERRORAMPLIFIERLOWPASSFILTER+–RDARMIN.I-MIN.+5 VRDDITHER FREQUENCYRDITHERINDEPENDENTRAMP CONTROLFUNCTIONVOLTAGETO HIGH FREQUENCYPWMCONVERTERSIGNAL GNDCURRENT IN(0-20 mA)ENABLEVOLTAGE IN(0-5 VDC)VOLTAGEREFERENCEGENERATOR+5 VREFERENCE +12 V–12 V+5 V(9-32 VDC)CF
GENERAL SPECIFICATIONS
Weight: 25 g (0.88 oz.)
Connections: Screw terminals for 16–30 AWG wire
CSA Listing:CSA C22.2 No. 14-M91
