4-20 mA Input (4)
A DIN rail-mount style control amplifier for HydraForce proportional valves. Remote mounting in a protected enclosure is required. This model is designed for circuits with long wire runs or where electrical interference is a problem.
Product Operation
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 4–20 mA source.
Product Features
• 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.• Current sensing circuit maintains output current regardless of changes in input voltage or coil resistance.• Filter eliminates electrical noise;
Independent ramp adjustments.
• Dither frequency and amplitude are adjustable for maximum valve performance.
Product Ratings
Supply Voltage: 9–32 VDC Coil rating must be matched with supply voltage: RCOIL ≤ (VSUPPLY – 1.5 V) / I-Max.
Control Input Signal: 4–20 mA current signal (see connection diagram)
Input Resistance: 50 Ohms
Output Current: up to 2000 mA (see ordering info.)
Minimum Current Range: 0–500 mA (adjustable)
Maximum Current Range: 600–2000 mA (adjustable)
Ramp Up and/or Down: 0.01–5.0 seconds (independently adjustable)
Dither Frequency: 70–350 Hz (±10%)
Dither Amplitude: 0–10% of maximum current (adjustable)
Operating Conditions: –20° to 85°C; 0 to 85% relative humidity
3.436.1
Proportional Valve Controller—DIN Rail Mount—
SCHEMATICSTEP-DOWNCONVERTERVPS TO 5.5 VSTEP-UPDC/DCCONVERTERINPUT, OUTPUTANDPOWER SUPPLYINDICATORSSOLENOIDOUTPUTDITHERAMPLITUDEACTIVEREVERSE POLARITYPROTECTIONDITHERGENERATORCURRENT SENSING AND SHORT CIRCUITPROTECTIONVPS POWERGNDCURRENT LOOP TRANSMITTER+–S2S1RMI-MAX.RAMP UPRAMP DOWNRMAX.ERRORAMPLIFIERLOWPASSFILTER+–RDARMIN.I-MIN.+5 VRDDITHER FREQUENCYRDITHERINDEPENDENTRAMP CONTROLFUNCTIONVOLTAGETO HIGH FREQUENCYPWMCONVERTERANALOG GNDCURRENT IN(4-20 mA)NOT USEDENABLENOT USED+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
