HAU Product Manual Instruction, Installation and Operation Guide for: HAU Series Controllers Document Number: 021-00140 Document Revision: B.2 Document Issue Date: Document Creator: G.Gotting Document Creation Date: 4/21/2011 High Country Tek, Inc. 208 Gold Flat Court Nevada City, CA, 95959. Tel:- (1) 530 265 3236 www.hctcontrols.
HAU Product Manual HAU – Single Coil Proportional Valve Driver Description: The HAU Valve Driver is a single coil proportional valve driver that provides precise control of a single coil proportional valve by controlling current through Pulse Width Modulation. The HAU will accept control inputs of –5V to +5V, 0 to +10V, 4 to 20 mA or an external potentiometer. It will accept power supply voltages from 11 to 30 volts DC and is able to drive coils with requirements up to 5 amps.
HAU Product Manual Setup Procedure: Compare the part number on your unit to the Part Number Index in Figure 1 for an explanation of options specific to your unit. This controller is best adjusted by observing the system response. Coil current can be used, but coil voltage is not accurate. INITIAL SETUP: 1. 2. 3. 4.
HAU Product Manual RAMP Adjustments (Optional): If the unit has one ramp potentiometer it will adjust the ramping function for both directions of control to the same setting. If the unit has two ramp potentiometers, RAMP UP will adjust the ramp time for current increases and RAMP DOWN will adjust for decreases in current.
HAU Product Manual Troubleshooting: If the set up procedure does not achieve the desired results, double check the wiring and perform the following tests. Record the test results. Tools required: A battery operated multi meter and a small screwdriver are required. Check the power input: The card will not function correctly unless the +POWER to PWR COM voltage is at least 11 V. If this voltage is more than 30 V the card may be damaged.
HAU Product Manual If the +COIL to -COIL terminals are shorted, the valve driver will shut down its output until the short is removed. Disconnect the wires going to the +COIL and -COIL terminals and measure the resistance between the wires to ensure the coil is in good condition and within resistance range given by the manufacturer Check the card at full on & full off: NOTE: Do not try the full on test if the power supply is 50% higher than the coil's rated voltage.
HAU Product Manual When the coil heats up in use, it increases its resistance. Most coils will still be able to draw sufficient current to fully shift the valve if their rated voltage is supplied to the card and the card on maximum output causes less than 1V drop. When this is not the case, you must use a coil rated for less voltage or increase the power supply voltage. The card will have no trouble driving a 12 V coil from a 24 V supply, or a 10 V coil from a 12 V supply for example.
HAU Product Manual Controller Connection Information: Measured Coil Current NOTE: Use AGC5 fuse up to 3 amps and AGC10 upto 5 amps Expected Coil Current 3.500 3.000 2.500 Coil Current 2.000 (Amps) 1.500 1.000 0.500 1.000 2.000 3.000 4.000 5.000 6.000 7.000 8.000 9.000 10.000 Control Voltage (Volts) The HAU series of controllers has a very linear command input to current output curve to ensure the best flow or pressure characteristic is achieved from the product being driven.
HAU Product Manual Key Code Ordering Information: H A U K R F 1 4 0 - Max. Current Range: Z E K G M = = = = = 0mA to 500mA 0mA to 1A 0A to 1.7A 0A to 3A 0 to 5A Ramp Select: S = Single pot. adjustment f or up & down R = Indiv idual adjustments f or up & down Dither Frequency Pre-set by factory: N = NO dither f requency potentiometer installed Fxxx = Pre-set to user chosen dither f requency xxxHz Frequency is in Hertz, use all three digits with leading 0 if required: i.e.
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