Hau – single coil proportional valve driver, Description, Indicators – High Country Tek HAU Series User Manual
Page 2: Wiring, Fusing, Hau product manual
HAU Product Manual
High Country Tek, Inc.
208 Gold Flat Court
Nevada City, CA, 95959.
Tel:- (1) 530 265 3236
021-00140_HAU_User_Guide_Rev_Bp2
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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.
Options include ramping, dither, waterproof potentiometers and WeatherPack connectors.
Indicators:
PWR LED –
Lights when the power supply voltage is above 10.5V.
The unit will not function correctly if this lamp is off or blinking.
PWM% –
Indicates the duty cycle to the coil by going from RED (full off) to GREEN (full on). The
ratio of red to green gives a relative indication of current flow through the coil as an aid to
tuning and troubleshooting.
Wiring:
Hook up the unit as shown in Figure 2, using only one of the three control input configurations. Use 16
AWG wire for power and coil wiring. Use shrouded coil connectors. Locate the fuse as close to the
power supply as possible to protect the wiring and the valve controller.
Fusing:
Use only an ACG-5 fuse for current ranges up to 3.33 amps, or an ACG-10 fuse for 3.34 to 5.00 amp
coils.
Failure to properly fuse the unit invalidates the warranty.