Dual Coil PWM Valve Drivers

Dual Coil Proportional Valve Drivers

Power-Line, the universal single or dual coil PWM driver to stock for your open loop amplifier, electronic HP limiter and closed loop speed control applications.

FEATURES:

Inputs:

● Pulse input with a minimum impedance of 100K ohms

● Enable In - Digital input to turn unit OFF or ON

● Direction In - Digital input to select which coil to drive

● Command In - Analog voltage input to be used with a 10K Ohm pot, accepts 0 to 5 VDC or 0 to 10 VDC or Pulse.

Outputs:

● Single (software selectable) or Dual proportional output

● Regulated 5 Vdc command pot reference voltage

Current Capabilities:

● Current ranges include maximum values of 3.0 Amps

● Optimized current ranges for two EDC valves in series or a single EDC valve

Setup and Installation:

● Interconnect is through a 12-position terminal strip that will accept up to 12 AWG wire

Diagnostic onboard LED’s:

● PWM% LED is provided for each valve coil

● Error LED flashes for any detected error

● PWR OK LED indicates correct power levels

User settings and adjustments to the regulation process are made via a computer through the Serial Communications System.

The HAD, a dual coil proportional valve driver, provides precise control of a dual coil proportional valve and enables the user to add ramping and/or dither to minimize stiction and hysteresis of the valve.

Control Inputs:

● Accepts control inputs of -5V to +5V, 0 to +10V, 4 to 20 mA or an external potentiometer.

Power Supply:

● Power supply voltage range is from 11.5 - 26 volts. (12 or 24 Volt Systems)

● Red power LED indicates sufficient power present for proper operation.

● The coil can be driven to within one volt of the power supply voltage at maximum current.

Current Capabilities:

● The HAD Series can drive coils with requirements up to 3.3 amps

● Current to the coil is regulated to compensate for coil resistance change, power supply voltage fluctuations and voltage drops in the wiring going to the coil.

Pulse Width Modulation (PWM):

● Variable current is achieved by high frequency PWM to shift the valve spool.

● High frequency PWM also provides excellent current regulation against power supply fluctuation and ripple or coil resistance change.

Options:

● Weatherpack Connectors with 6-inch leads.

● Single-turn waterproof potentiometer with bezel marked 0 to 100.

ENVIRONMENTAL

● Operating Temperature: -20 Celsius to +60 Celsius