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EVDR Dual Valve Driver

DESCRIPTION

A convenient, plug-mounted microprocessor-based controller for use on a hydraulic

proportional valve coil. The input signal to the controller can be confi gured as voltage,

current, resistive, or PWM.

OPERATION

The EVDR1 can be confi gured for a SINGLE or DUAL OUTPUT control based on

a single input signal. A single output would be used to control a single solenoid

proportional valve coil for fl ow or pressure control. It could be confi gured to increase

or decrease the output current as the input increases. All input and output endpoints

and breakpoints can be adjusted via a PC interface and confi guration software.

A dual output would be used to control a dual solenoid proportional valve. For a

dual control the input would be a joystick that is spring loaded to the center position

where both outputs would be OFF. As the joystick is stroked in one direction the

corresponding output would increase to adjust the valve and the other output would

remain OFF. When the joystick is stroked the opposite direction the other output will

respond. Again all input and output endpoints and breakpoints are adjustable and the

dual slope will have a center deadband width that is also adjustable.

EFDR Fan Drive controller

DESCRIPTION

A convenient, plug-mounted microprocessor-based controller intended for use on a

TSxx-21 or TSxx-27 hydraulic proportional valve for fan control applications. The input

signal to the controller can be a temperature sensor, PWM, voltage, or current.

OPERATION

This fan drive controller can be confi gured for a single or dual output control based

on a single input signal. A single output would be used to control a single solenoid

proportional valve coil for fl ow or pressure control. As the temperature increases the

current decreases. All input and output endpoints and breakpoints can be adjusted

via a PC interface and confi guration software.

There are two modes of automatic operation: On/Off and Proportional. There is also

a Reversing feature which allows the operator to blow any debris out of the radiator

by reversing the direction of fan rotation.

ETDR Transmission Controllers

DESCRIPTION

A convenient, plug-mounted microprocessor-based controller for use on a hydraulic

proportional valve coil. The input signal to the controller can be confi gured as voltage,

current, resistive, or PWM.

OPERATION

The ETDR1 can be confi gured to provide a smooth clutch operation on a

transmission. The controller will output the required current to fi ll the clutch , hold

the output and then ramp the current output to full engagement of the shift. This will

happen under a confi gurable preset timed function when the neutral to in gear is

required. See Clutch Engagement Profi le graph below.

Once the transmission is engaged the controller will also operate in the inch/troll

which will allow slow precise control based on the amplitude of the input signal.

The input signal can originate from a joystick type device with PWM, Voltage, or

Resistance output. The two outputs of the ETDR1 provide for both forward and

reverse control

Drivers for Hydraulic Proportional Valves