Electronic Vehicle Controls - Valve Drivers - Fan Control Applications


Plug-in style, dual output valve driver, fan control



A compact plug-in style, microprocessor based valve driver designed for use on hydraulic proportional valves for fan drive applications. Configurable to drive two coils using SAE J1939 CAN input or an independent signal. TheEFDR-0201A proportionally controls one coil to a user-defined metering profile and provides reverse sequence control with the second coil providing fan direction. The profile provides either a straight-line or multi-sloped output that you configure withHF-Impulse software: an easy to use, configuration tool available as a free download atwww.hydraforce.com/electronics. Two output LEDs are located on the front.


The controller accepts inputs from commonly available sensors or SAE J1939 CAN input. The input signal drives the output current to the user-defined ramp rate, enabling accurate control of fan speed. Reverse sequence control is provided as well. The reverse sequence changes the direction of the fan to clear debris. A variety of methods can trigger the sequence (switch input, temperature sensor, J1939 message or periodic.) The timing sequence can control the fan speed as well as the fan direction to avoid abrupt reversals. Built-in diagnostics detect fault conditions that automatically deactivate the outputs. The controller has two LED output indicators.

Diagnostic Features

  • Any supply voltage below 8.5 Vdc causes the controller to default to the valve-off mode.
  • The driver output drops and holds at the inactive stand-by condition.
  • Any short or open circuit condition is automatically detected as an error.
  • When the fault is corrected, the controller returns to standard operation.

Multiple Personalities

The EVDR controller is available in multiple configurations (personalities) to suit the needs of specialized applications. Choose the one that best fits your needs.

EVDR-0201A - General Purpose.

EDFR-0201A - Fan Control.

ECDR-0201A - Configurable.

Electrical Parameters
Power requirements:
  • 9 to 32 Vdc
Output current:
  • 0 to 2000 mA Continuous
Processor and Memory
  • ARM 32-bit Cortex™-M3 CPU, 72 MHz
Flash memory:
  • 64 kB
  • 20 kB
Mating connectors:
  • Deutsch DT06-8SA Input
  • DT04-2P Output
Output indicator:
  • 2 Red LEDs
Environmental rating:
  • IP69K
Operating temperature:
  • –40 to 85 °C (–40 to 185 °F)
Unit weight:
  • 0.079 kg (0.175 lb) without connectors
Number of inputs:
  • 1
Number of outputs:
  • 2
  • 0 to 5 Vdc
  • 0 to 10 Vdc
  • 0 to 20 mA
  • 4 to 20 mA
  • 0 to 6000 Ohm
  • ERT 120 (HydraForce temperature sensor)
  • Switch to battery
  • Switch to open
  • Switch to ground
  • 0 to 100% 60 to 5000 Hz
  • 60 to 10 000 Hz
SAE J1939:
  • PGNs 61440 to 65535
Current control:
  • 0 to 2000 mA
PWM control:
  • 0 to 100% Duty cycle
PWM frequency range:
  • 40 to 400 Hz
EFDR-0201A_Config(2022-02-24) EFDR-0201A_Config2(2022-02-24)
EFDR-0201A_Dim(2022-02-24) EFDR-0201A_Wiring(2022-02-24) Valve_Driver_Installed(2022-02-24)

Dual Valve Driver Model EFDR-0201A: Part No. 4204710

Configuration Software for EFDR-0101A — HF-Impulse: Free download from www.hydraforce.com/electronics.

Mating Connector Kit: Part No. 4001955

Test Harness: Part No. 4000304 (For testing and bench operation)

USB-CAN Programming Adapter: Kvaser Leaf Lite HS — Part No. 4000371, also available from www.kvaser.com

Temperature Sensor — ERT 120: Part No. 4206200

Mating Connector Kit for ERT 120 Temperature Sensor — Deutsch Model DTM06-2S: Part No. 4001970

Conversion Harness - to convert from EFDR1: Part No. 4000426

For remote mounting, use connectors: DT04-2P (Part No. 4001958) and DT06-2S (Part No. 4001417)