High Country Tek DRF Series - Manual (Page 5)

021-DRF Rev A DRF User Manual 5
Copyright © High Country Tek, Inc. – 2013
DRF
Closed-loop Valve Controller
DRF Controllers
The DRF controller drives proportional solenoid valves in a closed loop system to follow a command signal. When
the feedback is greater than the command input, the coil receives full current; when the feedback is less than the
command input, the coil receives 0 current.
Once configured, the settings are permanently stored in the controller memory.
DRF Features
 Easily configured using HCT Graphical User Interface (GUI) or HCT Hand Held Interface (HHI)
 LED indication of power, output current and fault status
 DIN-rail mount housing with removable terminal blocks
 Multiple modes for open loop and closed-loop applications, programmable enable input
 All input and output limits are independently adjustable
 Adjustable output with short circuit protection, adjustable ramp up and ramp down rates
 Fully adjustable PID control loop
Operating Specifications
Supply Voltage 9 to 32VDC
Supply Current Valve current + 50mA (Quiescent Max)
Output Current DRF-x06: 600mA MAX. per channel
DRF-x12: 1.2A MAX. per channel
DRF-x25: 2.5A MAX. per channel
Coil Resistance 2Ω MIN.
Reference Voltages +10V, -10V @ 20mA (DRF-Vxx versions only)
Dither Frequency 30, 50, 75, 100, 125, 150, 175, 200, 225, 250, 275, 300, 1000 Hz
Analog Input Range DRF-Vxx: -10V to 10V DRF-Axx: 0 to 20mA
Analog Input Impedance DRF-Vxx: 38kΩ DRF-Axx: 250Ω
Analog Input Resolution 10 bits
Operating Temperature Range -20º to 70º C; -40º to 85º C (storage)
Enclosure Polyamide
Dimensions Inch: 0.69 W x 4.50 H x 4.30 D; mm: 17.5 W x 114.5 H x 109.4 D