High Country Tek DRF Series - Manual (Page 20)

021-DRF Rev A DRF User Manual 20
Copyright © High Country Tek, Inc. – 2013
DRF
Closed-loop Valve Controller
Application Examples
Open Loop Double Solenoid Control (DRF2-Vxx)
The DRF can drive a dual-coil valve with a joystick or
potentiometer of 10k
Ω.
If enable switch is not used, set channel 1 to be Mode 1,
channel 2 to be Mode 3.
If enable switch is used, set channel 1 to be Mode 2,
channel 2 to be Mode 4.
The minimum and maximum input parameters for the two
channels should not be overlap.
Set the dither and output settings according to the valve
specifications.
Schematic
FUSE
+V Power Input
9 - 32VDC
+V = Enabled
PWR J1-1
DRF2
Electronic Valve
Controller
Enable J1-3
GND J1-2
-10V Ref. Out J4-1
+10VDC @ 20mA
0 to 10VDC
+10V Ref. Out J4-3
Ch. 1 I/P J5-1
Sig GND J4-2
J5-2
V
D
C
I/
P
m
A
I/
P
Supply Voltage
4-12mA
Ch. 2 I/P J5-3
Prop. PWM (Sourcing)
Sig GND J2-2
Ch. 1 Out J2-1
Ch. 2 Out J2-3
Prop. PWM (Sourcing)
0 to -10VDC
12-20mA
Example Settings
Input / Output Diagram
-10V
(Ch. #2)
600mA
5mA
600mA
5mA
Center (0V)
Ch. #2
Current
Ch. #1
Current
10V
(Ch. #1)
Command
Input
-0.2V
(Ch. #2)
0.2V
(Ch. #1)
Parameter Value
C1 Mode 2 CUR USE ENBL
C1 Min input 0.2 V
C1 Max input 10.0 V
C1 Min output 5 mA
C1 Max output 600 mA
C1 Ramp up 1 S
C1 Ramp down 1 S
C2 Mode 4 IN1 USE ENBL
C2 Min input -0.2 V
C2 Max input -10.0 V
C2 Min output 5 mA
C2 Max output 600 mA
C2 Ramp up 1 S
C2 Ramp down 1 S
Dither frequency 150 Hz.