Controller Block Diagram - Denison Hydraulics 9-UK-22071-C Manual

Multi-Function Proportional Valve Dual Driver ( Encapsulated )

Controller Block Diagram:

+12V / 24V Valve
2
Supply Input
+12V / 24V Power Supply Input 1
0V Supply Input
3
System 'Earth' Input 4
+5V (+/-5%) @ 5mA User Output
5
-5V (+/-5%) @ 5mA User Output
6
Command Signal Input
7
0V Command Signal Input
8
Link 'S1' = +/- 0 TO 20mA Input
NO LINK = +/- 0 to 5V DC Input
Link 'S3' = +/- 0 to 10V DC Input
Notes:-
1) Positive polarity (+) command ALWAYS controls output 'A'.
2) Negative polarity (-) command ALWAYS controls output 'B'.
3) Reduced supply voltage will result in a reduced output availability to the coil being controlled due to
circuit losses. To achieve maximum coil current ( if required for maximum pressure or flow ) ,
ensure that the supply voltage is at the upper supply limit as shown below:-
For 12V coils, use 12V +20% ( Approx. 13.8 – 14VDC )
For 24V coils, use 24V +20% ( Approx. 28 – 32VDC )
Heavy Current
Supply to
Output Stages
Input
Supply
protection
+/- Voltage
reference
generators
+/-V Input
Conditioning
Circuits
Ramp UP
Ramp Down
Generator
Ramp Ramp
UP DOWN
Link 'F1' = 100Hz
Link 'F2' = 140Hz
Link 'F3' = 250Hz
Dither
To Output
Frequency
Stages 'A' & 'B'
Generator
Link 'A1' = 12V@800mA
Link 'A2' = 24V@500mA
Link 'A3' = 12V@2700mA
Link 'A4' = 24V@1700mA
I Min 'A'
MosFet
Output
Stage 'A'
I Max 'A'
Current
Feedback
Link 'B1' = 12V@800mA
Link 'B2' = 24V@500mA
Link 'B3' = 12V@2700mA
Link 'B4' = 24V@1700mA
I Min 'B'
MosFet
Output
Stage 'B'
I Max 'B'
Current
Feedback
11
Valve Coil
Connections
12
9
Valve Coil
Connections
10
8