TECHNICAL DESCRIPTION
• To prevent programming during operation, two safety measures have been
included: The correct password (030) must be entered in menu [PAS], and
the output must give no signal (000 must be displayed). This is achieved by
disconnecting +Vsupply on terminal 3.
• The 2224 Valve Controller can be controlled by a joystick / potentiometer
using the internal +10 V and -10 V supply, or a process current / voltage sig-
nal. For process signals the differential amplifier (DP1 switch 6 off) will reduce
disturbances from noisy signals. Joysticks / potentiometers are connected
single-ended (grounded), and it is possible to connect a 10 kΩ load resistor
(DP1 switch 5 on), providing a minimum potentiometer load current.
• A switch between A and B valves can be made in two ways. By way of
function 1, the A valve is chosen when +Vsupply is applied to terminal 2.
By way of function 2, changes between A/B valves are made automatically
according to the value of the input signal (no signal on terminal 2). Input:
0...50% = A valve 100...0%. Input: 50...100% = B valve 0...100%.
• When connecting the output to a solenoid please ensure that the peak
valve current = V
supply
/ R
solenoid
does not exceed 7A.
• A deadband can be programmed to avoid unintentional activation of the
valve in connection with e.g. an inaccurate neutral position of joysticks. The
deadband introduces a threshold which must be exceeded before any output
activity will take place.
• The spring response (bias) can be adjusted to account for the valve seat
travel before oil flow.
• Two current limits can be programmed (Imax1 & Imax2) for limit stop detection
featuring slow motion before stop. The active current limit (Imax1 & Imax2) is
selected by the PNP input signal on terminal 7.
• The 2224 Valve Controller complies with EMC data only when shielded
cabling is used and the shield is connected to supply ground.
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WIRING DIAGRAMS FOR
DC VOLTAGE INPUT
Double valve control (A/B
valves) from a 0...1 VDC
input signal.
DIP-switch programming:
Function 1 or
Function 2.
Single valve control from
a 0...1 VDC input signal.
DIP-switch programming:
Function 1.
Double valve control (A/B
valves) from a -10...+10
VDC input signal.
DIP-switch programming:
Function 1 or
Function 2.
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