2224V103-UK 11
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 signal. 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 = Vsupply / Rsolenoid 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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