Technical documentation - W.E.ST. Elektronik GmbH

General description
W.E.ST. Elektronik GmbH
This module is used for the control of proportional valves with one or two solenoids (directional valves).
Various adjustable parameters enable an optimized adaptation to the respective valve.
The dynamic integrated power amplifier with a control/cycle time of 0,167 ms is inexpensive and a spacesaving
solution.
The power amplifier is controlled by an enable input and three switch signals. Therefore 8 demand values
can be activated binary. In case of direct control (non binary) it is par example possible to preset the directions
with two inputs and to switch over between rapid and slow speed with the third input. The output
current is closed loop controlled and therefore independent from the supply voltage and the solenoid resistance.
The current output is observed with regard to cable breakdown and over current (short circuit).
Programmable are ramps, MIN and MAX, DITHER (frequency and amplitude) and PWM frequency.
The adjustment via RS232C is simple and easy, so that a short training period can be guaranteed.
Typical applications: Rapid and slow speed controls and digital selectable set points for pressure and flow
rate values.
Features
• For proportional valves with one or two solenoids
• Three switch inputs for the selection of 8 programmed demand values
• Compact housing
• Digital reproducible adjustments
• Characteristic linearization via 10 XY-points per direction
• Free parametering of ramps, MIN und MAX current, Dither (frequency, amplitude)
and PWM frequency
• Adjustment MIN / MAX in mA
• Current range (per software adaptable): 1 A, 1,6 A and 2,6 A
• Simple and application orientated parameter settings
• Fehler Diagnostik und erweiterte Funktionsüberprüfung
• Failure monitoring
• Adjustments via RS232C interface
Seite 4 von 22 12.03.2008