W.E.S.T. Elektronik POS-123-P, Technical Documentation Manual

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Page 41 of 58 POS-123-*-2030 23.08.2019
7 ADDITIONAL INFORMATION: Power output stage
7.1 General function
The power output stages have been developed for controlling proportional valves without spool position
feedback. The output stage is controlled by the microcontroller on the basic module by means of pulse width
modulated signals, and the current is continuously controlled. The cycle time for the controller is 0,125 ms.
The output stage can be ideally adjusted to dynamic requirements via internal parameters.
Valve technology: Proportional valves manufactured by REXROTH, BOSCH, DENISON, EATON, PARKER,
FLUID TEAM, ATOS and others.
Features

Two power output stages with maximum output range of 0.5 A to 2,6 A

Hardware short-circuit protection with 3 µs response time

Adjustable PWM frequency, dither frequency and dither amplitude

High current signal resolution

No additional delay times between the control function and the power stage

Separate power supply for safety-relevant applications

Integrated into the standard controller, no additional wiring necessary

Optimum price/performance ratio