The PQP-171-P hydraulic control unit is a universal pump control module specifically designed for the swashplate control of variable displacement pumps with an integrated power output stage.

The unit is designed for installation within a shielded EMC enclosure (control cabinet) and mounts onto a standard DIN rail. It has an IP20 protection rating.

Scalable analog signals in the range of 0–10 V or 4–20 mA are used for setpoint and actual values. The integrated PWM power output stage controls proportional valves with one or two solenoids and delivers a regulated output current of up to 2.6 A.

Key parameters include the PID control parameters (P, I, D, T1) and the integrator control (I_LIM), as well as the output stage settings such as solenoid current (CURRENT), dither (frequency and amplitude), and the PWM frequency." Coverage compensation MIN.

Parameterization is performed PC-based using the WPC software via the integrated USB interface.

Special features of the device include continuous monitoring for cable breaks and short-circuit protection of the output stage. A digital switching input also allows direct control of the output stage with a fixed value, enabling the pump to be moved to a defined end position independently of setpoint and actual values.