PA 200 control module for Bruni agricultural brushcutter arm

Typical Defects:
The brushcutter arm does not move
Difficulty issuing commands proportionally and accurately
The arm moves jerkily

The UNIFY controller identified by OE code BP61220014 is the control module dedicated to Bruni brushcutter arms configured with electro-proportional in-cab control, usually with a joystick and button panel. Its function is to convert the operator's commands into modulatable commands to drive the hydraulic units of the arm and the cutting head, allowing progressive adjustments and fine maneuvers.

In this type of application the controller is not a simple switch: it manages enablement logic, priorities, ramp-up/ramp-down and, often, a PWM output to proportional solenoid valves so as to make movements smoother, repeatable and safer.

Technical characteristics

• Typical architecture for electro-proportional control in mobile hydraulics (joystick + button inputs, outputs for proportional solenoid valves and ON/OFF utilities).
• Typical power supply from vehicle/machine 12/24 V.
• Driving proportional solenoid valves with PWM modulation.

DIPA can act to overhaul these components thanks to its experience and expertise.

Functions

• Progressive control of the main arm movements (lift/lower, slewing, outreach, tilts) depending on the hydraulic setup.
• Control of the cutting head (activation, possible variation/control of auxiliary functions).
• Safety logic: operator consent, emergency stop, movement lock in the absence of enablement.
• Interference filters and command stabilization (reduction of jerks/sticking caused by electrical disturbances or involuntary micro-movements of the joystick).

Model applications

The controller is associated with Bruni machines that use electric proportional control with the PA 200 joystick as an option for brushcutter arms. In practice it is found on configurations intended for green maintenance and roadside verges, where precise and modulatable movements of the arm and head are required.

Typical faults

• The brushcutter arm does not move
• Difficulty issuing commands proportionally and accurately
• The arm moves in jerks

Final conclusions

The UNIFY controller OE BP61220014 is a key component for Bruni brushcutter arms with electro-proportional control: it enables modulatable movements and finer, safer handling of the arm and head compared to purely mechanical controls.

DIPA has a wide range of spare parts dedicated to the Agri world: from those relating to vehicles to those for auxiliary equipment. Moreover, it offers reconditioned components with like-new performance that can save on replacements while contributing to environmental protection through the circular economy. If the spare part you need is not available, don't worry: DIPA can recondition your part "on demand", restoring full functionality and safety in a short time.