Harmar Summit Wheelchair Lift Speed Control Circuit Board

12/24 V PWM DC motor speed controller board for select Harmar and Summit vertical platform lifts originally equipped with #46103; adjustable 0–100% motor speed control.

This 12/24 V DC PWM motor speed controller board delivers up to 30 A and provides adjustable pulse‑width modulation (PWM) output to control motor speed in compatible vertical platform lift applications replacing #46103. Designed as a direct‑fit board with the same outline and mounting footprint as the original, this controller requires professional configuration of speed parameters by a qualified technician familiar with your specific lift model.

• Input/Load voltage: 12/24 V DC, selectable via jumper
• Maximum continuous current: 30 A DC PWM output load
• Speed control range: 0 %–100 % adjustable PWM duty cycle
• PWM frequency: ~100 Hz for DC motor speed regulation
• Board size: ~3.85″ × 1.59″ × 1.25″ (approx. 100 mm × 40 mm × 30 mm)
• Control type: Potentiometer‑based PWM signal adjustment
• Compatibility: Drop‑in replacement for lifts originally using #46103; fits Harmar & Summit VPLs with that controller board footprint

This product is intended for use by technicians experienced with motor control systems and PWM speed setup; it does not ship pre‑set to a specific speed. Ensure proper selection and calibration are performed in accordance with lift manufacturer parameters.

Installation of this controller board should be performed by qualified service personnel only to maintain compliance with safety standards and to ensure reliable operation in mobility lift systems. Proper installation and setup help uphold safe, consistent performance.