This is the main brain of the entire DorRoller 45 system — and unlike many of the other parts, it’s a complex, multi-function electronic controller, not just a simple board.

It controls:

• Motor operation
• Limits (via RPM system)
• Safety features
• Remote controls
• Accessories

From official specs:

• System uses 24V DC control voltage

Core functions

Motor control

• Sends power to motor (open/close direction)
• Controls:
  • Start
  • Stop
  • Reverse

Limit control (electronic)

• Works with RPM limit assembly
• Stores:
  • Open position
  • Close position
• Stops motor at correct points

Safety management

• Obstacle detection (force/RPM based)
• Auto-reverse if obstruction detected
• Safety cut-out logic

From system features:

• “Obstacle sensing feature”

Input processing

Handles signals from:

• Push button
• Remote receiver (433 MHz rolling code)
• Safety devices (photocells, etc.)

Output control

Controls:

• Motor relays / drivers
• Courtesy LED light
• External accessories

Power regulation

• Receives low voltage from transformer
• Regulates:
  • Logic voltage
  • Sensor supply

Electrical specifications

Based on DorRoller 45 system:

• Input (from PSU): 24V DC
• Mains supply (system level): 230V AC
• Radio frequency: 433 MHz rolling code

 The PCB sits between:

• High-voltage input (via PSU/transformer)
• Low-voltage control system

Key components on the PCB

A typical DorRoller control board includes:

Microcontroller (CPU)

• Executes all logic
• Stores programmed limits

Motor driver section

• Relays or transistor drivers
• Controls direction and power

Power supply section

• Voltage regulators
• Filtering capacitors

Receiver module (often onboard)

• 433 MHz radio receiver
• Handles remote signals

Input terminals

• Push button
• Safety devices
• Limit/RPM sensor

Output terminals

• Motor
• Light
• Accessories

How it controls the door

Everything loops through the PCB.

Smart features controlled by the PCB

From DorRoller 45 features:

• Soft start / soft stop
• Accurate electronic limits
• Obstacle sensing
• Auto-close (if enabled)
• LED courtesy lighting

 All of these are purely PCB-controlled functions.

Common PCB failure symptoms

Total failure

•  No LEDs
•  No response at all
   Could be:
• PCB dead
• Or power supply issue

Partial failure

• Door moves but:
  • Doesn’t stop correctly
  • Reverses randomly
  • Ignores remotes

Input/output faults

• Push button works but remote doesn’t
• Motor clicks but doesn’t run

Replacement reality

 This is a model-specific board

• Not interchangeable with:
  • Econo systems
  • Other brands

Replacement options:

• Original Dortech PCB
• Exact compatible DorRoller board

 Generic boards usually won’t work properly due to:

• RPM limit integration
• Software programming

(The Company reserves the right to amend product specifications and information without notice.)