The transformer is part of the operator’s internal power system and is responsible for:

 Main functions

• Steps down 230V AC mains power
• Supplies low-voltage power (24V DC control system)
• Feeds:
  • Control PCB
  • Sensors (limits, safety inputs)
  • Accessories (push button, receiver, etc.)
• Supports battery backup charging system (if fitted)

Electrical architecture (how it works)

From Dortech DorRoller 45 system specs:

• Supply input: 230V AC
• Control system: 24V DC logic

Power flow:

Output characteristics (real system values)

Although Dortech doesn’t publish the transformer itself, the system it supports defines it:

Control voltage

• 24V DC system

Battery backup (related subsystem)

• Optional 24V 3.5Ah battery backup

 This confirms the transformer/PSU must:

• Supply stable 24V DC rail
• Support charging circuit when battery is installed

Role in the system

The transformer is not just power conversion — it is part of the safety logic supply.

It powers:

• Control board (logic brain)
• Limit detection system
• Obstacle sensing system
• Remote receiver module
• LED / status indicators

Typical technical characteristics (industry standard)

For this class of 230V garage operators, the transformer/PSU typically includes:

Input

• 220–240V AC, 50Hz

Output

• 24V DC regulated (main rail)
• Sometimes auxiliary low-voltage tap (12V for accessories)

Power rating

• Typically 40VA – 100VA equivalent system load

Type

• Internal step-down transformer + rectifier + regulator
  • Often PCB-mounted (not a standalone block)

Protection functions

The transformer/power section usually includes:

• Thermal protection (overheating shutdown)
• Fuse protection (input or PCB fuse)
• Surge suppression
• Overload protection via control board

Why it matters in the Dor Roller 45

If this section fails:

Symptoms

• No power to control panel
• Door completely dead
• No LED indicators
• No response from push button or remote

But motor may still be fine

 This is one of the most common “whole system dead” faults.

Physical location

Inside the Dor Roller 45 unit:

• Mounted on or near the control PCB housing
• Not externally visible
• Connected to:
  • Mains input terminals
  • Control board power rail
  • Battery charging circuit (if installed)

Key specs summary

•  Type: Internal step-down transformer / PSU module
•  Input: 230V AC
•  Output: 24V DC control system
•  Function: Powers + controls entire logic system
•  Integrated with: PCB + charging circuit
•  Used in: DorRoller 45 roll-up operator system

Important clarification

This is not a replaceable “plug-in transformer unit” in most cases.

In real-world servicing:

• It is usually replaced as part of:
  • Control PCB assembly
  • Or full power module board

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