Mitsubishi Accessible Button Expansion Board DC309A105G01

Mitsubishi Accessible Button Expansion Board DC309A105G01 is used in Mitsubishi elevator button command and accessible instruction expansion applications.

This board is usually related to elevator push-button signal expansion, disabled-access instruction input, or additional command signal processing inside the elevator operating panel system. In the elevator spare parts market, it may also be searched as:

• Mitsubishi Elevator Accessible Button Expansion Board
• Mitsubishi Disabled Instruction Expansion Board
• Mitsubishi Elevator Button PCB Board
• Mitsubishi Elevator Expansion Board
• Mitsubishi Push Button Command Board
• Mitsubishi Elevator PCB Board

The main model reference for this page is:

• DC309A105G01

Related market reference:

• DC309B106

DC309A105G01 and DC309B106 often appear together in supplier listings for Mitsubishi elevator expansion board applications. These references are useful for product search and quotation confirmation, but the final replacement should still be checked by the old board label, connector layout, and panel configuration.

Application in Elevator Button Systems

This board should be understood as a button command expansion PCB, not a single push button.

It may be used when the elevator operating panel needs additional button signal handling, accessible operation input, or disabled instruction command support. Depending on the elevator configuration, the board may be installed near the car operating panel, accessible button panel, or related command input area.

Maintenance teams may check this board when there are issues such as:

• accessible button signal not responding
• disabled instruction input abnormality
• button command expansion failure
• partial push-button response problem
• intermittent command registration
• connector or wiring issue inside the panel
• visible PCB damage

These symptoms may also be caused by the push button itself, wiring harness, connector terminals, power supply, or related COP communication circuit.

Model Confirmation Notes

Before ordering Mitsubishi Accessible Button Expansion Board DC309A105G01, please confirm:

• Complete DC309A105G01 marking on the old board
• Whether DC309B106 appears on the board or system document
• Front and back photos of the PCB
• Connector quantity and direction
• Installation position inside the operating panel
• Old button panel photo if available
• Existing button or instruction signal fault description

If the old label is unclear, a full photo of the panel interior and close-up photos of the PCB marking can help confirm the correct replacement faster.

Replacement Notes

Do not select this board only by appearance.

Mitsubishi elevator expansion boards may look similar, but the supported button quantity, signal definition, connector layout, and board version may be different. Before installation, technicians should compare the old and new PCB carefully and check the button harness, connector oxidation, power supply condition, and related control circuit.

For overseas buyers, sending clear photos of the original DC309A105G01 / DC309B106 board before shipment is the safest way to reduce wrong supply.