XH-M229 Desktop PC ATX Power Supply Transfer Module

XH-M229 Desktop PC ATX Power Supply Transfer Module transforms a conventional ATX power supply into a powerful, multi-channel bench supply for your laboratory or workshop. This robust transfer module allows engineers and hobbyists to access the common DC voltage rails directly from the power supply’s 20/24-pin ATX connector. Consequently, you can reuse inexpensive, high-current PC power supplies for prototyping and circuit testing, saving significant cost compared to dedicated bench supplies. Furthermore, the board incorporates essential protection features, including a main power switch and fuse protection, which safeguards both the connected load and the Power Supply Unit (PSU) itself. Therefore, the XH-M229 provides a safe, versatile, and economical power solution for a wide range of electronic projects.

Key Features:

• Multi-Voltage Output: You can effortlessly access the five primary DC voltages: +3.3V, +5V, +12V, −12V, and +5V Standby.
• ATX Compatibility: The main input header supports both 20-pin and 24-pin standard PC ATX power supply connectors.
• Terminal Blocks and Fuses: The board features color-coded, screw-type terminal blocks for secure connections and replaceable fuses for overcurrent protection on the main rails.
• Power Indicator: An onboard LED indicates the power status, confirming the PSU is actively supplying voltage to the board.
• PSU Switch Control: Integrated tactile switch allows you to power the ATX unit on and off conveniently, mimicking a PC motherboard.

Technical Specifications:

• Input Connector: Standard ATX 20-Pin or 24-Pin Male Header
• Available Output Voltages: +3.3 V, +5 V, +12 V, −12 V, +5 V_SB (Standby)
• Output Interface: Screw Terminal Blocks (Color-Coded)
• Max Current Rating: Limited by the connected ATX PSU (Typically ≥ 10 A on +12 V, ≥ 15 A on +5 V)
• Protection: Replaceable 2 A Fuses on selected rails
• Power-on Control: Integrated momentary switch to short PS_ON (Pin 16) to GND.

Mechanical Specifications:

• Board Material: High-Quality FR-4 Fiberglass PCB
• Color: Typically Blue or Green
• Mounting Holes: Four standard mounting holes facilitate secure installation in enclosures or benches.
• Connections: Screw-type terminal blocks ensure robust, tool-based wire termination.

Dimensions:

• Board Length: ≈ 128 mm
• Board Width: ≈ 48 mm
• Height (Max Component): ≈ 20 mm (due to terminal blocks and ATX header)
• Weight: ≈ 60 g

Pinout and Wiring:

• ATX Connector: Plug your power supply’s main 20/24-pin cable directly into the onboard header.
• Terminal Blocks: Color coding strictly follows the ATX standard: for instance, Yellow for +12 V, Red for +5 V, Orange for +3.3 V, Blue for −12 V, and Black for Ground (GND).
• PS-ON Pin: The board internally handles the necessary shorting of the green PS-ON wire to ground when you activate the power switch.
• Wiring Note: However, always verify the current limits of your connected PSU before drawing heavy loads from the terminal blocks.

Datasheet Reference:

• Download ATX Power Supply Standard Specification

Commonly Used in:

• DIY Bench Power Supplies: Provides a quick and affordable way to build a variable voltage test station.
• Prototyping Labs: Essential for supplying high-current, stable rails for microcontrollers, sensors, and actuators.
• Motor and LED Testing: Easily source the +12 V required for driving DC motors or high-power LED arrays.

Applications:

• Hobbyist Electronics: Powering Arduino, Raspberry Pi, and other single-board computers directly from high-capacity rails.
• Car Audio Testing: The +12 V rail can effectively test car stereos and amplifiers outside of a vehicle.
• Thermal Load Testing: Similarly, use the high-current rails to safely test resistive loads and heating elements.

Equivalent Models:

• ATX Breakout Board (Terminal Block Style): Other generic boards that offer terminal block access but may lack the onboard power switch.
• DPATX Converter: Modules designed for similar functionality but potentially in a different form factor or with different terminal types.
• Self-Wired ATX Connector: In short, any custom solution using only the ATX connector and wiring can replace this module, but the XH-M229 offers superior safety and convenience.

Package Includes:

• 1 x XH-M229 Desktop PC ATX Power Supply Transfer Module