HU-M28 Desktop PC ATX Power Supply Transfer Module

HU-M28 Desktop PC ATX Power Supply Transfer Module turns a standard ATX desktop PSU into a safe, multi-rail bench power source. You connect a 24-pin ATX plug and instantly access regulated +12 V, +5 V, +3.3 V, −12 V, and +5 VSB rails for prototyping, repair, and lab use.

Key Features:

• ATX to Bench Conversion: Adapts a 24-pin ATX PSU to convenient lab outputs.
• Multi-Rail Access: Breaks out +12 V, +5 V, +3.3 V, −12 V, and +5 VSB rails with grounds.
• Onboard Power Switch: Toggles PS_ON control for quick start/stop.
• Status LEDs: Shows rail presence and power-good state at a glance.
• Protection Elements: Includes fuses/polyfuses and screw terminals or binding posts for safer distribution (model dependent).
• Wide Use Cases: Feeds Arduino, LED strips, radios, chargers, and DC projects from a single PSU.

Technical Specifications:

• Input: 24-pin ATX connector from desktop PC power supply.
• Available Rails: +12 V, +5 V, +3.3 V, −12 V, +5 VSB (standby); GND common.
• Output Current: Limited by the connected PSU’s ratings; module-side fuses/polyfuses add additional limits per rail.
• Control: PS_ON latch via onboard switch; optional PWR_OK indication.
• Terminations: Binding posts and/or screw terminals for easy hookup (varies by batch).
• Indicators: LEDs per main rail or global power LED for fast diagnostics.
• Recommended PSU: Any ATX supply with 24-pin main output; 300–750 W typical.
• Operating Temperature: 0 °C to +50 °C ambient (derate by PSU and enclosure airflow).

Mechanical Specifications:

• PCB: FR-4, solder-masked, silkscreened rail labels.
• Hardware: Binding posts/screw terminals, tactile or rocker PS_ON switch.
• Mounting: Four corner holes for standoffs; desktop or enclosure mounting supported.
• Safety: Clear rail markings; observe polarity and fuse ratings during use.

Dimensions:

• Board Size (typ.): ~70 mm × 55 mm × 20 mm including posts and switch.
• Mounting Holes: 4 × M3 holes; ~60 mm × 45 mm approximate hole pattern.
• Connector Spacing: Sized for standard 24-pin ATX socket clearance.

Pinout and Wiring:

• Input: Plug the 24-pin ATX connector into the HU-M28 header.
• ATX Wire Map (for reference): Yellow = +12 V, Red = +5 V, Orange = +3.3 V, Blue = −12 V, Purple = +5 VSB, Black = GND, Green = PS_ON, Gray = PWR_OK.
• Switch Control: The onboard switch pulls PS_ON (green) to GND to start the PSU; switch off to stop.
• Outputs: Use binding posts/screw terminals labeled by rail. Keep returns to GND posts.
• Protection Tips: Add inline fuses for downstream devices; use a flyback diode for inductive loads.

Datasheet Reference:

• Search “HU-M28 ATX power supply transfer module datasheet” for the latest drawings, fuse values, and rail LED mapping from the vendor.
• See “ATX12V Power Supply Design Guide” for official rail definitions and PS_ON/PWR_OK behavior.

Applications:

• Electronics Bench Power: Drive 3.3 V, 5 V, and 12 V projects from a single source.
• LED and Lighting Tests: Power LED strips and drivers with stable rails.
• Hobby RC and Charging: Feed chargers that accept DC input.
• Repair and Diagnostics: Bring-up boards, fans, and peripherals quickly.
• Education Labs: Demonstrate PSU rails, load behavior, and power distribution.

Equivalent Models:

• ATX Bench Power Breakout Board (Generic 24-pin): Similar multi-rail adapter boards.
• R-Geek ATX PSU Breakout Module: Alternative ATX-to-bench solution.
• SparkFun ATX Power Supply Breakout: Branded variant with labeled posts.

Package Includes:

• 1 × HU-M28 Desktop PC ATX Power Supply Transfer Module