1. Product Basic Info

2. Core Function Definition

1. Primary power management & closed-loop voltage regulation to generate +5VDC, ±12VDC regulated power for Q-Line VME backplane;

2. Overvoltage/undervoltage/overcurrent/short-circuit protection logic for full crate I/O modules;

3. AC-DC auxiliary sampling & fault diagnostic circuit, feeds power failure alarm signal to DPU main controller;

4. Temperature monitoring for internal power transformer and power semiconductor components, triggers overheat protection automatically.

3. Electrical Specifications

Input Side (From Main Power Supply 5D32191G01)

• AC Input Range: 85~264VAC, 47~63Hz universal industrial input

Regulated DC Output (To VME Backplane)

• Output precision: ±1% full load regulation; Ripple ≤20mVpp

Protection Specifications

• OVP: +5V＞5.7V / ±12V＞14.5V auto shut down

• OCP: Current exceed 120% rated value → hiccup mode protection

• OTP: Internal temp＞85℃ cut off output power

4. Environmental Parameters

• Operating Temp: 0℃ ~ +55℃ (inside sealed control cabinet)

• Storage Temp: -40℃ ~ +85℃

• Ambient Humidity: 5%~95%RH non-condensing, no corrosive gas, no conductive dust

• EMC: Built-in multi-stage EMI filter, compliant with CE industrial control standard for power plant EH cabinet environment

5. Installation & Replacement Instruction

1. The board is plug-in fixed inside 4MDPS9/5D32191G01 power chassis; cut off cabinet AC input before disassembling;

2. Direct drop-in replacement for same G01 revision variant; no parameter modification required after replacement;

3. After replacement: Power on no-load first, measure +5V/±12V output voltage via test terminals before loading full rack I/O cards.

6. Application Scope

7. Commercial & Maintenance Info

• OEM original production permanently discontinued; available stock: fully tested refurbished PCB & inspected used original spare parts;

• Standard repair cycle: 2~4 weeks, rush emergency maintenance service available; global shipping via DHL/UPS/FedEx.

8. Common Troubleshooting

1. Full rack module no power: Check AC input of main power chassis, inspect fuse on 3A99116G01 PCB;

2. Output voltage drift: Replace aging sampling resistors or voltage reference chip on MDPS board;

3. Random power shutdown: Abnormal internal temperature → clean chassis dust or check cooling ventilation of power cabinet.