3A99165G04G52 Servo Amplifier Card_Ningde Androld Automation Equipment Co.,Ltd.

June 05, 2026

3A99165G04G52 Servo Amplifier Card

3A99165G04G52 is a factory custom variant based on standard 3A99165G04 servo amplifier PCB; fully pin-to-pin interchangeable with G01/G02/G03/G04 standard versions for direct cabinet replacement without rewiring field cables.

Description

1. Product Introduction

This customized G52 edition is optimized specifically for high-vibration, strong EMI thermal/nuclear power unit DEH hydraulic control cabinet: it receives ±10VDC analog/PWM valve position command signals from 3A99164G50 main control card, converts control signal into adjustable constant drive current to actuate EH hydraulic servo solenoid coils; meanwhile acquires multi-channel LVDT displacement feedback signals to realize full closed-loop position regulation of turbine main stop valve and governing valve.

Compared with standard G04: G52 upgrades internal surge suppression circuit, strengthens PCB three-proof coating and filter network, modifies output current matching parameter for large-stroke high-power servo valves commonly used in large-capacity turbine units.

2. Electrical Specifications

Backplane power input: +5VDC, ±12VDC, powered by rack 3A99132 series PCPS power supply module
Command input: ±10VDC analog signal / PWM pulse-width modulation signal from upper master control board
Rated output drive current: 0~±42mA adjustable constant current (G52 custom upgrade from standard 40mA, adapts heavy-load servo coils)
Feedback interface: multi-group AC small-signal input for LVDT valve position transducer wiring
Onboard configuration: independent channel short-circuit protection fuse, enhanced EMC RC filter, precision gain trim potentiometer for on-site closed-loop loop calibration, overheat & overcurrent lockout protection circuit

3. Environmental & Mechanical Specs

Operating temp inside control cabinet: -10℃ ~ +68℃; storage temperature: -40℃ ~ +85℃
Working humidity: 5%~95%RH non-condensing; full PCB with upgraded anti-corrosion three-proof paint per G52 customization standard
EMC compliance: IEC61000 industrial power anti-interference standard, reinforced against inverter/contactor high-frequency interference
Dimension: standard Ovation single-width Eurocard slot size, same mounting outline as all G-series 3A99165 cards

4. Front Panel Indication & Installation Feature

Front panel equipped with dedicated LED indicators: power supply OK, input signal fault, output overcurrent overload, LVDT feedback failure separately; reserved test pin terminals for multimeter field debugging and closed-loop parameter tuning.

Support hot-swap maintenance under cabinet standby status without full rack power cut; critical governing loops generally adopt dual redundant G52 card configuration to guarantee uninterrupted servo control.

5. Supply Status & Common Troubleshooting

Original OEM new production discontinued; available stock includes fully bench-tested refurbished modules and surplus original spare parts with standard 12-month factory warranty.

No drive output: blown onboard channel fuse or damaged post-stage power drive chip
Valve hunting/oscillation: aging filter capacitors or drift of gain potentiometer setting value
Slow valve position drift: deteriorated LVDT pre-amplifier circuit or poor contact of PCB gold finger pins

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