1. Part Number Definition

• Full formal part number: 3A99163G01G50, commonly shortened to 3A99163G50 in industrial procurement.

• 3A99163: Base SUB8 QAI 8-channel analog input module series for Ovation DCS system.

• G01: Standard variant fixed for 4–20mA DC current input only, no voltage signal support.

• G50: Factory upgraded rugged version with enhanced surge protection, anti-EMI and lightning suppression for harsh power plant environmentsEmerson.

Related model comparison

• 3A99163G01: Standard 8CH 4–20mA AI (non-surge basic version)

• 3A99163G02G50: Universal 8CH AI supporting both 4–20mA and 0~5/10VDC input with G50 reinforced circuit

• 3A99163G05/G05G50: 12-channel fixed 0~5VDC voltage input QAX module

2. Electrical Specifications

• Channel quantity: 8 galvanically isolated analog input channels, exclusively designed for 2-wire 4–20mA field transmitters

• On-board loop power: Built-in 24VDC field loop supply; max single-channel load impedance: 900Ω @ 20mA

• Isolation rating: 1000VAC isolation between field channels and SUB8 backplane bus; G50 adds multi-stage TVS + varistor surge suppression circuitry against transient spike and industrial EMI interference

• Accuracy: ≤0.1% Full Scale (FS); full 8-channel scan cycle ≤3ms

• Onboard diagnostic: Per-channel open-circuit detection, over-range alarm, short-circuit identification, internal hardware self-test; all fault status uploaded to Ovation DPU automatically via Quad-Bus

• Backplane power: Powered by +5VDC & ±12VDC from SUB8 rack backplane; typical power consumption ≈4.3W

• Input restriction: Current-only design, no hardware/software configuration for voltage input signals

3. Mechanical & Environmental Data

• Form factor: Standard plug-in PCB for SUB8 rack, unified dimension: 260mm × 100mm × 25mm, mechanically interchangeable with all SUB8 Q-series I/O modules

• Hot-swap capability: Supports online hot replacement without cutting rack power supply, no interruption to adjacent I/O modules on same backplane

• Operating ambient temperature: -40°C ~ +70°C; storage temperature: -45°C ~ +85°C

• Relative humidity: 5% ~ 95% RH non-condensing; G50 version complies with strict power-industry EMC and CE certification

4. Front Panel LED Indication

• POWER (Green): Illuminates when normal backplane power is supplied

• RUN (Green): Lit for healthy Quad-Bus communication with SUB8 master card (3A99158G01 / 3A99159G03)

• CH1~CH8 indicator: Activated when valid 4–20mA signal is detected on corresponding input channel

• FAULT (Red): Triggered by channel open/overload/short fault or module internal hardware failure

5. Key Features

1. Reinforced anti-surge design exclusive for G50 variant, optimized for coal-fired power, waste incineration plant with severe field electrical interference

2. Compatible with redundant SUB8 master controller for dual-redundant DCS configuration

3. Configurable digital filter and process high/low alarm thresholds via Ovation Developer software tool

6. Typical Application

• Thermal power plant: Collection of flow, pressure, level 4–20mA transmitter signals

• Petrochemical & water treatment: 2-wire instrument analog current signal acquisition

• Waste-to-energy power station: Auxiliary process parameter monitoring

7. Matching SUB8 System Components

• SUB8 Bus Master: 3A99158G01 (standard), 3A99159G03 (redundant)

• DI Module QBI: 3A99160G02

• AO Module QAO: 3A99161G01

• DO Module QBO: 3A99162G01

• 12CH Voltage AI QAX: 3A99163G05 / 3A99163G05G50