1. Part Number Explanation

• 3A99164: QAV low-level analog input product line for Ovation SUB8 I/O rack

• G03: Dedicated 8-channel RTD resistance temperature detector input version

• Optional reinforced model: 3A99164G03G50: Factory upgraded version with enhanced surge and EMC protection for harsh industrial environments

• G01: Narrow-range millivolt input for thermocouple (-5~+20mV)

• G02: Wide-range millivolt input for thermocouple (-12.5~+50mV)

• G03: Specialized RTD platinum resistance temperature input

2. Electrical Specifications

• Channel configuration: 8 galvanically isolated RTD input channels; software configurable for 3-wire or 4-wire RTD connection

• Supported sensors: PT100, PT500, Cu50 resistance temperature detectors

• Measuring resistance range: 0 ~ 400Ω; corresponding measuring temperature range: -200℃ ~ +850℃

• Onboard excitation: Fixed 0.8mA constant excitation current per channel

• Galvanic isolation: 1000VAC isolation between field circuit and internal Quad-Bus backplane

• Measurement accuracy: ≤0.07% Full Scale; full-channel scan cycle ≤3.0ms

• Built-in diagnostic: Open wire detection, short-circuit alarm, over-range resistance identification and module self-diagnosis; all fault signals transmitted to DPU via SUB8 Quad-Bus

• Backplane power supply: Powered by +5VDC and ±12VDC from SUB8 rack backplane; typical power consumption ≈4.2W

3. Mechanical & Environmental Specifications

• Form factor: Standard hot-swappable plug-in module for SUB8 rack; dimension: 260mm×100mm×25mm, fully interchangeable with all Q-series SUB8 I/O cards

• Hot-swap capability: Online module replacement without rack power shutdown

• Operating temperature: -40℃ ~ +70℃; storage temperature: -45℃ ~ +85℃

• Ambient humidity: 5%~95%RH non-condensing; G50 variant complies with CE and power plant EMC standards

4. Front Panel LED Indicators

• POWER (Green): Illuminated when backplane power is normal

• RUN (Green): Lit during healthy Quad-Bus communication with SUB8 master card (3A99158G02 / 3A99159G03)

• CH1~CH8: Individual LED turns on when valid RTD signal is detected

• FAULT (Red): Activated for open circuit, short circuit or onboard hardware malfunction

5. Key Features

1. Supports both 3-wire and 4-wire RTD wiring to eliminate line resistance measuring error.

2. G50 customized version is equipped with multi-stage surge suppression components to resist surge interference from power plant and petrochemical field.

3. User configurable temperature range, digital filter and alarming parameters via Ovation Developer configuration software.

4. Fully compatible with redundant SUB8 bus architecture matched with dual redundant master cards.

6. Typical Application

• Thermal power plant: Boiler wall temperature, air preheater and flue gas temperature acquisition via PT100 RTD

• Petrochemical industry: Reactor, pipeline medium temperature monitoring

• Waste incineration and water treatment equipment temperature measurement

7. Matching SUB8 Series Components

• SUB8 Bus Master: 3A99158G02, 3A99159G03

• DI Module(QBI):3A99160G02

• 4–20mA AI Module(QAI):3A99163G01G50

• AO Module(QAO):3A99161G01

• Solid-state DO(QBO):3A99162G01