1. Part Code Definition

• 3A99164: Base QAV low-level voltage analog input card family of SUB8 rack

• G02: Low-level mV dedicated version; G01 = ±5~+20mV low voltage, G02 = -12.5~+50mV DC millivolt input range

• Optional rugged surge model: 3A99164G02G50 (enhanced anti-surge/EMC for heavy industry)

• Distinction vs prior DO card 3A99164G01:

  • 3A99164G01: ±5~+20mV QAV AI

  • 3A99164G02: -12.5~+50mV wide-range millivolt QAV AI (not digital output DO)

2. Electrical Specifications

• Channel quantity: 8 isolated low-level analog input channels, millivolt direct input for thermocouple/mV transmitters

• Input range: -12.5mV ~ +50mV DC, input impedance = 500Ω per channel

• Galvanic isolation: 1000VAC isolation between field side and SUB8 backplane bus

• Onboard function: Cold junction compensation reserve circuit for direct TC wiring; no built-in loop 24V power (pure passive mV input)

• Accuracy: ≤0.08% Full Scale; full-module scan cycle ≤3.2ms

• Channel diagnostics: Open input wire detection, over-range alarm, hardware self-test, fault status uploaded to Ovation DPU via Quad-Bus

• Backplane power: +5VDC & ±12VDC from SUB8 rack backplane; typical power draw ≈4.1W

3. Mechanical & Environmental Parameters

• Form factor: Standard SUB8 plug-in PCB, dimension:260×100×25mm, mechanically interchangeable with all SUB8 QAI/QBO/QAO series modules

• Hot-swap: Support online hot-plug replacement without rack power shutdown

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

• Humidity:5%~95%RH non-condensing; G50 variant complies CE & power industry EMC standard

4. Front Panel LED Definition

• POWER(Green): ON when backplane supply normal

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

• CH1~CH8: Channel indicator lights with valid mV signal input

• FAULT(Red): Triggered by open-circuit, overrange or module internal hardware failure

5. Core Features

1. Wide-range millivolt acquisition, directly connect K/S/B/E-type thermocouples without external signal converter

2. G50 suffix version adds multi-stage TVS+varistor surge suppression for power plant furnace temperature measurement

3. Software configurable input filter, engineering unit conversion via Ovation Developer tool

4. Compatible with redundant SUB8 master controller for dual-redundant I/O cabinet configuration

6. Typical Application

• Thermal power plant: Boiler furnace, superheater thermocouple temperature signal collection

• Petrochemical furnace, incinerator kiln thermal monitoring, low mV sensor signal acquisition

7. Matching SUB8 Supporting Parts

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

• 4~20mA AI(QAI):3A99163G01/G01G50

• Digital Input(QBI):3A99160G02

• Analog Output(QAO):3A99161G01

• Solid-State DO(QBO):3A99164G01(DC24V 16CH digital output)