1. Overview
This module adopts standard plug-in structure compatible with universal Ovation control rack backplanes. It acquires 4–20mA DC or voltage analog signals from pressure, temperature, flow and level field transmitters, eliminates high-frequency noise and ground loop interference via built-in signal conditioning circuits, and converts analog measurements into digital data accessible to the main controller. Each module undergoes full factory aging testing and precise signal calibration to guarantee measurement accuracy and long-term drift stability. Redundant deployment avoids single-point signal acquisition failure and ensures uninterrupted monitoring of critical process parameters.
2. Core Functional Features
2.1 Fixed 3 Independent Isolated Analog Input Channels
The suffix -3 corresponds to 3 physically isolated input channels preset at the factory with unified wiring specifications. Channels operate independently without mutual crosstalk, facilitating standardized cabinet wiring, unified spare parts stock management and rapid on-site replacement.
2.2 Professional Analog Signal Conditioning
Supports standard industrial analog input signals including 4–20mA current signal and 0–5V/0–10V voltage signal. Built-in low-pass filtering suppresses high-frequency electromagnetic interference; programmable signal amplification ensures consistent measurement precision across different sensor ranges.
2.3 Channel-by-Channel Galvanic Isolation
Each input channel is electrically isolated from the internal backplane circuit, effectively blocking ground potential difference interference caused by long field signal cables and avoiding measurement distortion in strong interference industrial environments.
2.4 Hot-Swap & Redundant Operation Support
Online hot swapping is available while the DCS system runs normally; maintenance replacement will not interrupt the acquisition of critical process measurement signals. Dual-module redundant arrangement enables seamless signal backup without disturbing on-site control loops.
2.5 Full Onboard Self-Diagnosis
Real-time detection of open circuit, short circuit, over-range signal and internal power supply abnormality for each channel. Fault codes and alarm information are uploaded remotely to the Ovation operator workstation, while front panel LEDs provide local visual status prompts for fast troubleshooting.
2.6 Seamless System Compatibility
Fully compatible with full series Ovation DPUs and standard rack backplanes; no additional adapter boards or cabinet modifications are needed during installation, applicable to new project construction and spare part replacement for old unit retrofits.
3. Key Technical Specifications
Mounting Mode: Standard Ovation rack plug-in installation
Channel Count: 3 isolated analog input channels
Supported Signals: 4–20mA DC, 0–5V DC, 0–10V DC
Power Supply: DC power supplied by rack backplane, no external auxiliary wiring required
Isolation Mode: Galvanic isolation per channel
Operating Temperature: 0 ℃ ~ +60 ℃
Storage & Transportation Temperature: −40 ℃ ~ +85 ℃
Relative Humidity: ≤95% RH, non-condensing
EMC Compliance: Meets industrial G3 anti-corrosion standard and power plant cabinet anti-interference requirements
4. Front Panel LED Indicator Definition
PWR (Green LED): Steady ON = module internal power supply normal; OFF = power loss or blown internal fuse
CH ACT (Green LED): Flashes when the corresponding channel collects valid analog signals normally
COMM (Green LED): Blinking = normal data exchange with local DPU and backplane bus
FAULT (Red LED): Illuminates on channel open/short circuit, signal overrange or hardware damage; fault status is latched for maintenance confirmation
5. Application Scope
Thermal Power Plants
Collect temperature, pressure, flow and liquid level analog signals from boiler, turbine and generator auxiliary systems for real-time process monitoring and closed-loop regulation.
Petrochemical Industry
Acquire analog measurement data from reactors, fractionators and pipeline conveying systems to support continuous process adjustment and safety monitoring.
Metallurgy, Waste Incineration Power Plants & District Heating Stations
Realize stable collection of key process analog parameters, supporting long-cycle unattended automatic operation of production lines.
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