Description

YOKOGAWA AIP121-S00

1. Basic Information

YOKOGAWA AIP121-S00 is a universal high-precision analog input module for CENTUM CS3000 and CENTUM VP DCS systems. It supports multi-type process signal acquisition including current, voltage, thermocouple and RTD signals, and converts field analog parameters such as temperature, pressure, flow and liquid level into standard digital data for DCS control and monitoring.

Equipped with a 16-bit high-resolution AD converter and multi-stage anti-interference processing mechanism, the module features high acquisition accuracy, low temperature drift and strong environmental adaptability. It supports signal filtering, cold junction compensation and wire break detection, realizing long-term stable data collection. Widely used in industrial process monitoring, system renovation and spare part replacement in petrochemical, power and metallurgy industries.

2. Core Technical Specifications

2.1 Signal & Accuracy Parameters

Model: AIP121-S00, Type: Universal High-precision Analog Input Module
Compatible System: YOKOGAWA CENTUM CS3000 / CENTUM VP DCS
Resolution: 16-bit high-precision AD conversion
Current Range: 4～20mA, 0～20mA, -320mA～+320mA
Voltage Range: -10V～+10V, 0～5V
Temperature Sensors: K/J/T/E thermocouple, Pt100/Pt1000 RTD
Signal Processing: Digital filtering, smoothing, linear calibration and cold junction compensation
Diagnosis: Wire break, short circuit and over-range fault detection

2.2 Channel & Functional Features

Channel Design: Isolated multi-channel input, independent signal processing without crosstalk
Configuration: Software configurable signal type, range and filter parameters
Isolation Performance: Electrical isolation between channels and backplane bus
Data Transmission: Real-time high-speed data upload with low delay
Fault Latch: Abnormal data and fault status latch for traceability

2.3 Electrical Parameters

Power Supply: 5VDC backplane bus power supply
Power Consumption: Low power design with low temperature rise
Protection: Overvoltage, overcurrent, surge and ESD protection
Insulation: High-strength electrical isolation to prevent signal interference
Overload Resistance: Short-term signal overload tolerance with automatic recovery

2.4 Environmental & Physical Parameters

Operating Temperature: -40℃～+70℃
Storage Temperature: -40℃～+85℃
Humidity Range: 5%～95%RH (Non-condensing)
EMC Performance: Industrial anti-electromagnetic interference design
Vibration Resistance: Reinforced structure for industrial vibration scenarios
Protection Grade: IP67 dustproof and waterproof
Dimensions: 130mm × 110mm × 22mm
Weight: Approx. 0.5kg
Installation: Standard DCS rack embedded mounting

3. Main Features

Multi-signal Universal Compatibility: Supports current, voltage, thermocouple and RTD signals in one module, reducing spare part types and maintenance costs.
16-bit High-precision Acquisition: Ensures long-term accurate collection of process parameters with low zero drift and temperature drift, meeting high-precision process control requirements.
Strong Anti-interference Capability: Adopts multi-stage filtering and electrical isolation to eliminate field electromagnetic interference, signal jitter and sudden jump values.
Full Self-diagnosis & Alarm: Real-time detection of wire break, short circuit and hardware faults, with complete fault code logging for rapid troubleshooting.
Flexible Software Configuration: Supports online parameter modification such as signal range and filter coefficient without hardware replacement.
Long-term Stable Operation: Wide-temperature industrial design adapts to 7×24-hour uninterrupted operation of continuous production processes.

4. Working Principle

Power-on Initialization & Self-test: The module completes hardware self-inspection and parameter initialization after power-on, and automatically joins the DCS system bus topology.
Field Analog Signal Acquisition: Collects analog signals from field transmitters and sensors, and performs isolation and anti-interference filtering through front-end circuits.
High-precision AD Conversion: Converts analog signals into standard digital signals via 16-bit AD converter, with linear correction, cold junction compensation and zero calibration.
Digital Filtering & Stabilization: Eliminates interference noise and abnormal jump values through algorithm processing to output stable and accurate process data.
Real-time Fault Diagnosis: Monitors signal loop status, identifies wire break, short circuit and over-range faults, and triggers alarm and status latch.
Data Upload & Interaction: Transmits processed standard process data and module operating status to DCS controller and HMI for process control, trend recording and monitoring.

5. Application Scenarios

5.1 Process Industry Parameter Acquisition

Collects temperature, pressure, flow and liquid level parameters of reactors, distillation towers and heating furnaces in petrochemical and chemical plants to support closed-loop regulation and interlock control.

5.2 Power Industry Automatic Monitoring

Applied in thermal power and cogeneration DCS systems for real-time signal collection of boilers, turbines and auxiliary equipment to ensure stable operation of power units.

5.3 Mixed Multi-sensor Measurement

Solves mixed signal collection scenarios of thermocouples, RTDs and transmitters, simplifies hardware configuration and reduces on-site wiring complexity.

5.4 Legacy DCS System Spare Replacement

Directly replaces aging and faulty analog input modules without modifying wiring and configuration, quickly restoring system acquisition accuracy and stability.

5.5 Process Expansion & Renovation

Quickly expands analog measurement points for process upgrading and equipment renovation, realizing low-cost system function expansion.