The YOKOGAWA AAI141-H50 is a high-performance analog input module developed by Yokogawa Electric Corporation, specifically designed for industrial automation systems such as Distributed Control Systems (DCS) or Programmable Logic Controllers (PLC). Its core function is to accurately collect and convert analog signals (e.g., temperature, pressure, flow) from on-site sensors or transmitters into digital signals, enabling processing and control by upper-level controllers. It is widely used in process industries requiring high precision and reliability. Below is its comprehensive specification:
- Brand: YOKOGAWA (Yokogawa Electric Corporation)
- Model Number: AAI141-H50
- Product Type: Industrial-grade analog input module (for DCS/PLC signal acquisition)
- Compatibility: Primarily compatible with Yokogawa’s CENTUM VP DCS system (a mainstream process control platform); can also be integrated with other industrial control systems via standard communication interfaces (with appropriate configuration).
- Packaging & Unit: Sold as a single unit (1 unit per package); includes necessary mounting accessories (e.g., guide rails, terminal blocks).
- Dimensions: Approximately 111 mm (length) × 150 mm (width) × 80 mm (height) (varies slightly by mounting type; designed for standard 35 mm DIN rail mounting).
- Weight: Approximately 2 kg (includes housing and internal electronic components; lightweight for easy installation in control cabinets).
- Operating Temperature Range: -20°C to 70°C (suitable for harsh industrial environments such as chemical plants, power stations, and metallurgical workshops).
- Storage Temperature Range: -40°C to 85°C (safe for transportation and long-term storage in unheated/uncooled warehouses).
- Relative Humidity: 5% – 95% RH (non-condensing; resistant to humid conditions in water treatment plants or coastal industrial sites).
- Protection Class: IP20 (requires installation in a control cabinet with IP20+ protection; prevents dust accumulation and accidental contact with live parts).
- Electromagnetic Compatibility (EMC): Complies with IEC 61000-6-2 (industrial environment immunity) and IEC 61000-6-4 (EMC emissions); resists interference from on-site equipment such as motors, inverters, and high-voltage cables.
- Multi-Signal Compatibility: A single module supports thermocouples, RTDs, current, and voltage signals, eliminating the need for multiple dedicated modules—reducing system cost and cabinet space.
- Independent Channel Configuration: Each of the 16 channels can be set to different signal types via software (Yokogawa’s CENTUM VP Engineering Tool); no hardware rewiring is required, simplifying on-site debugging.
- High Reliability: Industrial-grade components and 1500Vrms isolation design ensure stable operation in harsh environments (e.g., voltage fluctuations, electromagnetic interference) with a mean time between failures (MTBF) of over 100,000 hours.
- Easy Maintenance: Modular design allows hot swapping (when supported by the DCS system)—the module can be replaced without shutting down the entire system, minimizing downtime.
- Diagnostic Functions: Built-in self-diagnosis (e.g., open-circuit detection for thermocouples/RTDs, over-range detection for current/voltage signals) and fault alarms (transmitted to the DCS for real-time alerts), enabling quick troubleshooting.
- Petrochemical Industry: Collects signals from temperature transmitters (reactor temperature), pressure transmitters (pipeline pressure), and flow meters (crude oil flow) in refineries or chemical plants, supporting process control and safety monitoring.
- Power Generation: Acquires data from RTDs (generator stator temperature), current transmitters (turbine current), and voltage sensors (transformer output voltage) in thermal power plants or nuclear power auxiliary systems.
- Metallurgy Industry: Monitors temperature signals from thermocouples in blast furnaces (steel mills) and pressure signals from air compressors, ensuring stable production processes.
- Water Treatment & Environmental Monitoring: Collects analog signals from pH sensors, dissolved oxygen transmitters, and turbidity meters in wastewater treatment plants, enabling automated water quality control.
- Pharmaceutical & Food Industry: Acquires temperature and pressure signals from fermentation tanks (pharmaceuticals) or sterilization equipment (food processing), complying with GMP (Good Manufacturing Practice) requirements for precision and traceability.
- Software Configuration: Requires Yokogawa’s dedicated engineering software (e.g., CENTUM VP Engineering) for channel parameter setting (signal type, range, alarm thresholds); ensure software version compatibility with the module.
- Wiring Requirements: Use shielded cables for signal wiring to reduce electromagnetic interference; follow Yokogawa’s wiring diagram for correct connection (e.g., distinguishing between positive/negative terminals for current signals).
- Calibration: Regular calibration (annually recommended) using standard signal generators or calibration equipment to maintain measurement accuracy, especially for critical applications (e.g., pharmaceutical process control).
For the latest firmware updates, detailed wiring diagrams, or compatibility lists with specific DCS versions, refer to Yokogawa’s official AAI141-H50 technical manual or contact Yokogawa’s industrial automation support team.
