AI-917-00 Yokogawa

AI-917-00 Yokogawa analog module

Product  Description：

Yokogawa Analog Modules are high-precision components designed for the CENTUM Distributed Control System (DCS) and the Stardom network-based control systems. These modules serve as the critical interface between continuous physical process variables and the digital logic of the control system. They are engineered to perform high-resolution Analog-to-Digital (A/D) conversion for inputs coming from field transmitters, as well as Digital-to-Analog (D/A) conversion for outputs driving control valves and actuators, ensuring stable and reliable process automation.

Product Parameters

The technical characteristics of Yokogawa Analog Modules are built around high accuracy, speed, and standard industrial signal compatibility:

• Signal Types: Supports universal standard inputs and outputs, including 4-20mA DC current loops, 1-5V DC voltage ranges, as well as direct connections for Thermocouples (TC) and Resistance Temperature Detectors (RTD).

• Conversion Resolution: Equipped with high-performance converter chips delivering 16-bit resolution to ensure minute process changes are captured accurately.

• Channel Density: Available in flexible configurations, typically offering 8-channel or 16-channel variants per module to balance space and isolation requirements.

• Accuracy Rating: Features high precision with a standard accuracy rating of plus or minus 0.05 percent to 0.1 percent of the full scale, maintaining linearity across the entire operating range.

• Response and Update Time: Provides rapid processing with module update cycles typically between 10 milliseconds and 100 milliseconds depending on the channel configuration.

• Isolation Voltage: Robust galvanic isolation between the field side and the internal system logic, often rated up to 1500V AC or higher to safeguard backplane electronics.

Product Advantages

Yokogawa's analog technology stands out due to its operational intelligence and extreme reliability in high-availability industrial plants:

• Dual-Redundancy Support: Modules can be configured in redundant pairs, allowing for bumpless automatic switchover to the backup module if a fault is detected, ensuring zero interruption to the process.

• Advanced Field Diagnostics: Built-in intelligence enables real-time monitoring for field-side faults, including transmitter loop wire-breaks, short circuits, and out-of-range signal detection.

• Online Maintenance and Hot-Swapping: Modules can be removed and replaced while the control system is powered on and running, significantly lowering the plant's mean time to repair (MTRE).

• Exceptional Noise Filtering: Features sophisticated hardware filters and software averaging algorithms that reject 50Hz and 60Hz power line noise, delivering stable readings in high-interference environments.

• Digital Communication Integration: Many analog modules support HART (Highway Addressable Remote Transducer) protocol pass-through, allowing instrument technicians to perform remote calibration and gather device health data over the existing analog wiring.

Product Applications

These modules are deployed across continuous process industries where precision control directly impacts product quality and safety:

• Refining and Petrochemicals: Monitoring critical temperature and pressure profiles in distillation columns, catalytic crackers, and blending units.

• Oil and Gas Transport: Interfacing with custody transfer flow meters and pipeline pressure transmitters to track product volume and detect leaks.

• Power Generation: Governing the analog output signals sent to steam control valves and fuel feed systems to maintain stable boiler pressure and turbine speed.

• Chemical Processing: Regulating precise chemical dosing loops and monitoring pH or conductivity levels in continuous batch reactors.

• LNG Liquefaction and Storage: Tracking cryogenic temperatures using high-accuracy RTD input modules to ensure safe containment of liquefied natural gas.

Important Precautions

To preserve the accuracy of the analog signals and prevent hardware degradation, the following guidelines must be followed:

• Shielding Layout: Always use shielded twisted-pair (STP) cables for analog signals. The cable shield must be grounded at a single point, typically at the control cabinet side, to avoid creating ground loops that degrade measurement accuracy.

• External Power Separation: Route analog signal cables through dedicated wire ducts separated from high-voltage AC cables and variable frequency drive (VFD) motor leads to prevent electromagnetic noise induction.

• Unused Channel Configuration: Short-circuit the terminals of any unused input channels or configure them as inactive in the system software to prevent floating voltages from generating false system alarms.

• Loop Power Limitations: When utilizing modules with integrated loop power distribution, verify that the total current draw of the field transmitters does not exceed the module's maximum power supply rating.

• Environment Controls: Ensure the modules are installed within a clean control room enclosure that meets the specified temperature limits. In environments with corrosive gases like hydrogen sulfide, specify modules with G3 conformal coating.

The structure and details of the product：

Our services：

Shipping Port:  China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

Warranty: one year

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Our main products include DCS control system spare parts, PLC system spare parts, and robot system spare parts. Our advantageous brands include Allen Bradley, Bently Nevada, ABB, HIMA, Reliance, Bender, National Instruments, Emerson Ovation, Honeywell, Siemens, Allen Bradley, ICS Triplex, FOXBORO, Schneider, GE Fanuc, Motorola, HIMA, Prosoft, and other imported industrial components. Our main products serve a wide range of electronic, metallurgical, chemical, and power plants Industries such as steel mills, rubber, cement, machinery and equipment, and construction.