AI890 ABB Bailey

AI890 ABB Bailey Analog Output Modules

Product  Description：

• • • • • • The AI890 module is engineered to provide a bridge between field devices located in Zone 0, 1, or 2 and the standard control system backplane. It features integrated galvanic isolation for each channel, which eliminates the need for external safety barriers. This significantly reduces the footprint and complexity of the control cabinet. The module is "hot-swappable," meaning it can be replaced while the system is powered and the rest of the I/O station is operational, provided the replacement is done according to safety guidelines. It communicates with the ABB Ability System 800xA or other controllers via the ModuleBus interface.

            Product Parameters

            • Number of Channels: 8 isolated analog input channels.

            • Input Signal Range: Standard $4-20 \text{ mA}$ current loop.

            • A/D Resolution: 12 bits, providing high precision for process variables.

            • Isolation: Individual galvanic isolation for each channel up to $50 \text{ V}$.

            • Intrinsic Safety Rating: Approved for connection to equipment in Zone 0 (Group IIC) and Class I, Div. 1.

            • Input Resistance: Typically $250 \text{ $\Omega$}$ including the input protection circuitry.

            • Update Time: Approximately $10 \text{ ms}$ for all 8 channels.

            • Power Dissipation: Low power design, typically $2.5 \text{ W}$ at $24 \text{ VDC}$.

            • Module Termination Unit (MTU) Compatibility: Requires specific MTUs like the TU890 or TU891 for proper field wiring and IS separation.

            Product Advantages

            A primary advantage of the AI890 is its Integrated Safety. By having intrinsic safety barriers built directly into the module, users save significant costs on hardware, wiring labor, and cabinet space. The High Channel Density (8 channels in a compact module) allows for efficient scaling of large process plants.

            The module also offers Advanced Diagnostics, including detection of open circuits, short circuits, and underflow/overflow conditions. This proactive monitoring helps maintenance teams identify sensor failures before they cause a process trip. Furthermore, the Galvanic Isolation ensures that electrical noise or faults on one field loop do not propagate to other channels or the main control system, ensuring high system availability and data integrity.

            Important Considerations and Precautions

            When installing the AI890, it is critical to observe the Separation of IS and Non-IS Wiring. To maintain the safety certification, intrinsically safe field cables must be routed separately from standard power and control cables to prevent energy transfer during a fault. MTU Selection is also vital; the AI890 must only be used with its designated Termination Units to ensure the physical distance requirements for safety are met.

            Technicians must verify the Maximum Loop Resistance of the connected field device to ensure the AI890 can provide sufficient voltage to power the transmitter. Since this is an electronic module, Electrostatic Discharge (ESD) precautions should be taken when handling the unit outside of its grounded enclosure. Finally, while the module is hot-swappable, always check the Hazardous Area Classification and local safety permits before opening a cabinet in an explosive atmosphere.

            Product Applications

            The ABB AI890 is specifically utilized in industries where explosive gases or dusts are present.

            • Oil and Gas Upstream: Monitoring pressure and flow transmitters on offshore platforms and wellheads.

            • Petrochemical Refining: Interfacing with temperature and level sensors in fuel storage tanks and processing units.

            • Pharmaceutical Manufacturing: Managing analog signals in solvent recovery areas where flammable vapors are common.

            • Distilleries and Alcohol Processing: Controlling fermentation and distillation processes where ethanol vapors present a high risk.

            • Mining and Tunneling: Monitoring gas detection sensors (methane, CO) in underground environments.

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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JUSTWELL PTE. LTD

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