AI820 ABB S800 I/O Analog Input Module

Description

AI820 ABB S800 I/O Analog Input Module

Product Dimensions：

Product Description (Detailed Explanation)

The AI820 provides 4 differential input channels. Unlike single-ended modules, its differential design offers superior noise immunity and higher precision, making it ideal for measuring small signals in environments with significant electromagnetic interference.

Each channel can be independently configured via software to measure either Voltage or Current. The module performs A/D conversion with high resolution and transmits the digitized values to the controller via the ModuleBus. It also includes comprehensive self-diagnostics to ensure signal integrity and hardware health.

Product Parameters (Technical Specifications)

Product Advantages (Key Benefits)

• High Noise Rejection: The differential input circuitry effectively cancels out common-mode noise, which is critical for long cable runs in industrial plants.

• Bipolar Measurement: Capability to measure negative voltages/currents (e.g., ±10V), allowing it to interface with specialized scientific and industrial sensors.

• Flexible Configuration: Each channel is software-programmable, eliminating the need for physical jumpers on the module for different signal types.

• Robust Diagnostics: Includes over-range/under-range detection and internal hardware monitoring, which triggers system alarms to prevent incorrect process control.

• Hot-Swap Support: Can be replaced while the system is powered (RIUP – Removal and Insertion Under Power) when used with an appropriate Module Termination Unit (MTU).

Precautions (Important Notes)

• MTU Compatibility: The AI820 must be paired with a compatible Module Termination Unit (such as TU810, TU812, or TU814). Ensure the MTU matches your wiring requirements (e.g., fused or non-fused).

• Current Measurement: To measure current (4-20mA), an external precision shunt resistor (typically 250Ω) must be connected across the input terminals if not integrated into the MTU.

• Shielding: To maintain the high accuracy of the 14-bit resolution, use twisted-pair shielded cables and ensure the shield is correctly terminated at the MTU grounding bar.

• Common Mode Voltage: Ensure the common-mode voltage between channels does not exceed the rated limit (typically 50V) to avoid damage or measurement errors.

Product Applications (Typical Use Cases)

• Chemical & Oil/Gas: Precise monitoring of pressure and flow transmitters where high accuracy is required for safety and billing.

• Power Generation: Measuring excitation voltages or turbine speed signals that may involve bipolar (±) ranges.

• Metals & Mining: Interfacing with weight scales or tension load cells that provide low-voltage differential outputs.

• HVAC & Cleanrooms: Monitoring highly sensitive differential pressure sensors for laboratory environment control.

Shipping Port: Xiamen, 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

Please make an inquiry for more models：