ABB AI801 Analog Input Module Overview

The ABB AI801 is an 8-channel analog input module in the ABB Advant 800xA (also known as the S800 I/O) system, widely used for industrial automation and field signal acquisition.

Main Functions and Features

Number of Channels:
8 analog input channels, each independently configurable.

Supported Signal Types:

Current: 0…20 mA, 4…20 mA (some models support 0…30 mA)

Voltage: −10 V…+10 V, 0…10 V, 2…10 V, etc.

Temperature sensors: Compatible with thermocouples and RTDs (for certain models).

Resolution and Accuracy:
12-bit (some models offer 16-bit) resolution; accuracy up to ±0.1 % FS (high-end versions up to ±0.01 % FS).

Input Impedance:
Approx. 1 MΩ for voltage inputs, 250 Ω for current inputs, with built-in PTC current-limiting protection.

Isolation:
Channel-to-ground isolation, withstands up to 500 V isolation voltage.

Communication Interfaces:
Supports MODBUS-RTU, PROFIBUS DP, and ABB Advant fieldbus; also compatible with HART protocol for field diagnostics.

Power Supply:
24 V DC, typical power consumption ≈ 2 W.

Environmental Tolerance:
Operating temperature −25 °C to +70 °C (some models −40 °C to +85 °C); protection class IP67; vibration and shock-resistant design.

Dimensions / Weight:
Approx. 35 mm × 100 mm × 23 mm; weight ≈ 0.2 kg.

Typical Applications

Process Control: Acquisition and monitoring of analog signals such as temperature, pressure, and flow.

Robotic Coating Systems: Controls air and liquid supplies to spray guns for efficient and reliable coating operations.

Manufacturing Industries: Integration of field sensors in automotive, furniture, appliance, electronics, and aerospace sectors.

Selection Guidelines

Signal Type Compatibility: Choose the input range according to the sensor output (current or voltage).

Resolution Requirements: For applications demanding higher precision, select the 16-bit version.

Communication Protocol: Ensure module compatibility with existing MODBUS-RTU or PROFIBUS networks.

Environmental Conditions: For high-temperature or humid environments, select models with extended temperature range and IP67 protection.

In summary, the ABB AI801 delivers high-precision, multi-channel analog input capabilities, providing reliable signal acquisition for industrial field applications. It is one of the key I/O modules commonly used in the ABB Advant 800xA system.