ABB AI801 – Analog Input Module (800xA / AC800M Series)
Overview
The ABB AI801 is a high-precision analog input module designed for the ABB AC800M and 800xA distributed control platforms. It is widely used in power, petrochemical, water treatment, and industrial automation systems to collect real-time analog measurement signals such as temperature, pressure, level, and flow. The module offers accurate signal conversion, robust noise immunity, and long-term operational stability in harsh industrial environments.
Module Parameters
| Parameter |
Description |
| Input Channels |
8 analog inputs (single-ended or differential) |
| Signal Types Supported |
0–20 mA, 4–20 mA, 0–10 V, ±10 V (selectable by configuration) |
| Resolution |
12-bit A/D conversion |
| Isolation |
Channel-to-system and channel-to-channel electrical isolation |
| Power Supply |
From system bus (no external supply required) |
| Operating Temperature |
0°C to +55°C |
| Storage Temperature |
-40°C to +70°C |
| Mounting |
DIN-rail or panel mount in AC800M I/O base |
| Diagnostics |
LED status per module + internal self-test |
| Certifications |
CE, UL, and IEC industrial compliance |
Structure & Functional Design
Front Terminal Block – Detachable wiring connector for easy field installation
High-Accuracy A/D Conversion Circuit – Ensures low-drift signal conversion
EMC Protection Stage – Filters surge, noise, and high-frequency interference
On-Board Microprocessor – Handles sampling, scaling, filtering, and diagnostics
Backplane Connector – Provides power and I/O bus interface to the AC800M CPU
Key Features
Supports both current and voltage analog signals without hardware modification
Automatic diagnostics: open-circuit, signal range fault, module health
Designed for continuous 24/7 operation in critical industrial environments
Hot-swap capable when used in redundant control configurations
Compatible with ABB Control Builder / Configuration Software
Long lifecycle product with ABB spare-part availability and service support
Typical Applications
Power plant turbine and boiler instrumentation
Oil & gas production and refining process control
Water & wastewater level and flow monitoring
Chemical batching, dosing, and reactor feedback measurement
Food & beverage and pharmaceutical process automation
Retrofit upgrades of older ABB S800 / S900 input systems
Installation & Maintenance Guidelines
Installation Steps
Insert the AI801 into the appropriate I/O base unit until it locks securely.
Wire analog sensor loops to terminal block with proper shielding and grounding.
Configure input type (current/voltage) in ABB Control Builder software.
Power up the system and verify module status via LED and diagnostics.
Maintenance Notes
Use shielded twisted-pair cabling for long-distance sensor runs.
Perform periodic calibration checks in high-precision applications.
Inspect terminal screws annually to prevent vibration loosening.
Replace only with ABB original parts to maintain isolation & accuracy specs.
Additional Information
Often purchased as a spare for long-running ABB 800xA control systems.
Fully compatible with AI810, AI820, and other S800 I/O family modules.
Supports both redundant and non-redundant controller architectures.
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