ABB AI825 Analog Input Module | 4-Channel

ABB AI825 4-Channel Isolated Analog Input Module

The ABB AI825 module provides four individually isolated analog inputs for S800 I/O systems. It supports both bipolar voltage and current signals with high precision. This advanced module offers exceptional isolation and accuracy for critical measurement applications.

Key Features

• Four individually galvanic isolated channels
• 14-bit resolution plus sign for high accuracy
• Bipolar voltage and current input capability
• Channel-to-channel isolation up to 1900V DC
• Input shunt resistors protected to 30V DC
• Wide input range support

Technical Specifications

• Brand: ABB
• Model: AI825
• Article Number: 3BSE036456R1
• Number of Channels: 4
• Signal Types: ±20mA, 0-20mA, 4-20mA, ±10V, 0-10V, 2-10V
• Resolution: 14-bit plus sign
• Input Impedance: 10 MΩ (voltage), 50 Ω (current)
• Accuracy: Max. 0.1% error
• Update Cycle: < 10 ms
• Max Cable Length: 600 meters

Isolation & Protection

• Individual channel isolation
• 1900V DC channel-to-channel isolation
• 3250V DC channel-to-ground isolation
• Input withstands up to 30V DC overvoltage
• Current limiting PTC resistor protection
• Rated insulation voltage: 250V

Signal Performance

• CMRR: 120 dB at 50/60 Hz
• NMRR: >40 dB at 50Hz, >55 dB at 60Hz
• Input Filter: 115 ms (voltage), 130 ms (current)
• Temperature Drift: 34-78 ppm/°C depending on range
• Under/over range: ±15%

Power Requirements

• +5V Modulebus: 70 mA typical, 100 mA max
• +24V Modulebus: 90 mA typical, 110 mA max
• +24V External: Not required
• Power Dissipation: 2.5W typical, 3.2W maximum

Diagnostics & Monitoring

• Front panel status LEDs (Fault, Run, Warning)
• Internal power supply supervision
• Module Error and Warning indications
• Channel error detection and reporting
• Comprehensive fault monitoring

Environmental Specifications

• Operating Temperature: 0 to +55°C
• Storage Temperature: -40 to +70°C
• Protection Class: IP20
• Relative Humidity: 5 to 95% non-condensing
• Corrosive Atmosphere: ISA-S71.04 G3

Physical Dimensions

• Width: 45 mm (1.77”)
• Depth: 102 mm (4.01”)
• Height: 119 mm (4.7”)
• Weight: 0.22 kg (0.49 lbs.)

Compatibility

• Designed for S800 I/O platform
• Works with TU811, TU813, TU831 series
• Keying code: DA

Shipping Information

• Secure industrial packaging
• Worldwide shipping via FedEx, UPS, DHL
• Complete documentation included

Frequently Asked Questions

What is the isolation capability of the AI825?

The module provides 1900V DC channel-to-channel isolation and 3250V DC channel-to-ground isolation.

What resolution does the AI825 offer?

It features 14-bit resolution plus sign for high-precision measurements.

Can I mix different signal types on the same module?

Each channel can be individually configured for voltage or current inputs.

What is the maximum input voltage protection?

The current inputs are protected to 30V DC with PTC resistor current limiting.

Which MTU models are compatible?

The ABB AI825 works with TU811, TU813, and TU831 series MTUs.

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