The ABB DI801 3BSE020508R1 is a high-density digital input module used in the ABB S800 I/O series for distributed control systems such as ABB AC800M and 800xA. This module offers 16 channels for 24 V DC digital inputs and supports sink (negative logic) configuration. It features status LEDs for each channel, internal diagnostics, and robust noise immunity, making it a highly reliable module for industrial automation and process control systems.

The DI801 module is engineered to deliver rapid response and high reliability in challenging industrial environments, offering seamless integration with ABB’s automation platforms via ModuleBus communication.

Key Features

• 16-channel 24 V DC digital input

• Sink (negative logic) type input configuration

• Channel-level status LEDs for real-time diagnostics

• Galvanic isolation between input channels and system bus

• Integrated fuse protection for enhanced safety

• Designed for ABB S800 I/O systems

• DIN rail mounting with compact form factor

• Hot swap capability for reduced downtime

Technical Specifications

Industry Applications

The DI801 is widely used in distributed control and automation systems across various sectors where 24 V DC input detection is essential:

• Oil & Gas – Monitoring valve positions, interlocks, and alarms

• Power Generation – Status signals from breakers, switches, and sensors

• Chemical & Petrochemical – Secure logic interfacing in hazardous zones

• Pharmaceutical – Digital feedback from process instruments

• Food & Beverage – Compact integration with production line sensors

• Water & Wastewater – Input monitoring from float switches, pumps, and level sensors

Product Advantages

• Compact Design – Space-efficient module with high input density

• Robust Operation – Performs reliably under electromagnetic and environmental stress

• Field Diagnostics – LED indicators help in fast fault location

• Safe and Isolated – Galvanic isolation reduces risk of system faults

• Flexible Wiring – Supports a range of digital field input devices

• S800 I/O Compatibility – Seamless integration with AC800M, 800xA

Frequently Asked Questions (FAQ)

1. What is the primary function of the DI801 module?

   It reads the ON/OFF status of 16 digital signals from field devices at 24 V DC.

2. Which logic type does it use—sink or source?

   The DI801 uses sink-type logic (negative logic).

3. Can I monitor the status of each input?

   Yes, each channel includes an LED indicator for live status feedback.

4. Is the module hot-swappable?

   Yes, you can hot swap it without shutting down the system.

5. Which ABB system is the DI801 compatible with?

   It works with S800 I/O, and integrates with AC800M, 800xA, and Freelance DCS.

6. How is the module installed?

   It mounts on a DIN rail via terminal base units like TU830V1 or TU810V1.

7. Does it provide electrical isolation?

   Yes, it has galvanic isolation between channels and control logic.

8. What is the input response time?

   Typically under 4 milliseconds, ensuring fast signal capture.

9. Is the module certified for marine or hazardous use?

   Yes, it meets marine and industrial certifications including CE and RoHS.

10. What happens if an input fuse fails?

    The module’s diagnostics will detect and report fuse failure immediately.