ABB DI821 3BSE008550R1 S800 I/O 8-Channel 230V AC Digital Input Module

Description

The DI821 3BSE008550R1 is an 8-channel high-voltage input module with individual galvanic isolation for each channel, ensuring safety and signal integrity. It includes hardware filtering to reduce AC noise and contact chatter and supports hot-swapping via MTUs for minimal downtime in critical utility and manufacturing applications.

Specifications

• Manufacturer: ABB

• Country of Origin: Switzerland

• Model Number: DI821 (3BSE008550R1)

• Product Type: Digital Input Module

• Number of Channels: 8 (Individually Isolated)

• Rated Input Voltage: 230 V AC

• Input Voltage Range: 164 to 264 V AC

• Input Frequency: 47 to 63 Hz

• Isolation: 2500 V galvanic isolation per channel

• Power Supply: 24 V DC (via ModuleBus)

• Weight: 0.35 kg

Features

• Direct Mains Sensing: Eliminates the requirement for interposing relays by directly interfacing with 230V AC field circuits.

• Individual Channel Isolation: Provides superior protection and noise immunity through independent galvanic isolation for every input path.

• Enhanced System Safety: High dielectric strength between field and logic circuits ensures the protection of sensitive controller hardware.

• Efficient Process Maintenance: Supports hot-swap functionality, enabling rapid module exchange without disrupting the operation of the remaining I/O station.

• Industrial-Grade Filtering: Integrated AC filters ensure accurate state detection by neutralizing high-frequency interference and mechanical contact bounce.

• Comprehensive Status Monitoring: An array of front-panel LEDs provides clear visual indication of individual channel logic states and module health.