Key Features
32-channel isolated digital input module
24V DC input voltage (sinking/sourcing configurable)
High-density design saves cabinet space
Galvanic isolation between channels and system
Hot-swappable for easy maintenance
Diagnostic LEDs per channel for status monitoring
Technical Specifications
Part Number: 3BSE008550R1
Input Type: Dry contact or wet contact (24V DC)
Input Current: 3-5mA typical
Isolation: 500V AC between channels
Response Time: <1ms
Operating Temperature: -25°C to +60°C
Protection Class: IP20 (panel-mounted)
Certifications: CE, UL, ATEX (optional)
Communication & Integration
Interfaces with ABB's S800 I/O system
Compatible with AC 800M controllers
Supports PROFIBUS DP and Foundation Fieldbus
Configurable via ABB Control Builder
Typical Applications
Process automation systems
Power generation plants
Oil & gas facilities
Chemical processing
Water treatment systems
The ABB DI821 (3BSE008550R1) is a high-density digital input module designed for ABB's System 800xA and AC 800M control systems. This rugged industrial module provides reliable signal acquisition for process automation applications.