DI821 ABB - Digital Input Module | S800 230V AC/DC Input

ABB DI821 High Voltage Digital Input Module

The ABB DI821 provides 8-channel digital input capability for S800 I/O systems. Designed for high voltage applications, this module accepts both AC and DC signals. Each channel features individual isolation for enhanced safety. The DI821 offers reliable performance in industrial automation environments.

Key Features

• 8 individually isolated channels for maximum safety
• Dual voltage support: 230V AC and 220V DC
• Voltage supervision on channels 1 and 8
• Built-in analog filtering (6 ms)
• Comprehensive diagnostic indicators

Technical Specifications

• Article Number: 3BSE008550R1
• AC Input Range: 164-264 V at 11 mA
• DC Input Range: 175-275 V at 1.6 mA
• Input Frequency: 47-63 Hz for AC operation
• Input Impedance: 21 kΩ (AC) / 134 kΩ (DC)

Isolation and Protection

• Individual channel isolation for each input
• Rated Insulation Voltage: 250 V
• Dielectric Test Withstands: 2000 V AC
• EMC Protection components on all channels
• Current limiting for sensor protection

Voltage Supervision

• Channel 1 supervises inputs 2-4
• Channel 8 supervises inputs 5-7
• Warning LED activates on voltage loss
• Error signals readable via ModuleBus
• Automatic error detection and reporting

Physical Properties

• Compact Dimensions: 45 x 102 x 119 mm
• Lightweight Design: 0.18 kg
• Keying Code: AC for proper installation
• IP20 Protection Rating

Wiring and Connectivity

• Maximum Cable Length: 200m AC / 600m DC
• Digital Filter Times: 2, 4, 8, 16 ms selectable
• Analog Filter Delay: 5/28 ms on/off
• Compatible with TU811V1 termination units

Environmental Ratings

• Operating Temperature: 0 to +55°C
• Storage Temperature: -40 to +70°C
• Humidity Range: 5-95% non-condensing
• Pollution Degree: 2 per IEC 60664-1

Compatibility Information

• Designed for S800 I/O System
• Compatible MTUs: TU811, TU813, TU831
• Also works with: TU839, TU851
• Keying system prevents misinstallation

Certifications and Standards

• CE Mark Certified
• RoHS Compliance: 2011/65/EU
• Marine Approvals: ABS, BV, DNV, LR
• Safety Standards: EN 61010-1, UL 61010-1

Diagnostic Capabilities

• Front Panel Status LEDs: Fault, Run, Warning
• Individual Channel Status Indicators
• ModuleBus Communication for remote monitoring
• Real-time error reporting and diagnostics

Ordering and Support

• Includes complete DI821 module
• Global shipping via major carriers
• Technical support available
• Comprehensive documentation provided

Common Applications

• Industrial motor status monitoring
• High voltage equipment control
• Power distribution systems
• Process automation inputs

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