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DO821

DO821 ABB - Relay Output Module | 8-Channel 230V

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  • Manufacturer: ABB

  • Product No.: DO821

  • Product Type: Digital Output Module

  • Product Origin: SE

  • Payment:T/T, Western Union

  • Weight: 230g

  • Shipping port: Xiamen

  • Warranty: 12 months

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Düşündiriş

ABB DO821 Relay Output Module for S800 I/O Systems

The ABB DO821 provides reliable relay output control for industrial automation applications. This 8-channel module handles high voltage loads up to 250V AC/DC with robust 3A contacts. It offers individual channel isolation and comprehensive diagnostic capabilities.

Key Technical Specifications

  • Brand: ABB
  • Model: DO821
  • Output Channels: 8 relay channels
  • Voltage Rating: 5-250V AC/DC range
  • Current Capacity: 3A per channel continuous
  • Contact Type: Normally Closed (NC) configuration
  • Isolation: Individual channel-to-channel isolation
  • Power Dissipation: 2.9W typical operation

Electrical Characteristics

  • Output Type: Relay contacts with NC operation
  • Maximum Voltage: 250V AC/DC working voltage
  • Dielectric Strength: 2000V AC test voltage
  • Current Consumption: 60mA at +5V ModuleBus
  • Relay Power: 140mA at +24V ModuleBus
  • Cable Length: 600 meters maximum field wiring

Protection and Safety Features

  • Individual channel isolation for safety
  • EMC protection components on all outputs
  • Optical isolation barriers for noise immunity
  • Relay power supply voltage monitoring
  • Overvoltage Category: III according to standards
  • IP20 protection against dust and contact

Environmental Specifications

  • Operating Temperature: 0°C to +55°C range
  • Storage Temperature: -40°C to +70°C limits
  • Humidity Range: 5% to 95% non-condensing
  • Pollution Degree: Level 2 classification
  • Corrosion Protection: ISA-S71.04 G3 rating
  • Vibration Compliance: IEC 61131-2 standard

Diagnostics and Monitoring

  • 8 individual channel status LEDs
  • Module indicators: Fault, Run, Warning, OSP
  • Relay supply voltage supervision
  • ModuleBus communication for diagnostics
  • Configurable error detection parameters
  • Real-time status monitoring capability

Installation and Compatibility

  • Compatible with S800 I/O mounting units
  • Works with TU811, TU813, TU831 MTUs
  • Keying code CA for proper installation
  • Compact dimensions: 45mm W × 119mm H × 102mm D
  • Weight: 0.23 kg for easy handling
  • Standard rail mounting design

Packaging and Shipping

  • Includes one ABB DO821 module
  • All necessary installation components
  • Fast worldwide shipping via FedEx, UPS, DHL
  • Secure industrial packaging protection

Frequently Asked Questions

  • What does Normally Closed (NC) mean?
    NC contacts are closed when the relay is not energized and open when activated for fail-safe operation.
  • How is channel isolation beneficial?
    Individual isolation prevents cross-channel interference and allows mixed voltage applications on different channels.
  • What monitoring capabilities are available?
    The module provides relay power monitoring and status indicators with ModuleBus communication for system integration.
🏷️ Tags: Digital Output Module

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