Automation parts, worldwide supply
0
  • DO821
  • DO821-1
  • DO821-2
1 3

DO821

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

In stock (100 units), ready to be shipped

  • 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

30-Day Return Policy · 12-Month Warranty
  • Fast Delivery
  • 24/7 Support
  • Quality Assurance

Description

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

Scalar (V/f)

Vector

AC-powered
  • Confirm the exact model, part number, and specifications before ordering.
  • Ensure compatibility with your current machinery or control systems.
  • Reach out via sale@etowonauto.com or +8617859788089 for technical assistance.
  • Review delivery options, lead times, and shipping requirements.
  • Follow manufacturer instructions and best practices during installation.

In-stock items are typically dispatched the same business day. For products not currently in stock, dispatch times may vary based on availability. International shipping is available, and shipping costs are calculated according to destination, weight, and carrier selection.

Returns are accepted within 30 days of receipt, provided items are unused and in original condition. Return shipping costs are the responsibility of the customer. Please contact us before returning any item to receive return authorization.

For more details, please review our Shipping & Return Policy.

 View Product Details

ENSURE RELIABLE MACHINERY PERFORMANCE

Transform your home with the latest multi-electronics solutions, from intelligent lighting to vOptimize your operations with the Bently Nevada 3500 Monitoring System, offering real-time vibration and machinery condition monitoring to prevent failures and maximize uptime.oice-controlled devices all designed to make life easier, safer, and more connected.

Purchase now
Step-by-step technical advice and buying tips for industrial automation parts.

Technical & Buying Guide

View all blog