DO820 8-Channel 3A Relay Module by ABB | 250V

ABB DO820 8-Channel 230V Relay Output Module

The ABB DO820 module provides eight relay outputs for S800 I/O systems. It handles high-power loads with 3A switching capability. This robust module features individually isolated relay contacts for maximum flexibility.

Key Features

• Eight relay outputs with Normally Open (NO) contacts
• Individual channel isolation for each relay
• 3A maximum continuous current per channel
• Output Status Protection (OSP) functionality
• Relay supply voltage supervision
• Wide voltage range: 5-250V AC/DC

Technical Specifications

• Brand: ABB
• Model: DO820
• Article Number: 3BSE008514R1
• Output Type: Relay (Normally Open)
• Output Voltage: 5-250V AC/DC maximum
• Output Current: 3A per channel
• Isolation: Individual channel-to-channel isolation
• Rated Insulation Voltage: 250V
• Max Cable Length: 600 meters
• Power Dissipation: 2.9 Watts typical

Relay Specifications

• Normally Open (NO) contacts
• 3A switching capacity AC/DC
• 250V maximum contact voltage
• Individual relay drivers
• Optical isolation barriers

Power Requirements

• +5V Modulebus: 60 mA
• +24V Modulebus: 140 mA
• Relay power from ModuleBus distribution
• Configurable voltage supervision

Diagnostics & Monitoring

• Front panel status LEDs (Fault, Run, Warning, OSP)
• Eight channel status indicators
• Relay power converter monitoring
• Module Error and Warning indications
• Event recording accuracy: -0/+1.3 ms

Protection Features

• Output Status Protection (OSP)
• Relay supply voltage supervision
• Configurable error response
• EMC protection components
• Dielectric strength: 2000V AC

Installation & Wiring

• Compatible with S800 I/O systems
• Standard S800 mechanical dimensions
• Supports 0.05-2.5 mm² wire sizes
• Detachable connector system
• Easy integration with ABB MTUs

Environmental Specifications

• Operating Temperature: 0 to +55°C
• Storage Temperature: -40 to +70°C
• Protection Class: IP20
• Relative Humidity: 5 to 95% non-condensing
• Marine certifications: ABS, BV, DNV, LR

Physical Dimensions

• Width: 45 mm (1.77”)
• Depth: 102 mm (4.01”)
• Height: 119 mm (4.7”)
• Weight: 0.23 kg (0.5 lbs.)

Compatibility

• Designed for S800 I/O platform
• Works with TU811, TU813, TU831 series
• Compatible with TU836, TU837, TU851
• Keying code: AD

Shipping Information

• Secure industrial packaging
• Worldwide shipping via FedEx, UPS, DHL
• Complete documentation included

Frequently Asked Questions

What type of relay contacts does the DO820 use?

The module features Normally Open (NO) relay contacts on all eight channels.

What is the maximum switching capacity?

Each relay can handle 3A at 250V AC/DC maximum.

How is channel isolation configured?

All eight channels feature individual isolation between channels and common.

What power supervision features are included?

The module monitors 24V relay supply voltage with configurable supervision.

Which MTU models are compatible?

It works with TU811, TU813, TU831, TU836, TU837, and TU851 series.

Copyright © 2025 AutoNex Controls Limited. All rights reserved.

Reference Source: www.autonexcontrol.com

Contact our sales team for pricing and technical support: Email: sales@nex-auto.com Phone: +86 153 9242 9628 (WhatsApp available)