ABB DO820 3BSE008514R1 Individually Isolated Module

Product Overview

The ABB DO820 (3BSE008514R1) is a high-flexibility relay output module for the S800 I/O system. Unlike standard transistor outputs, the DO820 utilizes mechanical relays to provide individual galvanic isolation for each of its 8 channels. This allows you to control a variety of external voltages—ranging from 24V to 230V AC or DC—within the same module, making it an essential interface for disparate field equipment like motor starters, solenoids, and heavy-duty contactors.

Core Performance Features

• Individually Isolated Channels: Every relay contact is electrically independent, preventing ground loops and allowing you to mix different phases or voltage levels (e.g., 24V DC on Channel 1 and 230V AC on Channel 2).

• High Switching Capacity: Supports up to 3A per channel for AC loads ($\cos \phi > 0.4$) and up to 42W for DC loads, reducing the need for external interposing relays.

• Broad Voltage Range: Rated for operation between 24V and 230V AC/DC, providing a "universal" solution for digital output requirements.

• Durable Mechanical Relays: Built for long-term reliability in switching inductive and resistive loads in demanding industrial environments.

• Comprehensive MTU Support: Compatible with a variety of termination units, including the TU811, TU813, and TU831, to suit your specific wiring density and safety needs.

Technical Breakdown

• Part Number: 3BSE008514R1

• Designation: DO820

• Output Type: Relay (Digital Output)

• Channel Count: 8 (Individually Isolated)

• Max Current: 3A (AC) / 42W (DC)

• Operating Voltage: 24–230V AC/DC

• Dimensions: 119mm (H) x 45mm (W) x 102mm (D)

• Net Weight: 0.3 kg