DO820 3BSE008514R1 Overview

The ABB DO820 3BSE008514R1 Digital Output Relay 8 ch is an 8-channel relay output module for the S800 I/O system, providing isolated 230V AC/DC switching with individual status indication and safety supervision features.

Features and benefits

High-Capacity Relay Outputs: Eight channels handle up to 250V AC/DC and 3A, ideal for direct switching of motors, valves, and actuators.

Individual Channel Isolation: Provides complete electrical separation between each output for enhanced safety and signal integrity.

Clear Visual Diagnostics: Each channel has an LED indicator for immediate on-site status monitoring of the relay state.

Safety-Focused Voltage Supervision: Continuously monitors the 24V supply and triggers a clear warning signal if power is lost.

Fail-Safe Output Handling: The Output Safety Protection (OSP) feature ensures outputs move to a predetermined safe state upon an error detection.

Robust Electromagnetic Compatibility: Built-in EMC protection components ensure stable operation in electrically noisy industrial environments.

FAQ

Q1: What is the ABB DO820 3BSE008514R1?

A1: It is an 8-channel digital output relay module for the S800 I/O system, designed for high-power switching.

Q2: What voltage and current can each channel handle?

A2: Each channel can switch loads of 24-230V AC/DC with a maximum continuous current of 3 Amps.

Q3: Are the output channels electrically isolated?

A3: Yes, all eight relay output channels are individually galvanically isolated for safety and noise immunity.

Q4: What units are required to connect field wiring to this module?

A4: Field wiring requires a compatible Module Termination Unit, such as the TU811, TU813, or TU831.

Q5: What type of load can these relay outputs control?

A5: They are suitable for AC/DC loads like motors, solenoids, and heaters, requiring a power factor (cos φ) greater than 0.4 for AC.