Overview

The ABB DO802 is a robust digital output relay module designed for ABB AC 800M controllers and the S800 I/O system. It delivers 8 individually isolated relay outputs for safe and reliable switching in industrial environments. Each channel provides a normally‑open (NO) contact suitable for both DC (up to 110 V) and AC (up to 250 V) loads.

The module features output status indicators and an Output State Preservation (OSP) function, which sets outputs to a predefined state in case of errors. Its compact DIN‑rail design and hot‑swap capability simplify maintenance and reduce system downtime.

Technical Data

Key Features

• 8 isolated relay outputs for flexible control.

• Wide voltage range (24–250 V AC/DC).

• Output State Preservation (OSP) ensures safe fallback during errors.

• LED indicators for real-time output status.

• Hot-swap capability reduces downtime during maintenance.

• Compact design for easy integration into ABB S800 I/O racks.

Typical Applications

• Process industries: Driving solenoids, relays, and actuators in chemical and pharmaceutical plants.

• Power generation: Controlling turbine and boiler systems with reliable relay outputs.

• Water treatment facilities: Operating pumps, mixers, and monitoring equipment.

• Manufacturing automation: Providing digital relay signals for machine interlocks and safety systems.

• Infrastructure systems: Supporting building automation and utility monitoring networks.

Example: In a chemical plant, the DO802 can switch dosing pumps or safety interlocks, ensuring reliable operation even under fault conditions thanks to its OSP function.

FAQ

Q1: How many channels does the DO802 provide?
A1: It offers 8 galvanically isolated relay outputs.

Q2: What voltage range is supported?
A2: It supports 24–230 V AC/DC, up to 250 V AC.

Q3: What is the maximum current per channel?
A3: Each channel can handle up to 2 A.

Q4: Does the DO802 provide diagnostics?
A4: Yes, it includes LED indicators and OSP error handling.

Q5: What systems is it compatible with?
A5: It integrates with ABB AC 800M controllers and the S800 I/O system.