Description

The DO801 ABB is a robust and versatile 16-channel digital output module, forming an integral part of the ABB S800 I/O family, which is a cornerstone of the flagship System 800xA and Compact Product Suite (AC 800M) distributed control systems (DCS). This module serves as a critical executive interface, designed to translate control logic commands into physical actions by switching loads such as solenoid valves, motor contactors, relay coils, indicator lamps, and alarm horns. The core function of the DO801 ABB is to provide reliable, galvanically isolated switching for a wide array of field actuators, enabling the automation system to directly influence the process based on programmed logic and operator commands. Its design prioritizes operational safety, signal integrity, and seamless integration within the broader ABB ecosystem, making it a trusted component for executing control decisions in continuous process and hybrid automation applications.

As part of the modular S800 series, the DO801 ABB is designed for high availability and easy maintenance. It is typically installed in an S800 station and interfaces with the field through an external FTA (Field Terminal Assembly), which physically separates the sensitive electronics from the field wiring. This design philosophy allows for modules to be replaced without disturbing the installed wiring, significantly reducing mean time to repair (MTTR). The DO801 ABB is known for its robust performance in demanding industrial environments, featuring effective protection against overloads, short circuits, and electrical transients. It embodies ABB’s commitment to providing scalable, reliable, and high-fidelity I/O solutions that form the critical link between the digital control world and physical industrial processes.

DO801 ABB

Technical Specifications

Main Features and Advantages

The DO801 ABB is distinguished by its use of robust electromechanical relay outputs, which provide complete galvanic isolation between the control system and the field load. This is a significant advantage, as it completely eliminates the risk of damaging voltage transients or electrical noise from the field side propagating back into the sensitive system backplane. The dry contact configuration offers ultimate flexibility, allowing the module to switch both AC and DC loads of varying voltages (within its rating) without requiring any changes to the module itself, simply by using different external power supplies for the loads. This versatility drastically simplifies system design and reduces the diversity of spare parts required.

Furthermore, the module is designed for high diagnostic capability and operational safety. Each of the 16 channels features a bright LED indicator, providing instant visual confirmation of the commanded output state directly on the module, which is invaluable for rapid troubleshooting. The separation of the electronics from the field wiring via the FTA (Field Terminal Assembly) is a key maintenance feature, enabling safe and easy module replacement without the need to disconnect any field wires. The DO801 ABB is also designed for hot swapping in appropriately configured systems, allowing for maintenance without a full system shutdown. This combination of isolation, flexibility, and ease of maintenance makes it an exceptionally reliable and cost-effective solution for a wide range of output applications.

Application Field

The DO801 ABB finds extensive application across a broad spectrum of process and manufacturing industries where reliable control of actuators is required. It is a fundamental component in chemical processing plants and oil & gas refineries, used to operate solenoid valves for process control, actuate motorized valves via contactors, and trigger alarm annunciators and warning lights. In power generation facilities, the DO801 ABB is deployed to control auxiliary systems, sequence equipment startups and shutdowns, and operate dampers and louvres.

It is also widely used in water and wastewater treatment plants to control pump valves, chemical dosing pumps, and aeration systems. In pulp and paper mills, it drives actuators on paper machines and material handling systems. Furthermore, its relay outputs make it ideal for hybrid and discrete manufacturing applications for controlling machinery like conveyors, packaging equipment, and automated assembly lines. Essentially, the DO801 ABB is specified anywhere within the ABB DCS ecosystem that requires the robust and isolated switching of various AC or DC loads for control, sequencing, and alarm functions.

DO801 ABB

Related Products

ABB S800 I/O Baseplate: The mounting unit, such as EI813, which houses the module and connects it to the field bus.

ABB TU811 FTA: The Field Terminal Assembly unit used for connecting the field wiring and load power to the DO801 module.

ABB DI801: The 16-channel Digital Input Module, the complementary input partner.

ABB AI801: Analog Input module for reading 4-20mA signals from transmitters.

ABB AC 800M Controller: The high-level process controller (e.g., PM864 or PM865) that the S800 I/O system serves.

ABB System 800xA: The comprehensive distributed control system architecture that utilizes this I/O.

ABB CI871: A communication interface module for integrating the S800 I/O into various network backbones.