---
title: "DCS (Distributed Control System)"
description: "A DCS (Distributed Control System) is the plant-wide process-automation system that combines operator workstations, controllers, network infrastructure and field-device interfaces into a single integrated platform. Major DCS suppliers include Emerson DeltaV, Honeywell Experion, Yokogawa Centum VP, ABB 800xA, Siemens PCS 7 and Schneider Foxboro Evo."
canonical_url: "https://sylio.co/glossary/dcs"
last_updated: "2026-06-28T02:29:28.350Z"
---

A **DCS (Distributed Control System)** is the plant-wide process-automation system that combines operator workstations, controllers, network infrastructure and field-device interfaces into a single integrated platform. Major DCS suppliers include Emerson DeltaV, Honeywell Experion, Yokogawa Centum VP, ABB 800xA, Siemens PCS 7 and Schneider Foxboro Evo.

## Sonic-horn / DCS integration

Modern [sonic-horn](/glossary/sonic-horn) installations typically integrate to the existing plant DCS to provide:

- **Operator visibility** — horn-running status, last-fire time, air supply pressure on the operator HMI
- **Operator control** — manual start, manual silence, mode change
- **Alarm reporting** — stuck valve, low pressure, controller fault
- **Process-condition response** — fire-rate increase if [ΔP](/glossary/differential-pressure-baghouse) rises, or [opacity](/glossary/opacity) excursion

Integration is via [fieldbus](/glossary/modbus-profibus-profinet) (Modbus, Profibus, Profinet) or hardwired discrete I/O.

## Related terms

- [PLC](/glossary/plc)
- [Cycle controller / sequencer](/glossary/cycle-controller-sequencer)
- [Modbus / Profibus / Profinet](/glossary/modbus-profibus-profinet)