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RTU has the capability to control the I/O devices and to monitor the I/O devices, we need software like SCADA to access the data from the RTU.

In case of DCS, both the controlling and monitoring things all done by the DCS itself.

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What is DCS experience for a chemical operator?

Distributed Control System


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Distributed Control System


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What is the advantage of DCS over PLC?

SCADA is an abbreviation for Supervisory Control and Data Acquisition . DCS stands for Distributed Control System. Normally, a SCADA system will get the data from a RTU (remote terminal unit). A RTU runs independently, except for some control from the central supervisory system such as fire fighting, emergency shut-down (i.e water & oil pipelines). The communication path will be through a GSM, wireless technology, etc... For a DCS system, it controls the process as a stand-alone system. It has the control loops built into it's own controller. The communication path will be through something like a LAN high-speed Ethernet, or other communications network. DCS is a single unit, or a group of local units I think that my clarification helps a little bit on the subjects of DCS and SCADA. Thanks


How many inputs outputs in dcs?

The number of inputs and outputs (I/Os) in a Distributed Control System (DCS) can vary widely depending on the specific application and system design. A DCS can have anywhere from a few dozen to several thousand I/Os, accommodating a range of sensors, actuators, and control elements. The configuration typically depends on factors such as the complexity of the process being controlled, the level of automation required, and the architecture of the system. Ultimately, the scalability of a DCS allows it to be tailored to meet the specific needs of different industrial processes.

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