From Condensed Handbook of Measurement and Control, 3rd Edition


The design of control centers must meet the codes and regulations in effect at the site as well as the requirements for the plant's operation. Control centers, also commonly referred to as "control rooms," form the nerve center of a plant. They are generally air-conditioned, sometimes pressurized with clean air, and their temperature and humidity are controlled to preset conditions. Additional information is available from ISA-71.01 1985, Environmental Conditions for Process Measurement and Control Systems: Temperature and Humidity.

When designing a control center, the designer must develop a layout (see figure 11-1) and ensure that the center's design and use conforms to good engineering practice and standards. A good source of information on these is ISA's RP60 series of recommended practices for control centers. Some of the items that should be addressed when designing control centers are design, physical aspects, security, fire protection, air conditioning, electrical/electronic, and communication. These are discussed in this chapter.

Figure 11-1: Example of a control center layout.


Many points should be considered when designing control centers. For example, the control room should be located, whenever possible, away from sources of vibration and completely protected from heavy rain, external fire-fighting water, and the like. In some cases, the control room must be earthquake-proof. For safety purposes, no process lines should enter the control room except for instrument air. The electrical area classification should be taken into account when locating and designing the control room.

Where required (and where economically justifiable), the control room may need...

Products & Services
Air Conditioners
Air conditioners and building air conditioners are used in industrial, process computing, networking, and other spaces where thermal management is important.  Space and spot cooling equipment are used wherever total heat must be controlled or where localized heat sources must be managed.  Many refrigerants are used in air conditioners; CFC-free refrigerants are becoming more prevalent and in fact are required in many applications.
HVAC Ductwork
HVAC ductwork includes pipe or closed conduits made of sheet metal, fiberglass board, or other suitable material for conducting air to and from an air handling unit.
Lathes and Turning Centers
Lathes and turning centers cut a rotating part with a stationary cutting tool. The tool moves parallel and perpendicular to the workpiece axis to provide the desired finished shape.
Motor Control Centers (MCC)
Motor Control Centers (MCC) are a modular assembly which motor control units called buckets are installed, each bucket is intended to control a motor. It acts as a central switchgear panel for the control of multiple motors in an industrial facility.
Research and Commercial Greenhouses
Commercial and research greenhouses are enclosures dedicated to the botanical needs of plants. Commerical greenhouses produce plants for consumers, while research growth chambers are oriented towards plant science and pharmaceutical harvests.

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