https://processcontrolsolutions.com
(800) 462-5769
With decades of experience supporting fluid power, flow control, instrumentation and control system needs, Process Control Solutions is pleased to present this blog as a means to share information about interesting control applications, innovative new products, and fundamental process control concepts.
For more information, visit ProcessControlSolutions.com or call (800) 462-5769.
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| EIM TEC2 Electric Actuator |
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| Next time you have a tough process control challenge, call your local process equipment Sales Engineer. |
In certain industries such as chemical and power generation, safety systems are typically implemented to mitigate a disastrous event if control and other systems fail. In addition, to guard against both physical attack and system failure, organizations may establish back-up control centers that include uninterruptible power supplies and backup generators.
A control system typically consists of a “master” or central supervisory control and monitoring station consisting of one or more human-machine interfaces where an operator can view status information about the remote sites and issue commands directly to the system. Typically, this station is located at a main site along with application servers and an engineering workstation that is used to configure and troubleshoot the other control system components. The supervisory control and monitoring station is typically connected to local controller stations through a hard- wired network or to remote controller stations through a communications network—which could be the Internet, a public switched telephone network, or a cable or wireless (e.g. radio, microwave, or Wi-Fi4) network. Each controller station has a Remote Terminal Unit (RTU), a Programmable Logic Controller (PLC), DCS controller, or other controller that communicates with the supervisory control and monitoring station. The controller stations also include sensors and control equipment that connect directly with the working components of the infrastructure—for example, pipelines, water towers, and power lines. The sensor takes readings from the infrastructure equipment—such as water or pressure levels, electrical voltage or current—and sends a message to the controller.
The controller may be programmed to determine a course of action and send a message to the control equipment instructing it what to do—for example, to turn off a valve or dispense a chemical. If the controller is not programmed to determine a course of action, the controller communicates with the supervisory control and monitoring station before sending a command back to the control equipment. The control system also can be programmed to issue alarms back to the operator when certain conditions are detected. Handheld devices, such as personal digital assistants, can be used to locally monitor controller stations. Experts report that technologies in controller stations are becoming more intelligent and automated and communicate with the supervisory central monitoring and control station less frequently, requiring less human intervention.
The Numatics 503 Valve series provides higher flow and higher reliability in one versatile valve platform. The 503 Series is available in dual 3-Way and 4-Way solenoid air pilot actuated valves. They are available with manifold or individual base mountings, proprietary or ISO 15407. Numatics 503 series valves are compatible with the Numatics G3 Fieldbus Electronics Platform.![]() |
| EIM electric actuator. |