Define Normal Status of a Process Switch ?
Switches, whether they be hand-actuated or actuated by a physical process, come in two varieties: normally-open (NO) and normally-closed (NC). You are probably accustomed to seeing both types of switch...
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Process Switches and Alarms
Another type of instrument commonly seen in measurement and control systems is the process switches. The purpose of a switch is to turn on and off a device like heaters,...