Control in the field with WirelessHart
While the first applications of wireless technology were limited to simply monitoring processes, now WirelessHart can be integrated into the regulating process for controlling ball valves, fans, and other mechanical devices. The discrete WirelessHart I/O field device from Pepperl+Fuchs can capture digital input signals and switch digital outputs up to zone 1. Namur sensors or mechanical switches are used to determine the direction of rotation and monitor the frequency of an engine or the fill level of a tank using limit value switches. What’s more, it is possible to monitor the position of valves intelligently by measuring the breakaway time and runtime of each opening and closing process that the valve performs. In this way, blocked valves can be detected simply by measuring time. Depending on the version of the four wireless field devices, equipment such as valve position controllers, low-power piezo valves, motor switches, and pumps can be switched on or off via the outputs. While the inputs and outputs are hardwired, the communication with the control station is wireless, as is the case with all WirelessHart devices. By providing the power supply via the long-life battery of the discrete I/O device, it is possible to ensure that the actuators and sensors are installed independently of the power supply.
www.cpp-net.com search: cpp0315pepperlfuchs
Share:
