Speed monitor works in hazardous locations
The multimodul MK21 features intrinsically safe input circuits, monitors pulse sequences from NAMUR sensors in hazardous locations, and indicates both over and underspeed conditions to control equipment in nonhazardous locations. A yellow LED indicates the relay switching status. An LCD display on the front shows actual speed, measured in user defined units. The product can monitor the input circuit for wire-break and/or short circuit.