# LOOP PPOWER, 44-220 mmA SSENSORS TECHNICAL IINFORMATION

1 Pages · 2007 · 98 KB · English

The purpose of the 4-20 mA analog current loop is to transmit the signal from an analog vibration sensor over a distance in the form of a current signal.

The purpose of the 420 mA analog current loop is to transmit the signal from an analog vibration sensor over a distance in the form of a current signal PRO’s loop power sensors output a 420 mA current that is proportional to the overall vibration of the equipment or machinery they are monitoring This output current has a range of 420 mA (4 mA normally representing the sensor’s zerolevel output, and 20 mA representing the sensor’s fullscale output) Only two wires are required to send the current signal and also supply power to the sensor A loop supply voltage is used to power the remote sensor The remote sensor regulates the loop current such that the loop current represents the value of the parameter being measured by the sensor A series resistor R Lat the loop power supply converts this current to a voltage that can be used by the process monitor/controller to record or distribute the parameter being measured Loop Power, 420 mA Output Vibration Sensors Typical Loop Powered Circuit Loop Resistance Calculations Maximum loop resistance can be calculated by: Standard Loop RL(max) = V power 15 V x (1 mA/001A) Powered Sensors 20 mA *Intrinsically Safe Loop RL(max) = V power 18 V x (1 mA/001A) Powered Sensors 20 mAPower Typical Typical Source R L(max) R L(max) Voltage (V p) (NonIS Sensors) (IS Sensors) 20 250 100 24 450 300 26 550 400 30 750 600 *Note:Typical Loop Powered Circuit will include an IS Barrier in the Circuit Sensor & Transmitter In One Standard Loop Powered SensorsLP200 or LP300 Series Intrinsically Safe Loop Powered SensorsLP800 or LP900 Series DAT10029 LOOP PPOWER, 44220 mmA SSENSORS TECHNICAL IINFORMATION PR9 LOOP POWER SENSORS TECHNICAL INFORMATION LIFETIME WARRANTY ON MATERIALS & WORKMANSHIP PLEASE SEE WEBSITE FOR DETAILS CAT706

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