From the course: Input Sensors with PLC: 4-20 mA Current Loop
Unlock the full course today
Join today to access over 24,500 courses taught by industry experts.
Industrial transmitters overview
From the course: Input Sensors with PLC: 4-20 mA Current Loop
Industrial transmitters overview
- [Instructor] Transmitters are devices used to take the values produced by the sensors and convert that into an electrical signal, like 4 to 20 milliamps or 1 to 5 volts, for example. Transmitters produce values that are proportional to the parameters being measured. Here's an illustration of having a level sensor with a transmitter, showing that the 4 to 20 milliamps represents 0 to 100% of the level measured. Transmitters are actually separate devices from the industrial sensors. Industrial sensors can produce various types of output signals depending on the sensor type. For example, thermocouples produce millivolts, RTDs produce resistant values, ultrasonic distance sensors produce voltage values, vibration level sensors output a frequency in hertz, et cetera. So in order to have a standardized output, that makes it easier to interpret the readings, the role of transmitter is to take these values and convert that into…
Contents
-
-
-
(Locked)
Introduction to the 4-20 mA loop2m 41s
-
(Locked)
Industrial 4-20 mA current loop basics2m
-
(Locked)
Industrial 4-20 mA current loop components3m 11s
-
(Locked)
Industrial transmitters overview4m 22s
-
(Locked)
Optional: Calculating mA current reading3m 51s
-
(Locked)
Example: Wiring a temperature sensor to the PLC2m 55s
-
(Locked)
Why start from 4 mA instead of 0 mA?1m 41s
-
(Locked)
Why choose 4 mA instead of 10 mA?2m 12s
-
(Locked)
Load resistor in a 4-20 mA current loop3m 36s
-
(Locked)
-