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Waspmote 4-20 mA (Current Loop) Sensor Board

45 €45.00

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The 4-20 mA Current Loop Board is one of the most robust sensor signaling standard. Current loops are ideal for data transmission because of their inherent insensitivity to electrical noise. In a 4-20 mA current loop, all the signaling current flows through all components; the same current flows even if the wire terminations are less than perfect. All the components in the loop drop voltage due to the signaling current flowing through them. The signaling current is not affected by these voltage drops as long as the power supply voltage is greater than the sum of the voltage drops around the loop at the maximum signaling current of 20 mA.

Transmitting sensor information via a current loop is particularly useful when the information has to be sent to a remote location over long distances (500 meters, or more). The loop operation is straightforward: a sensor output voltage is first converted to a proportional current, with 4 mA normally representing the sensor zero-level output, and 20 mA representing the sensor full-scale output. Then, a receiver at the remote end converts the 4-20 mA current back into a voltage which in turn can be further processed by a computer or display module.

4-20 mA Current Loop
Type Analog
Media Twisted pair
No. of channels 4
Distance 900 m
Supply 5-24V

Applications:

  • - Sensors and Instruments
  • - Remote transducers
  • - Monitoring processes
  • - Data transmission in industrial ambients

Documentation:
Waspmote Quick Tutorial
Waspmote Site 
Waspmote Technical Guides 
Sensor Boards Technical Guides 
Networking Guides 
Developers Forum 
Videos 
Articles 
50 Applications with Waspmote 
FAQ: Waspmote Vs. Arduino

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Description

The 4-20 mA Current Loop Board is one of the most robust sensor signaling standard. Current loops are ideal for data transmission because of their inherent insensitivity to electrical noise. In a 4-20 mA current loop, all the signaling current flows through all components; the same current flows even if the wire terminations are less than perfect. All the components in the loop drop voltage due to the signaling current flowing through them. The signaling current is not affected by these voltage drops as long as the power supply voltage is greater than the sum of the voltage drops around the loop at the maximum signaling current of 20 mA.

Transmitting sensor information via a current loop is particularly useful when the information has to be sent to a remote location over long distances (500 meters, or more). The loop operation is straightforward: a sensor output voltage is first converted to a proportional current, with 4 mA normally representing the sensor zero-level output, and 20 mA representing the sensor full-scale output. Then, a receiver at the remote end converts the 4-20 mA current back into a voltage which in turn can be further processed by a computer or display module.

4-20 mA Current Loop
Type Analog
Media Twisted pair
No. of channels 4
Distance 900 m
Supply 5-24V

Applications:

  • - Sensors and Instruments
  • - Remote transducers
  • - Monitoring processes
  • - Data transmission in industrial ambients

Documentation:
Waspmote Quick Tutorial
Waspmote Site 
Waspmote Technical Guides 
Sensor Boards Technical Guides 
Networking Guides 
Developers Forum 
Videos 
Articles 
50 Applications with Waspmote 
FAQ: Waspmote Vs. Arduino

If you are interested in Internet of Things (IoT) or M2M projects check our open source sensor platform Waspmote which counts with more than 100 sensors available to use 'off the shelf', a complete API with hundreds of ready to use codes and a low consumption mode of just 0.7µA to ensure years of battery life.

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