We live in an era where digitalization is key for companies to improve production and keep themselves competitive. However, although the market has many types of field network, most field devices still run on analog, and most have the HART communication protocol
If you are reading this, you probably have a HART communicator and a pressure transmitter and you are wondering how to connect them. Don’t worry, you are only minutes away from the answers you seek.
Pressure transmitters usually use current loops for power. That means that you have 24 volts of direct current (VDC) in the same loop where you have 4-20 mA and HART. Now, to send data with the device in the workshop, you need a 24-VDC power supply, a 250-ohm resistor, and a handheld. Look at the diagram below to see how to install the device and connect the handheld.
In the field, you shouldn’t need the resistor because your cable resistance should suffice. But if it’s not enough for some reason, just use the same setup you had in the workshop.
Since the new techonolgies allow to connect a HART device through Bluetooth with special HART modems. We also recommend you to use a windows or Android device to connect to your device and configure it avoiding a more complex installation with wires.
For more information about HART, please go to www. hartcomm.org.
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