HART devices and power supply

Data Acquisition Field Network Q&A

Hi. I have another question about HART communicators and devices. The question is: should we feed 24 VDC to a HART device only through a PLC/DCS or can we do it with an external power supply?

Expert’s Answer: HART Devices and Power Supply

Hi there! I can explain, this is a pretty straightforward case of HART devices and power supply. In most cases, you can supply power to a HART device through the programmable logic controller (PLC) or a distributed control system (DCS). However, some controllers and systems can use a separate power supply to create the current loop. So, it fully depends on your structure.

For more information about HART, please visit www.hartcomm.org.

For more information on the topic, please check with these websites:

Hope it helped!

Other resources that might interest you

Can a converter or a gateway connect a HART device in a FOUNDATION Fieldbus network without data loss? Or should we opt for a HART? 

How to use a handheld and HART together 
Do you need a 250-ohm resistor to use the handheld communicator with a HART device?

HART Communicator: When to Use
If we have a local configuration, when do we use the HART communicator?

HART advantages
Which type of field network protocol do we use in a new plant? Can we set up a HART network instead of a PB or FF network? 

Related tags: DCS Field Device HART HART communication PLC
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