Expert’s answer: What’s the difference between a HART and SMART device?

There’s no difference whatsoever between a HART and SMART device! My work here is done. Or not. Big Boss says talk more. Right.

Okay, people often compare a HART device to an FF or PROFIBUS device, which is a little unfair, if you ask me. The HART provides intelligent device management (IDM), but the control system just reads the device’s output. Now FF and PROFIBUS also provide IDM, but the system reads the diagnostics and process values directly.

It’s like asking two mechanics what’s wrong with your car. One says, “Brakes.” The other says, “You have 5 millimeters left on your front disc pads, so you should replace them.” Yeah, the first guy is terse, but he’ll get the job done. Get the picture?

HART communication HART and SMART
Example of multiplexer installation

You can find a bunch of solutions that’ll catch the data from the HART field devices. Of course, you gotta keep an eye on the wallet.

A wireless setup can do the job for fewer bucks than an old-schooler like a multiplexer. In some cases, you can replace old analog cards with new HART cards. Go fish! Either way, you’ll reap the same benefits. You need to pick the option that’ll be easiest and cheapest for you.

Wireless adapter
Example of wirelessHART network with wirelessHART adapters

Make sure you ask the tough questions! Will your system take an upgrade? Can the plant plod into the 21st century with digital communication? Stuff like that.

Wireless and HART solutions:

Other resources that might interest you

Handheld and HART
Should I always have a 250-ohm resistor to use the handheld communicator with a HART device?

HART theory
Could you explain how it’s possible to send a digital communication through an analog signal?

Field Communicator and the SMART Meter verification
Can I have the SMART meter verification using my field communicator? I have this option to verify my flow meter and typically I do using the display, now I would like to test the field communicator with the SMART meter verification.

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