#WishIknew – What’s HART-IP?

Field Network

When you have a question about process automation that needs a short answer, let us know with #WishIknew and @Visaya! We’ll reply with a #WishIknew post. It’ll give a quick explanation, then some related articles, videos, or reviews if you want to know more.

I wish I knew what HART-IP is!

HART-IP is one of a bunch of options to connect field devices to controllers using a TCP/IP medium. But let me give you more than that.

Industrial Ethernet scenario

Back in 2013, we had an interesting IMS Research study. It stated that in the process industry, the number of industrial Ethernets could almost double from 2011 to 2016. Were they right? I think so.

I don’t have those numbers, but we obviously have more projects using industrial Ethernet than before. On the other hand, we still have challenges to beat to make this number more relevant.

Image courtesy of bernardandcompany.com

Today, you’ll often find control systems and gateways connected using industrial Ethernet rather than serial communication. However, some field devices haven’t reached this point yet, often due to power-over-Ethernet issues for devices such as pressure or level transmitters.

You see, flow and analytic devices may use industrial Ethernet, but they require external power supplies.

Still, industrial Ethernet protocols offer pluses in communication speed, easy integration, protocol matching, and structure reduction compared to standard networks.


Released in 2012, HART-IP came out to simplify the integration of field devices into control systems. It didn’t need variable mapping, complicated setups, or other typical complications.

It was developed to work over standard Ethernet, the IEEE 802.3, through copper or fiber cables. Moreover, it can also work with Wi-Fi, based on the IEEE 802.11 standard.

Image courtesy of instrumentationtools.com

In general, HART-IP can work in a standard Ethernet network of routers, LAN switches, cables, and access points. It also can coexist with other IT systems and protocols in the same network, giving it more flexibility.

You can have different topologies as well, like mesh or ring. Its configurable speed allows it to support 10 megabits per second, 100 Mbit/sec, and one gigabit per second.

Today, you can find gateways using power-over-Ethernet (PoE) with HART-IP to save money on structure, with power supply and communication in the same cable.

WirelessHART and HART multiplexers

We have several ways to use HART-IP in industrial applications.  WirelessHART and HART multiplexers are good examples.

A wirelessHART network can support devices with built-in antennas for just wireless communication, or you can use an adapter to make standard devices wireless and collect data wirelessly.

WirelessHART gateways can support many protocols to provide seamless integration, and HART-IP is one of them. Additionally, you can use the HART OPC Server to collect data for the asset management software. Intelligent device management (IDM) also supports HART-IP.

HART multiplexers are a classic way to collect data for monitoring or configuration. These multiplexers support HART-IP in a smooth and seamless integration process.

Related tags: #WishIknew Basic Communication Protocol English Field Network HART HART-IP Principle Solution
#WishIknew - What's HART-IP?
#pAutomator: Stephen Puryear, Pharma Calibration Subject Matter Expert
Everything you need to know about Modbus protocols
Everything you need to know about Foundation Fieldbus
#pAutomator: Dave Korpi, take5inc.com and tacticalflowmeter.com
See related devices