RTA offers a variety of
ALLEN-BRADLEY LEGACY
communication solutions
The DF1 protocol, used by Allen-Bradley for so many years, is no longer supported by A-B. In fact, A-B no longer makes PLCs with serial ports. So, how are you going to connect an RS-232 cable from your computer to a decades-old PLC?
With Real Time Automation’s DF1 legacy gateways, that’s how!

Products That Keep Your Factory Floors Connected
RTA, the foremost authority on industrial communications, has a wide range of gateways that support DF1 communication, so users get a simple, easy-to-use connectivity solution to integrate their DF1 devices into other industrial protocol networks. And like all RTA products, our DF1 legacy gateways come with a 30-day, money back guarantee and a 5-year warranty. They’re also made in America, in stock and ready to ship the same day you order (before 2:00 pm Central). And if you need to replace your Allen-Bradley 1761-NET-AIC or 1761-NET-ENI, we have solutions for that, too.
ASCII to DF1 PLC
Easily connect serial devices to DF1-based Allen-Bradley PLCs
BACnet/IP Client to DF1 PLC
Easily map your legacy PLC data into a BACnet/IP client
BACnet/IP Server to DF1 PLC
Easily control up to 32 BACnet/IP server devices from a DF1 PLC
BACnet MS/TP Master to DF1 PLC
Easily map your legacy PLC data into a BACnet MS/TP master
BACnet MS/TP Slave to DF1 PLC
Easily control up to 32 BACnet MS/TPslave devices from a legacy DF1 PLC
DeviceNet Master to DF1 Device
Easily map your legacy PLC data into a DeviceNet master
DeviceNet Slave to DF1 PLC
Easily control up to 32 DeviceNet slave devices from a legacy Allen-Bradley DF1 PLC
EtherNet/IP Adapter to DF1 PLC
Easily connect EtherNet/IP devices to your legacy PLCs
EtherNet/IP Adapter I/O to DF1 PLC
Easily map your legacy PLC data to EtherNet/IP
EtherNet/IP-based A-B PLC to DF1 PLC
Easily connect data from your legacy PLC to Logix processors
EtherNet TCP/IP Socket Connection to DF1 PLC
Easily map your legacy PLC data to a TCP/IP socket
Modbus RTU Master to DF1 PLC
Easily connect your DF1 PLCs to a Modbus RTU master device
Modbus RTU Slave to DF1 PLC
Easily connect up to 32 Modbus RTU slave devices to a legacy Allen-Bradley PLC
Modbus TCP/IP Client to DF1 PLC
Easily make your legacy Allen-Bradley PLC act like a Modbus TCP device
Modbus TCP/IP Server to DF1 PLC
Easily connect Modbus TCP servers to DF1 PLCs
MQTT to DF1 PLC
Easily and securely connect DF1 slave data to cloud applications
Profinet IO Controller to DF1 PLC
Easily make your serial PLCs into PROFINET devices
Profibus Master to DF1 PLC
Easily make your legacy DF1 PLC appear as a Profibus slave device.
Siemens S7 PLC to DF1 PLC
Easily map your legacy serial PLCs data tables over to your Siemens S7 PLCs
USB Data to DF1 PLC
Easily connect USB devices to a DF1-based Allen-Bradley PLC
Web Interface to DF1 PLC
Easily map all of your legacy serial PLCs data tables over to your web server or client
Need to Replace Your Allen-Bradley 1761-NET-AIC or 1761-NET-ENI?
If you have a bunch of machines reliant on legacy PLCs and you’re looking to milk every last drop of functionality out of them, Real Time Automation has what you need. Our 515RTAAIC and 515RTAENI units, while not physically identical to the 1761 units, provide the functional replacements you need to make the transition from old to new as seamless as possible.
Features

SIMPLE SOLUTIONS
Our gateways are delivered ready for service. Only deal with the features and protocols you need for your application. No software licenses to buy! All the configuration is browser-based so there is no software!

EXPERT SUPPORT
When you call, a live person answers the phone. Our sales team gives you honest answers. Support is from an engineer, who had a hand in the product’s development, and doesn’t require a ticket or 24-hour wait.

ALWAYS IN STOCK & MADE IN THE USA
Orders ship same day if placed before 2 p.m. CST. No need to worry about stock or long lead times. Get your gateway when you need it to avoid down time and keep your projects moving.

5 YEAR WARRANTY
You won’t have to blame the dog for eating your gateway. We don’t care if you confuse the AC with DC power or if you run the unit over with a forklift. If you break it, we will fix it or replace it at no cost for five years.
What Our Customers Are Saying

I tried for several months to find someone who knew the older Allen-Bradley RB modules…. After almost a year of searching for help, RTA fixed our problem in a few short weeks.

The 435NBA is an excellent serial to EtherNet interface to an Allen-Bradley ControlLogix PLC. Great web interface makes it easy. We will be using more of these in the future.

All of us here are very big fans of RTA. It’s fantastic that we can count on a great product that works and comes with the best support.

I have been using RTA modules for the last four years and I have been extremely happy with their products and support. I really feel that this is one of the best gateway devices in the industrial realm.