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AprilAire Protocol Adapter, RS232-to-RS485

SKU: RP8811

Order now and we'll ship same business day (if ordered before 3 pm PST).


WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov


Communicates Directly With 8870 Thermostats

An 8811 protocol adapter is a must in everyone's tool box. With this RS232-to-RS485 adapter, you can communicate directly with the AprilAire 8870 thermostats saving hours in troubleshooting time. The AprilAire 8811 Protocol Adapter converts RS422/485 to RS232 for communication with your laptop and terminal program or home automation system.

  • Includes 7.5VAC, 500MA power supply
  • Converts RS2332 to RS485
  • DB9 connector and cable included

The Automated Home

You've probably heard about computers running factories and businesses. Well, with the technology advances today, we're able to run our homes too. At a basic level, home automation is connecting your home's security, audio/video and lighting to one central computer, sometimes called a system controller. Home automation eliminates the need to continually set and reset multiple thermostats located throughout a building or home. Like with lighting and security, it lets homeowners monitor, set, and control all indoor heating and cooling functions from that same centralized location. The Communicating Thermostat is the unit that talks to the centralized or home computer to maintain the comfort throughout large homes with the advantage of seeing and changing all the thermostats from one location. Any structure that has three or more thermostats or uses multiple heating and air conditioning units can benefit from the convenience of HVAC Automation.


  • Manufacturer Part #: 8811
  • UPC: 686720881107
  • Warranty: 5-Year