iO Wireless Relay
iO Wireless Relay
Item # iO-WR
Alternate Item # WR-400

*Due to the chip shortage, we are currently out of stock. All orders placed will ship when we receive more inventory from iO HVAC Controls.

Formerly the WR-400

The iO-WR Wireless Relay Kit allows you to wirelessly control hundreds of applications. The iO-WR realy can energize a relay up to 100'  depending on the construction of the building. A limitless number of Wireless Relay Kits can be installed in the same building.

The Wireless Relay Kit contains two 4-channel transceivers. The base module has 3 transmitting channels and 1 receiving channel. The satellite module has 3 receiving channels and 1 transmitting channel. Each transceiver module uses a redundant transmission protocol for fail-safe protection. If either module does not receive a valid ON or OFF transmission signal within 60 seconds, the output or outputs will be turned off.

Features and Benefits
  • Can control or monitor the following:
    • Cooling equipment
    • Heating equipment
    • Condensing units
    • Fans
    • Pumps
    • Lighting
    • Industrial equipment
  • Satellite Transceiver can be mounted outdoors 
  • Built-in signal strength indicator
  • 1-year warranty



Product Specifications
Base Module Dimensions
5.125” x 2.625” x 1.125 (WHD)
Base Module Input Voltage
Satellite Module Dimensions
5.125” x 2.625” x 1.125” (WHD)
Satellite Module Input Voltage
Base - 3 transmit/1 receive
Satellite – 1 transmit/3 receive
Contact Rating
1A per channel
Communications Protocol
915MHz proprietary protocol
Communications Range
Up to 100’ depending on the building type


Wireless Relay Extended Range - Overview

Wireless Relay Extended Range - Overview


Wireless Relay Overview

Wireless Relay Overview


How to Wire the Extended Range Wireless Relay

How to Wire the Extended Range Wireless Relay


Wireless Relay Training

Wireless Relay Training


5418 Elmwood Ave | Indianapolis IN 46203 | 888-652-9663