Danfoss RX3 Three channel receiver works with 3 wireless thermostats types: RT51-RF, RT52-RF, TP5000-RF, TP7000-RF, RET B-RF, CET B-RF, WP75-RF.  

• Ideal for use in situations where it is impractical to run wiring between the thermostat location and other controls in the system.
• Using secure digital radio communication, the thermostats communicate with an RX receiver unit, which can be mounted up to 30 metres away from the thermostat. The thermostats, all of which are battery powered, each have their own unique digital identity code, which is learnt by the RX receiver unit during commissioning. Receivers are available in 1, 2 or 3 channel versions, making them ideally suited to zoning applications. A two-zone receiver with a shared output heat demand relay is available for use where a common output is required for the control of a pump or boiler.
• Danfoss RX3 Wiring Diagram
• Danfoss RX3 User Instructions