RH1 & R21 433.92MHz Single-Channel Wireless Relay Kit

The RH1 & R21 kit combines a two-button handheld transmitter with a single-channel relay receiver for local wireless switching. It is a practical option when an operator needs to control a compatible light, low-voltage device or equipment control circuit without running a cable to the handheld control point.

One relay output with flexible contact wiring

The receiver provides normally open, common and normally closed terminals, marked NO, COM and NC. These contacts let an installer choose the appropriate switching arrangement for the connected circuit. The enclosure also identifies the power terminals as GND and V+, and an LED provides a visible status reference.

• Single relay channel with NO, COM and NC connections.

• Two clearly marked A/B buttons on the handheld transmitter.

• Learning-code pairing between compatible transmitter and receiver.

• Plastic receiver housing with accessible screw terminals.

Wide low-voltage supply compatibility

The receiver is marked for AC or DC 12–48V input. Match the actual supply and terminal wiring to the unit supplied before installation. The receiver supply rating describes the power needed by the control electronics; it should be considered separately from the voltage and current of the circuit switched through the relay.

Choose the frequency and installed range

The illustrated kit uses 433.92MHz, while the listing also offers a 315MHz selection. Specify the required version when ordering and pair components with matching frequency and code compatibility. The product illustration gives an open-area distance of 50–100 metres. Building walls, metal enclosures, antenna placement and interference can shorten the usable range, so verify operation in the intended location.

Suitable for lighting and equipment switching

Use the kit to add handheld switching to compatible lighting, automation circuits and equipment controls. The relay is marked with a maximum current of 10A, but the allowable load depends on switching voltage and load type. Motors, pumps and other inductive loads can draw a high starting current; where needed, use the relay to operate a correctly rated contactor.

• Confirm receiver supply voltage and the RF version.

• Check the load voltage, running current and starting current.

• Confirm the required A/B button behavior and relay operating mode before ordering.

• Pair and test the kit at the installation site before putting the equipment into service.

A matched kit for your application

The handheld transmitter uses a 9V battery supply and is listed in white or black. Share the equipment type, available supply, load details and desired switching behavior with ANRIVERS so the receiver and transmitter configuration can be checked for your application.