RK318 4-Channel 433MHz Wireless Relay Control Kit

The RK318 brings four relay control channels to a handheld 433MHz wireless remote. It pairs a four-button transmitter with a learning-code receiver for switching irrigation equipment, solenoid valves, lighting and other compatible electrical loads without running a control cable to the operator.

Four relay channels for equipment control

Each channel has normally open, normally closed and common terminals, giving installers flexibility when connecting a load or a control circuit. The receiver uses ASK radio communication and includes a learning key for pairing compatible transmitters. The handheld remote has numbered buttons and an LED indicator for clear operation.

• Four relay outputs with NO, NC and COM terminals.

• Four-button handheld transmitter with 9V battery supply.

• Learning-code pairing and an external receiver antenna.

• Plastic receiver enclosure with mounting tabs.

Choose the receiver supply for your installation

The listing offers separate AC100–240V and DC12–36V receiver versions. Select the version that matches the available supply before ordering; the two voltage ranges describe different variants. The illustrated AC receiver measures approximately 95 × 68 × 28 mm.

Practical use for pumps and solenoid valves

The kit can provide local wireless switching for agricultural irrigation, pump control panels, valve circuits and equipment lighting. For a motor or pump whose starting current exceeds the relay capability, use the receiver to operate a suitably rated contactor rather than switching the motor directly. Match the wiring arrangement to the selected receiver version and the load.

Plan the radio link and load connection

The source lists a control distance of 100 metres. Walls, metal cabinets, antenna position and local interference can reduce usable range, so check operation at the intended installation site. The relay is marked 10A; allowable switching capacity depends on voltage and load type, particularly with inductive loads.

• Confirm the required supply version and operating frequency.

• Check load current, starting current and the need for a contactor.

• Confirm the required relay behavior and transmitter pairing before commissioning.

• Test the installed radio link and retain suitable local isolation and equipment protection.

For a matched control kit, share the equipment type, supply voltage, load details and required operating behavior with ANRIVERS.