Question from customer:
I am looking for a long range relay to control a water pump. The water pump now is controlled by a float switch (on/off) at the reservoir 800 meters away. I have 120 volts at both locations and a relay to start pump.
Answer:
We recommend the 2000m rf AC receiver (S1PUA-AC220-ANT2) and the long range transmitter CB-2N. The receiver is soldered with external extended antenna, which can make its transmission distance at 2000m/6000ft theoretically. It works between AC 100~240V voltage. The maximum working current is 30amps. There are 315Mhz or 433Mhz at your option. The transmitter is special designed because its triggered method is connection and disconnection of two wires. When two wires are connected, the transmitter is triggered and then transmits an rf signal “ON”. When two wires are disconnected, the transmitter is triggered and then transmits an rf signal “OFF”.
The wiring method of your water pump will be talked next.
A, B terminals are normally open; A, C terminals are normally closed. Wire Water pump motor to A terminal and N terminal. Add wire to connect B&L terminals. Supply AC 100~240V power to receiver. Connect two wires of transmitter to relay you mentioned.
Usage:
When two wires of transmitter are connected, the transmitter is triggered and then transmits rf signal “ON”; When the receiver accepts the signal, it will make water pump work.
When two wires of transmitter are disconnected, the transmitter is triggered and then transmits an rf signal “OFF”. When the receiver accepts the signal, it will stop water pump.
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