The SF Series Voltage Input switch followers are a two-way system designed to provide a quick and cost-effective solution for a variety of wireless switching applications. The SF voltage input, switch “following” transmitter can be used for long range (3-mi.) wireless control of relays.  As a switch “follower”, the remote relays will “follow” the actions of a single or multiple remote input switches.  Different from a “remote control” system, these transmitters continuously transmit as long as voltage is applied at the input.

Each SF900C system has up to 8-inputs connected to a transmitter which control 8-outputs at the receiver. Designed to work in either pairs or one transmitter to several receivers, the output relay at the “receive” end of the wireless link will “follow” the input at the “transmit” end of the other unit. An optional “loopback” mode can be set for each channel separately. This will activate the corresponding relay at the TRANSMIT end confirming that the switch change was carried out at the receive end.

The inputs are opto-isolated and may be operated by an applied voltage that can be supplied by a power source from 5 to 24 Volts AC or DC through a switch contact, relay, sensor, PLC output etc.

These products utilize frequency hopping spread spectrum technology and are immune to interference and multi-path fading.  They will not cause interference with wi-fi networks.  Also available in outdoor NEMA IP-65 enclosure.