3181 - 10-channel Rolling Code UHF Remote Control Relay

10 channel high security (rolling-code) UHF remote control relay board for use in a variety of applications. One receiver board can be used with up to 15 transmitter key fobs making it ideal for a multi-user access or control system.

Whether you want to control a garage door or gate, a car and/or home alarm, or perhaps remotely turn lights or anything else on or off, this system is just what you're looking for!

• Rolling-code security (as used for vehicle security systems) is almost impossible to electronically 'crack'
• Each of the ten channels can be set to either latching or momentary operation so it's extremely versatile
• Long 40 metre range (line of sight)
• The key fob transmitter and UHF receiver module are both pre-built
• Up-to 15 key fob transmitters (Tx) can be used with one receiver board (one key fob transmitter is included as standard)

If you read the technical documentation the following key press combinations give readable outputs: pins 1, 2, 3, and 4 (of course) and the pins 1&2, 1&3, 1&4, 2&3, 2&4, and 3&4 pressed together. A PIC16F628 does ALL the work. It is a perfect demonstration of how micro-controllers have taken over from CMOS logic etc. The PIC source code is provided.

Unit starts in Momentary Mode for all relays but can be changed to Toggle Mode by holding the button or keypress combination depressed for more than 2 seconds. That relay will stay in that mode until another >2 sec keypress is received (NB a firmware upgrade is available that changes this arrangement - click here for details). Small relays are used to save weight and board area.

The kit is supplied with all the components to build one complete 10 channel relay board (as pictured). One ready built 4-button keyring transmitter (with battery) is also supplied but up to 15 transmitter units can be learnt by one Rx unit. Extra transmitter units can be purchased separately (Order Code 30A16-Tx).

Technical Specifications
Relay Receiver Board
Supply	Regulated 12Vdc (Order Code PSU445 with connector 778.106)
Current consumption	Standby <8mA. Add approx 30mA for each active relay
Output	10 x SPDT Relays
Maximum Output Load	1 Amp @ 50Vac per relay (Relay Datasheet)
Relay Connections	C, NO, NC (Relay FAQ)
Dimensions	113 x 85 x 25 mm approx
Connections	Solder pads for relay connections but ..... Board will accept screw terminal blocks but these must be supplied by the purchaser unless the AS3181T version is purchased
Key Fob Transmitter
Supply	12Vdc battery (supplied)
Dimensions	50 x 35 x 15 mm approx
Product Format	Electronic Kit (KT ) or Assembled (AS) more
Documentation	User Manual 3181B Firmware Upgrade Documentation

• The transmitter / receiver modules used in this kit are also available separately (Order Code 30A16)
• A pre-programmed microcontroller with the 3181B version firmware can be purchased from our Firmware Chips page