M1144
8Pages

These simple application boards constitute a bidirectional Mesh networked remote control system. Each board has 1-input, 1-output, a 4-bit global address and a 4-bit Unit ID (hence "M1144"). A complete system consists of a master board (which initiates communication burst cycles) and up to 15 slave units. Any input activation on any slave (or the master) closes the relays on all units on the system. This makes the M1144 an ideal platform for an alarm system. Features ■ 4-bit Global address, 4-bit Slave Unit ID selectable via 8-way DIP switch ■ 1 Master, 15 Slave Units per site ■ Unlimited number of drone receiver/decoders ■ Usable with any BiM footprint radios (up to 100mW) with a switching & settling time of <10ms ■ 5VDC 44mA or 12VDC 18mA relay to control devices rated up to 8A 250VAC or 5A 30VDC ■ Alarm response time <1s to 16s (worst case for whole network) ■ Frame synchronisation codes, check sums and address are used to prevent false triggering ■ 3.6kbps bi-phase data packet encodes the alarm status and presence of each slave unit on the network ■ 1.65% (132ms in 8s) Transmit Duty Cycle per slave unit ■ 8.8% (704ms in 8s) Maximum Radio Channel Occupancy per system ■ Visual LED indication of communication status and relay state ■ 4-times greater operating radius compared to a point-to-point system, using the same radio module ■ Logic or Switch input for momentary control of relay ■ 3.5mA average current (e.g. 34 weeks operating life from 6xD cells) ■ Simple “plug-and-play” setup. No complex programming needed Applications ■ Security and Alarm systems ■ Emergency assistance call system ■ Status reporting and monitoring systems ■ RF Remote control systems ■ Industrial controls Kit Contents The M1144 Application kit is supplied with the following contents: 1 M1144 Encoder/Decoder Master board 1 M1144 Encoder/Decoder Slave board 2 Radiometrix Transceiver module (ordered separately) 2 1/4-wavelength UHF monopole or VHF helical antennas depending on module frequency Additional requirement ■ External DC power supply

M1144 controller and application board M1144 allows a network which is star based but 4-hops in all directions to enable a network which is 4 times as large as a standard simple star network. The boards are the same for both master and slave, it is just the M1444 firmware which is different for a master or a slave. Common features and characteristics of the M1144 boards Radiometrix Ltd M1144 Application Boards page 2

Radiometrix Ltd M1144 Application Boards page 3

Operational Description In an M1144 system, timing is everything. Data is only transmitted in carefully defined and synchronised timing "slots". The primary reference for this timing is generated by the Master unit, and is received (and re-sent) by the slave units to provide a consistent time reference across the whole network. A slave unit without valid synchronisation cannot transmit. The diagram (below) shows how the system timings are arranged. 50ms long Slot Burst Returning Reply Frames Outgoing Synchronisation Frames The basic timing element is a 50ms "slot" (into which a single...

ML1144 timings and battery consumption The battery consumption is very important in this system and the synchronising system used allows the units to maximise battery life. For example, take the worst case, zone 2 or 3 radio, identity number 15. Idle current is approximately 100μA at 4.65 seconds in every 8 second group TX contribution: 750ms at 2.4mA (processing) 44ms TX actually ON, at 29mA three times over RX contribution: 850ms at 9mA (main listen) 100ms at 12mA (sync listen, LED on) In worst case sync (receiving a sync from a zone 2 unit with slave ID of 14) the sync listen...

systems with the OD28 board for indication purposes. The OD28 allows the user to see units present and alarm states in the form of LED indicators. Figure 5: M1144 Application Board Schematics

Ordering Information Note: For details relating to the radio module fitted on board, see relevant data sheet http://www.radiometrix.com/files/additional/bim1.pdf http://www.radiometrix.com/files/additional/nim2b.pdf Frequencies and options The mater and slave units can take any of the Radiometrix 10mW-100mW VHF/UHF transceiver units which have a BiM footprint and switching and settling time of less than 10ms, thereby offering a number of frequency and power options. Call sales on +44 20 8909 9595 to see what frequencies and power levels are available in your country. Radiometrix Ltd M1144...

Copyright notice This product data sheet is the original work and copyrighted property of Radiometrix Ltd. Reproduction in whole or in part must give clear acknowledgement to the copyright owner. Limitation of liability The information furnished by Radiometrix Ltd is believed to be accurate and reliable. Radiometrix Ltd reserves the right to make changes or improvements in the design, specification or manufacture of its subassembly products without notice. Radiometrix Ltd does not assume any liability arising from the application or use of any product or circuit described herein, nor for...