Radiometrix M1144-173.225-BiM1-M Mesh networked alarm control system Datasheet

Hartcran House, 231 Kenton Lane, Harrow, Middlesex, HA3 8RP, England
Tel: +44 (0) 20 8909 9595, Fax: +44 (0) 20 8909 2233, www.radiometrix.com
M1144
Issue 1, 4 December 2014
Mesh Networked Alarm Control System
These simple application boards constitute a
bidirectional Mesh networked remote control
system. Each board has 1-input, 1-output, a 4bit 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.
Figure 1: M1144 application boards
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
1
2
2
M1144 Encoder/Decoder Master board
M1144 Encoder/Decoder Slave board
Radiometrix Transceiver module (ordered separately)
1/4-wavelength UHF monopole or VHF helical antennas depending on module frequency
Additional requirement
 External DC power supply
Radiometrix Ltd
M1144 Application Boards
page 1
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
Interfaces
Relay Output (RLA1)
JP1
JP5
JP7
Input
JP2
RF
8A 250VAC rated SPDT change-over relay (5V or 12V coils to order)
3.81mm pitch 3-way 2 part "Phoenix" type terminal (COM NC NO)
Open Drain switch instead of relay (optional)
4 pin ancillary connector (+5V, AUX1, AUX2, GND)
Active low logic input. Pull-up to 5V, and protection diodes provided
3.81mm pitch 2-way 2 part "Phoenix" type terminal):
Compatible with Normally Open (NO) Volt-Free Closing Contact
No Jumper – Default OD28 binary serial output mode
Jumper fitted - ASCII diagnostic stream
Unused
8-way DIP Switches
Bits 7-4 Global Address
Bits 3-0 Sending Unit Local ID
12VDC and 5VDC versions available
3.81mm pitch 2 way 2 part "Phoenix" type terminal
40mA peak (plus 18mA/44mA relay coil current if activated)
3.5mA average current (relay off, using 10mW BiM1-173.225-10)
Right-angled SMA or MCX socket (or optional terminal block)
Indicators
D1
D2, D3
Relay state Red LED
Communication Link Status Red LEDs
JP4
JP4A
S1
Power
JP3
M1144 control chip
28-pin PIC16F883-I/SP
Extreme current saving
measures
Clock
Timer 1
Data rate
Addressing
10MHz (ceramic resonator)
32.768kHz watch crystal
3.6kbps Biphase coded burst
User selectable 4-bit Global Address
User selectable 4-bit Sending Unit Local ID
Response time <1s to 16s (worst case for whole network)
Switchable pull-ups on DIP switch
Very low quiescent current 5V 100mA/250mA LDO linear regulator
Size
76 x 63 x 16mm (excluding connectors)
(four 3.3mm diameter mounting holes are provided)
Operating temperature
-20ºC to +70ºC (some radios may be limited to -10ºC to +55ºC)
(Storage
-30ºC to +70ºC)
Radio modules
Compatible BiM pinout transceiver
10mW BiM1-173.225-10 (UK)
100mW BiM1-151.300-10 (Australia)
10mW NiM2B-434.650-10 (EU)
25mW NiM2B-458.700-10-25mW (UK)
5mW BiM3G-869.85-10 (EU)
Not compatible with RDL2 or 500mW BiM3H or BiM1H due to 10ms
preamble transmission and regulator current limitations
Radiometrix Ltd
M1144 Application Boards
page 2
LED Indications
Master LEDs
D1 (bottom)
D2 (left)
D3 (right)
In Lock
Relay Activated
Short Blink
Regular Long Blink
Slave LEDs
D1 (bottom)
D2 (left)
D3 (right)
In Lock
Relay Activated
Short Blinks
Various Blinks
Drone LEDs
D1 (bottom)
D2 (left)
D3 (right)
In Lock
Relay Activated
Very Short Blink
Long ON/OFF Cycle
No Comms
OFF
Regular Blink
No Comms
OFF
Constant ON
No Comms
OFF
Constant ON
Figure 2: M1144 Board Component Layout
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.
Preamble
Slot
15
Slot
14
Frame 7
Framing
Sequence
Slot
13
Slot
12
Checksum
Slot
11
Slot
10
50ms long Slot Burst
Address
Unit ID
1s long Frame
Slot Slot Slot Slot
9
8
7
6
800ms long Slots
Slot
5
Alarm
Slot
4
Slot
3
Slot
2
Status
Slot
1
Slot Dead
0
Time
200ms
8s long Group
Frame 6
Frame 5
Frame 4
Frame 3
Frame 2
Frame 1
Frame 0
Returning Reply Frames
Outgoing Synchronisation Frames
Figure 3: M1144 Synchronised data burst slots of each slave and frame transmission in a group
The basic timing element is a 50ms "slot" (into which a single transmission packet fits, with some
margin for error). 16 slots (and 200ms of inactive dead-time) make an 800ms frame. Each slot in a
frame is assigned to a specific slave unit ID number. A unit can only ever transmit in its assigned slot.
(slot zero is never used)
Eight frames make up an 8 second group, although it is easier to consider the first four
"synchronisation" frames and the second four "reply" frames as almost separate things.
Imagine a system starting from "cold":
In the first frame (zero), the master sends out a synchronising message. This sets the timing "clock" for
all slaves in range (these units we refer to as "zone 1 units". In frame one, all these units re-transmit a
sync message. Units receiving any of these frame 1 messages, but out of range of the master, are the
"zone 2" units
In frame two, the zone two units transmit, and are heard by units further out (out of rnage of both
master and zone 1 slaves), which constitute zone three. Finally, in frame three the zone three slaves
themselves transmit, to the furthest distant units, in zone four.
Zone four units do not transmit a sync message. They wait until frame four and transmit the first
generation of "reply" messages, which are received by the zone three slaves. In frame five, these units
transmit their reply message to zone two, which then transmit to zone 1 in frame six, and finally in
frame seven the zone 1 units transmit to the master.
In this way, you can see that transmitted data radiates outwards (like the ripples in a pond) in frames
0-3, and "bounces back" inwards in frames 4-7.
Reply message bursts carry alarm, and "unit present on system" information from the network back to
the master. On re-sending a reply burst, each slave unit adds its own information to the message
Synchronisation messages carry timing information out through the network, but also contain the sum
of all the network alarm and status information as received by the master in the previous frame. This
is critically important, as the previous-frame network data contained in the synchronising messages
allows every unit (slave, drone or master) to act on any alarm input, and allows every unit to output the
same serial data on its auxiliary port
Radiometrix Ltd
M1144 Application Boards
page 4
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
= 0.06mA contribution
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)
= 1.197mA
= 2.36mA
In worst case sync (receiving a sync from a zone 2 unit with slave ID of 14) the sync listen contribution
alone rises by 0.9mA, giving us 3.26mA total current.
So an average current would be around 3.5mA.
3.5mA on 20Ah Alkaline battery (6 x D) will last 5700 hours: which is 34 weeks (over eight months)
(A PP3 battery will run the unit for a week)
Response time
Alarm "on" activation is faster than "alarm off" (for obvious safety reasons).
Whenever a unit receives either a sync or reply message with any alarm state bit set, it will enter the
"alarm on" state and activate its relay. This means that when a unit is activated, the closest units to it
(the ones in range) will go into alarm mode as soon as they receive its transmitted message. This will
occur within one group, and possibly within the same frame if the activation precedes the unit's slot.
This is the fastest possible response time for the system. Generally the worst case should be considered:
the time for a unit in zone 4 to alarm in response to the activation of another zone 4 unit, on the "other
side" of the network.
In this case, the data bit must propagate in to the master (4 frames) and out again (4 frames): 8
seconds, but to this we must add the even worse situation, that the activation occurs just after the unit's
assigned slot: in this case a whole group will tick past before the activated unit will get to transmit its
"new" data ... so 16 seconds will elapse.
Setting
These units are supplied in "slave" and "master" varieties.
To maximise operating area, the master should be located in the middle of the site.
The high order 4 DIP switch bits are the 4 bit global (site) address. This must be the same on all units
in a system.
Each unit on system must have a unique number.
The local ID on a master should be set at 0000
Local Slave ID numbers (low order DIP switch) must be set between 1 and 15.
Local ID of zero on a slave unit is a special case, turning the unit into a "drone"
A drone listens but does not send data. This is useful where you want to have an indicator only like a
siren but no push button alert. It is also useful if you use the AUX1 serial output pin to look at the data
on the system. If the data is fed into a board which contains an OD28 output decoder chip it allows the
user to display LED indicators of which unit has activated. The OD28 ICs can be purchased separately
to enhance the system.
Serial link
A serial link via JP7 AUX1 is provided which has two modes:
1) If the JP4 jumper link nearest the radio module is fitted, the DataStream is a human-readable
ASCII diagnostic stream of 1s and 0s indicating status of the system and each cycle outputs
effectively the message which is being sent to the system from the master
2) If jumper is removed a special OD28 binary stream is sent every cycle and therefore is used by
Radiometrix Ltd
M1144 Application Boards
page 5
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
Radiometrix Ltd
M1144 Application Boards
page 6
Ordering Information
Part No.
Version
M1144-173.225-BiM1-M
Master control board
M1144-173.225-BiM1-S
Slave control board
Other VHF frequency variants can be supplied if required.
Frequency (MHz)
173.225
173.225
M1144-434.650-NiM2B-M
Master control board
M1144-434.650-NIM2B-S
Slave control board
M1144-458.700-NiM2B-M-25mW
Master control board
M1144-458.700-NIM2B-S-25mW
Slave control board
Other UHF frequency variants can be supplied if required.
434.650
434.650
458.700
458.700
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 Application Boards
page 7
Radiometrix Ltd
Hartcran House
231 Kenton Lane
Harrow, Middlesex
HA3 8RP
ENGLAND
Tel: +44 (0) 20 8909 9595
Fax: +44 (0) 20 8909 2233
[email protected]
www.radiometrix.com
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 any infringements of patents
or other rights of third parties which may result from the use of its products. This data sheet neither
states nor implies warranty of any kind, including fitness for any particular application. These radio
devices may be subject to radio interference and may not function as intended if interference is
present. We do NOT recommend their use for life critical applications.
The Intrastat commodity code for all our modules is: 8542 6000
R&TTE Directive
After 7 April 2001 the manufacturer can only place finished product on the market under the
provisions of the R&TTE Directive. Equipment within the scope of the R&TTE Directive may
demonstrate compliance to the essential requirements specified in Article 3 of the Directive, as
appropriate to the particular equipment.
Further details are available on The Office of Communications (Ofcom) web site:
http://stakeholders.ofcom.org.uk/spectrum/technical/rtte/
Information Requests
Ofcom
Riverside House
2a Southwark Bridge Road
London SE1 9HA
Tel: +44 (0)20 7981 3000
Fax: +44 (0)20 7981 3333
www.ofcom.org.uk
European Radiocommunications Office (ERO)
Peblingehus
Nansensgade 19
DK 1366 Copenhagen
Tel. +45 33896300
Fax +45 33896330
[email protected]
www.ero.dk
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