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)
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
JP1
JP5
JP7
Input
JP2
JP4
JP4A
S1
Unused
8-way DIP Switches
Bits 7-4 Global Address
Bits 3-0 Sending Unit Local ID
Power
JP3
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)
RF
Indicators
D1
Relay state Red LED
D2, D3
Communication Link Status Red LEDs
M1144 control chip
28-pin PIC16F883-I/SP
Clock
10MHz (ceramic resonator)
Timer 1
Data rate
Addressing
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)
Extreme current saving
measures
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
Radio modules
-20ºC to +70ºC (some radios may be limited to -10ºC to +55ºC)
(Storage
-30ºC to +70ºC)
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
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