Outputs
Supply
8amp 240v rated change over relay contacts
LED indicators on both channels
12v (10-15v)
receive/idle current (depends upon radio module fitted)
23mA with LMR2-433-5 fitted
relay current 25mA per activated channel
Radio modules
any LMR version
receive only versions of NiM2, BiM1, BiM2A, BiM3 (any)
CVR1 (5v versions); RDL2 (rx)
RX application board jumpers and DIP swicthes
The RX encoder board has 2 jumpers and 2 DIPswitches. As with TX board, the jumpers are used to select
the number of operating modes featured in the board while the 4 way and 8 way DIP switches are used for
frequency channels selection and address selection respectively.
Assumed the board is held "long side horizontal" with the RF and power connectors at the top
Jumper.
JP12
P13
Name
MODE
PGM
Function
Position
(see operating mode section below)
Ground (left) and the RS232 input (right)
Mode
Select Operating mode
Radio setup (only for LM series
radios)
RX application board DIP switches
The RX application board features a 4 way (S2) and an 8 way (S1) DIP switches. The optional 4 way DIP
switch which is used for parallel frequency channel select is only required when our multi channel LM series
radios like LMR1 / LMR2 s are used. The 8 way Dip switch is used to set an 8 bit (256) unit address.
Operating modes
Device operation is set up by a 3 bit word, on the C0-C2 jumpers. This is JP12 on the boards
TX / Encoder modes
000
001
010
011
100
101
Device is inactive
Send single burst, once only (on reset, and on each C0 low/high transition)
Send continuously
Send single burst on any change of Data input word
Send continuously while any Data input pin is high
Send a burst on average every 1.75 seconds. A P/N sequence generates a delay of 1 -2.5s
between bursts
110
111
Serial mode (see notes)
Transmitter test. Send a constant 250Hz squarewave (C0=H, C1=H, C2=H)
RX / Decoder modes
000
001
010
011
100
101
110
111
Local test. Data output word equals Address input word
Output last data received (150mS timeout)
Output last data (3 second timeout: see notes)
Hold last data received
D0-3 'set' corresponding bit, D4 resets D0, D5 resets D1 .. and so on
A '1' on any bit toggles the state of the corresponding output pin
Serial (see notes)
Link test. Data word outputs most recently received burst address
Radiometrix Ltd
CTA28 Demo board
page 5
RADIOMETRIX [ RADIOMETRIX LTD ]
