CTA28 Datasheet, PDF (5/11 Pages) Radiometrix Ltd – CTA88 chip based 2-channel I/O Application Boards

Outputs
8amp 240v rated change over relay contacts
LED indicators on both channels
Supply
receive/idle current
relay current
12v (10-15v)
(depends upon radio module fitted)
23mA with LMR2-433-5 fitted
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. Name
Function
Position
Mode
JP12
MODE
Select Operating mode
(see operating mode section below)
P13
PGM
Radio setup (only for LM series Ground (left) and the RS232 input (right)
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 Device is inactive
001 Send single burst, once only (on reset, and on each C0 low/high transition)
010 Send continuously
011 Send single burst on any change of Data input word
100 Send continuously while any Data input pin is high
101 Send a burst on average every 1.75 seconds. A P/N sequence generates a delay of 1 -2.5s
between bursts
110 Serial mode (see notes)
111 Transmitter test. Send a constant 250Hz squarewave (C0=H, C1=H, C2=H)
RX / Decoder modes
000 Local test. Data output word equals Address input word
001 Output last data received (150mS timeout)
010 Output last data (3 second timeout: see notes)
011 Hold last data received
100 D0-3 'set' corresponding bit, D4 resets D0, D5 resets D1 .. and so on
101 A '1' on any bit toggles the state of the corresponding output pin
110 Serial (see notes)
111 Link test. Data word outputs most recently received burst address
Radiometrix Ltd
CTA28 Demo board
page 5