Radiometrix Ltd

DX series control boards

page 2

Common features:

Interfaces

Input/output

3.5mm pitch 3 way terminal block

Power

3.5mm pitch 3 way terminal block

(third pin is the PGM input)

RF

5mm pitch 2 pin way terminal block for Helical coil or ¼ wave

monopole antenna (or optional soldered-in aerial)

Indicators

receiver LED

DTX/DRX IC

Clock

3.58MHz (ceramic resonator)

Data rate

500bps Biphase coded burst lasting 150ms

Addressing

User programmable 16 bit address

Operating temperature

-20 to +70 degrees centigrade (some radios may be limited to -10/+55)

(Storage

-30 to +70 degrees)

Figure 2: DXT2, DXR2 interfaces

DTX board

Inputs

Active low logic inputs ('set' and 'reset/momentary)

Pullups to 3V, and protection diodes, provided

Compatible with Normally Open volt-free closing contact (push-buttons)

Supply

4 –15VDC

idle current: <1uA

transmit current (depends upon radio module fitted)

20mA with NTX2-434.650-10 fitted

Radio modules

Any low power SIL pinout transmitter (TX1, NTX2B, TX2A, TX3B)

Size

71 x 32 x 16mm

(3.3mm diameter mounting holes are provided)