RS485-modbus
I am working on alarm systems and would like assistance in designing wireless link for the unit, ie sensors to control panel, control panel to monitoring station.
mail from RT
i would like to know...........
The wireless link distance of Transmitter and receiver. The frequency range you want like FM 'n' MHz Are you aware of the regulations of wireless transmission. What band is allowed in your country and what distance. what type of data needs to be transmitted.
If this is for process control, RF should be avoided if possible. You should use 4-20mA current loops, RS485 or IR optics.
delabs
You can study these pages ..........
omega.com--OMWT-XREC-MOD.html
omega.com--OMWT-XREC-MOD.pdf
educypedia--computer-rs232485.htm
crompton-instruments-integrains.htm
with a RS485 and Modbus Network you can do it.
delabs