Hi all,
I wonder what's the best type of cable to use for RS-485 2 wire + GND
That is, Data+, Data- & GND
I know that Belden 9841 (not recommended for GND connection to use shield) / 9842 with AWG24
But my problem is, if we need to use intermediate terminals (e.g. for connection from one panel to another, and also to terminate unused core & screen), then AWG24 into screw terminals seems to be flimsy, and bigger conductor size would be better.
However, I'm reminded that the characteristic impedance of the cable for RS-485 is expected to be 120 ohm.
Frankly, I'm not expecting very long runs - maximum 30m or less.
Online it says the "GND" connection should not be ignored, especially if both systems don't have the same 0V reference, also the shield should not be used for the GND connection.
Thanks
I wonder what's the best type of cable to use for RS-485 2 wire + GND
That is, Data+, Data- & GND
I know that Belden 9841 (not recommended for GND connection to use shield) / 9842 with AWG24
But my problem is, if we need to use intermediate terminals (e.g. for connection from one panel to another, and also to terminate unused core & screen), then AWG24 into screw terminals seems to be flimsy, and bigger conductor size would be better.
However, I'm reminded that the characteristic impedance of the cable for RS-485 is expected to be 120 ohm.
Frankly, I'm not expecting very long runs - maximum 30m or less.
Online it says the "GND" connection should not be ignored, especially if both systems don't have the same 0V reference, also the shield should not be used for the GND connection.
Thanks