Robbo
Guest
Fri Apr 09, 2010 12:26 pm
Hi,
I've just projected a board which has the aim of measuring the weight
by reading a 6-wire load cell. This board is power supplyed by a
trasforme, thus, in this moment, it is isolated from the public power
net.
My questions are:
1) Where have I to connect the shield of the load cell cables? To
signal ground or to earth?
2) Have I to connect the signal ground to earth? Directly? By a
capacitor?
3) Waht happen If I connect the cable shield to signal groud and I
don't connect the signal ground to earh?
Thank you
baron
Guest
Fri Apr 09, 2010 12:26 pm
Robbo Inscribed thus:
Quote:
Hi,
I've just projected a board which has the aim of measuring the weight
by reading a 6-wire load cell. This board is power supplyed by a
trasforme, thus, in this moment, it is isolated from the public power
net.
My questions are:
1) Where have I to connect the shield of the load cell cables? To
signal ground or to earth?
2) Have I to connect the signal ground to earth? Directly? By a
capacitor?
3) Waht happen If I connect the cable shield to signal groud and I
don't connect the signal ground to earh?
Thank you
If the shield is not carrying any signal or power currents then connect
it to earth. The load cells are normally balanced wiring so signal
ground may or may not be the same as earth. Without details its hard
to be specific.
--
Best Regards:
Baron.
