R
Rileyesi
- Jan 1, 1970
- 0
We make instrument systems where the sensors generate analog DC voltages and
are connected to the display panel with a signal cable. We have always used a
multi-condictor cable that has a braided wire overall shield (i.e. no
individual shields between the condunductors). We have always used analog
indicators. I've never had complaints about signal noise showing up on the
indicators.
However, I have a new installation where digital indicators will be used. I
THINK that if there is any noise may show up more on the digital indicators
than on the analog. So, I am looking for ideas on noise reduction.
To be more specific, the current signal cable has 7 condictors that are gage 18
in size. 2 are to power the sensors and the other 5 are signal. The range of
singals is about 0-5 VDC. I recommend to the customer to ground only one side
of the braided shield. One last thing, the singal cable run is anywhere from
50 to 2,500 meters. On the 2,500 meter run, we might use an RF link.
The problem is that our products are installed in a wide variety of
environments. Anything from insustrial plants to remote fields with nothing
for miles!
Any tips or information sources on noise reduction would be appreciated.
Thanks.
are connected to the display panel with a signal cable. We have always used a
multi-condictor cable that has a braided wire overall shield (i.e. no
individual shields between the condunductors). We have always used analog
indicators. I've never had complaints about signal noise showing up on the
indicators.
However, I have a new installation where digital indicators will be used. I
THINK that if there is any noise may show up more on the digital indicators
than on the analog. So, I am looking for ideas on noise reduction.
To be more specific, the current signal cable has 7 condictors that are gage 18
in size. 2 are to power the sensors and the other 5 are signal. The range of
singals is about 0-5 VDC. I recommend to the customer to ground only one side
of the braided shield. One last thing, the singal cable run is anywhere from
50 to 2,500 meters. On the 2,500 meter run, we might use an RF link.
The problem is that our products are installed in a wide variety of
environments. Anything from insustrial plants to remote fields with nothing
for miles!
Any tips or information sources on noise reduction would be appreciated.
Thanks.