Advantech PCI-1723 Spezifikationen PDF herunterladen (Seite 27)

3.4 Field Wiring Considerations

When you use the PCI-1723 to acquire data from outside, noises in the

environment might significantly affect the accuracy of your

measurements if due cautions are not taken. The following measures

will be helpful to reduce possible interference running signal wires

between signal sources and the PCI-1723.

" The signal cables must be kept away from strong electromagnetic

sources such as power lines, large electric motors, circuit breakers

or welding machines, since they may cause strong electromagnetic

interference. Keep the analog signal cables away from any video

monitor, since it can significantly affect a data acquisition system.

" If the cable travels through an area with significant

electromagnetic interference, you should adopt individually

shielded, twisted-pair wires as the analog input cable. This type of

cable has its signal wires twisted together and shielded with a

metal mesh. The metal mesh should only be connected to one

point at the signal source ground.

" Avoid running the signal cables through any conduit that might

have power lines in it.

" If you have to place your signal cable parallel to a power line that

has a high voltage or high current running through it, try to keep a

safe distance between them. Or, you should place the signal cable

at a right angle to the power line to minimize the undesirable

effect.

" The signals transmitted on the cable will be directly affected by

the quality of the cable. In order to ensure better signal quality, we

recommend that you use the PCL-10168 shielded cable.

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 ... 59 60

Keine Kommentare

Advantech PCI-1723 Spezifikationen Seite 27