B&B Electronics ADAM-6066 - Manual - Manual (Page 267)

257 Appendix C
• Single isolated cable The diagram shows the structure of an isolated
cable. You see the isolated layer which is spiraled Aluminum foil to
cover the wires. This spiraled structure makes a layer for shielding the
cables from external noise.
Figure C.10: Double isolated cable
• Double isolated cable Figure 10 is an example of a double isolated
cable. The first isolating layer of spiraled aluminum foil covers the con-
ductors. The second isolation layer is several bare conductors that spiral
and cross over the first shield layer. This spiraled structure makes an
isolated layer for reducing external noise. Additionally, follow these
tips just for your reference.
• The shield of a cable cannot be used for signal ground. The shield is
designed for carrying noise, so the environment noise will couple and
interfere with your system when you use the shield as signal ground.
• The higher the density of the shield - the better, especially for commu-
nication network.
• Use double isolated cable for communication network / AI / AO.
• Both sides of shields should be connected to their frame while inside
the device. (for EMI consideration)
• Don’t strip off too long of plastic cover for soldering.