Beckhoff CX8110 Manual page 16

Product overview
Transmission standards
10Base5
The transmission medium for 10Base5 consists of a thick coaxial cable ("yellow cable") with a max. data
transfer rate of 10 Mbaud arranged in a line topology with branches (drops) each of which is connected to
one network device. Because all the devices are in this case connected to a common transmission medium,
it is inevitable that collisions occur often in 10Base5.
10Base2
10Base2 (Cheaper net) is a further development of 10Base5, and has the advantage that the coaxial cable is
cheaper and, being more flexible, is easier to lay. It is possible for several devices to be connected to one
10Base2 cable. It is frequent for branches from a 10Base5 backbone to be implemented in 10Base2.
10BaseT
Describes a twisted pair cable for 10 Mbaud. The network here is constructed as a star. It is no longer the
case that every device is attached to the same medium. This means that a broken cable no longer results in
failure of the entire network. The use of switches as star couplers enables collisions to be reduced. Using
full-duplex connections they can even be entirely avoided.
100BaseT
Twisted pair cable for 100 Mbaud. It is necessary to use a higher cable quality and to employ appropriate
hubs or switches in order to achieve the higher data rate.
10BaseF
The 10BaseF standard describes several optical fiber versions.
Short description of the 10BaseT and 100BaseT cable types
Twisted-pair copper cable for star topologies, where the distance between two devices may not exceed
100 meters.
UTP
Unshielded twisted-pair
This type of cable belongs to category 3, and is not recommended for use in an industrial environment.
S/UTP
Screened/unshielded twisted-pair (shielded with copper braid)
Has an overall shield of copper braid to reduce influence of external interference. This cable is
recommended for use with Bus Couplers.
FTP
Foiled shielded twisted-pair (shielded with aluminum foil)
This cable has an outer shield of laminated aluminum and plastic foil.
S/FTP
Screened/foiled shielded twisted-pair (shielded with copper braid and aluminum foil)
Has a laminated aluminum shield with a copper braid on top. Such cables can provide up to 70 dB reduction
in interference power.
16 Version: 1.4 CX8110