Chapter 2 Product Specifications
2-9
2.4 Cable Specifications
2.4.1 UTP cable
UTP cable is classified into 2 types based on the following criteria.
① Shield: classified into 3 (UTP, FTP, STP)
② Frequency band used: classified into 7 (Cat.1~7)
1) Type of cables (shield)
Classification Details Purpose
UTP (or U.UTP)
Unshielded
data transmission.
Max. 200MHz
Phonetic+Data+Low grade of video signal
FTP (or S.UTP) Shielded cable core only.
Max.100MHz
Electronic impediment (EMI) and electric stability
considered
Phonetic+Data+Low grade of video signal
STP (or S.STP)
Double-shielded cable.
Shielded core and
Pair cable
Max. 500MHz
Phonetic+Data+Video signal
Substitute for 75Ω coaxial cable
1) UTP : Unshielded Twisted Paired Copper Cable
FTP : (Overall) Foiled Twisted Paired Copper Cable
STP : (Overall) Shielded(and Shielded Individually Pair)Twisted Paired Copper Cable
2) Patch Cable(or Patch Cord)
Conductor composed of stranded cable instead of solid conductor may be used to increase the
flexibility of UTP 4-pair cable. And surface specification and materials used is Un-coated AWG
24 (7/0203A).
In other words, the diameter of a single cable is 0.203mm, and this cable is of 1+6 structure as
standardized with annealed copper cable.
3) It is recommended to use S,STP cable in PLC Ethernet. If it’s not possible because of field
conditions, error (communication error and module error by noise) might occur.
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