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3
SPECIFICATIONS
3.2 Cable Specifications
3.2.2 Coaxial cable
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3.2.2
Coaxial cable
The following shows the specifications of a coaxial cable used in the MELSECNET data 
link system.
As for a coaxial cable, use "3C-2V" or "5C-2V" (conforming to JIS C 3501) of a high-
frequency coaxial cable.
(1) Specifications of coaxial cable
The following shows the specifications of a coaxial cable.
As for a coaxial cable, choose the one which meets the operating ambient 
temperature (0 to 55 ) described in the general specification.
Table 3.6 Specifications of coaxial cable
Item
3C-2V
5C-2V
Structure
Cable diameter
5.4mm
7.4mm
Allowable bend radius
22mm or more
30mm or more
Diameter of internal 
conductor
0.5mm (Annealed copper wire)
0.8mm (Annealed copper wire)
Diameter of insulator
3.1mm (Polyethylene)
4.9mm (Polyethylene)
Diameter of external 
conductor 
3.8mm (Single annealed copper wire mesh)
5.6mm (Single annealed copper wire mesh)
Applicable connector 
plug
Connector plug for 3C-2V:
•BNC-P-3-NiCAu-CF (DDK Ltd.)
Connector plug for 5C-2V:
•BNC-P-5-NiCAu-CF (DDK Ltd.)
•BNC-P-5DV SA(41) (HIROSE ELECTRIC CO., LTD.)
Internal conductor
Insulator
External conductor
External sheath