Mitsubishi Electronics QSPCU ユーザーズマニュアル

9

 - 5

9

(2) MELSECNET/H module

Be sure to use double-shielded coaxial cables (MITSUBISHI CABLE INDUSTRIES, 
LTD.: 5C-2V-CCY) for the coaxial cables of MELSECNET/H module. Radiated noise 
in the range of 30HMz or higher can be suppressed by using double-shielded coaxial 
cables. Ground the double-shielded coaxial cable by connecting its outer shield to the 
ground.

Refer to (1) for the shield grounding processing.

(3) Ethernet module

Precautions for using AUI cables, twisted pair cables, and coaxial cables are 
described below. 

 • Be sure to ground the AUI cables

*1

 connected to the 10BASE5 connectors. Since 

the AUI cable is of the shielded type, ground the exposed shield section of the 
cable, where the cable jacket was partly removed as shown in Figure 9.5, on the 
widest contact surface.

Refer to (1) for the shield grounding processing.

 * 1 : Make sure to install a ferrite core for the cable.

The ZCAT2032 ferrite core manufactured by TDK is recommended.

 • Use shielded twisted pair cables for the twisted pair cables connected to the 

10BASE-T/100BASE-TX connectors. Ground the exposed shield section of the 
shielded twisted pair cable, where the cable jacket was partly removed as shown 
in Figure 9.6, on the widest contact surface.

Refer to (1) for the shield grounding processing.

Earth here

Shield

AUI cable

Shield

Shielded twisted pair cable

Shield