8EMC AND LOW VOLTAGE DIRECTIVE

(2)MELSECNET/H module

MELSEC-Q

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

Shield

Earth here

Refer to (1) for the earthing of the shield.

(3) Ethernet module, Web server module

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

(a)Always earth the AUI cables connected to the 10BASE5 connectors. Because the AUI cable is of the shielded type, strip part of the outer cover and earth the exposed shield section to the ground on the widest contact surface as shown below.

AUI cable

Shield

Refer to (1) for the earthing of the shield.

(b)Use shielded twisted pair cables as the twisted pair cables connected to the 10BASE-T/100BASE-TX connectors. For the shielded twisted pair cables, strip part of the outer cover and earth the exposed shield section to the ground on the widest contact surface as shown below.

Shielded twisted pair cables

Shield

Refer to (1) for the earthing of the shield.

(c)Always use double-shielded coaxial cables as the coaxial cables connected to the 10BASE2 connectors. Earth the double-shielded coaxial cable by connecting its outer shield to the ground.

Shield

Earth here

Refer to (1) for the earthing of the shield.

Ethernet is the registered trademark of XEROX, Co., LTD.

(4) I/O signal lines and other communication cables

For the I/O signal lines and other communication cables lines (RS-232, RS-422, CC- Link, etc.), if extracted to the outside of the control panel, also ensure to earth the shield section of these lines and cables in the same manner as in item (1) above.

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