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MELSEC-Q
8 EMC AND LOW VOLTAGE DIRECTIVE
(2) MELSECNET/H module
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.
Earth hereShield
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.
Earth hereShield
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.