Mitsubishi Electric MELSEC-A series User Manual page 21

(2) MELSECNET (II) and MELSECNET/10 units
(a) Use a double-shielded coaxial cable for the MELSECNET unit which
uses coaxial cables. Noise in the range of 30 MHz or higher in radiation
noise can be suppressed by the use of double-shielded coaxial cables
(Mitsubishi Cable: 5C-2V-CCY). Earth the outer shield to the ground.
The precautions on shielding to be followed are the same as those
stated in item (1) above.
(b) Ensure to attach a ferrite core to the double-shielded coaxial cable
connected to the MELSECNET unit. In addition, position the ferrite core
on each cable near the outlet of the control panel. TDK-make ZCAT3035
ferrite core is recommended.
(3) Ethernet module
Precautions to be followed when AUI cables and coaxial cables are used
are described below.
(a) Ensure to earth also the AUI cables connected to the 10BASE5
connectors of the A1SJ71QE71-B5. Because the AUI cable is of the
shielded type, as shown in the figure below, partly remove the outer
cover of it, and earth the exposed shield section to the ground on the
widest contact surface.
(b) Use shielded twisted pair cables as the twisted pair cables*1 connected
to the 10BASE-T 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.
Refer to (1) for the earthing of the shield.
*1: Make sure to install a ferrite core for the cable.
As a ferrite core, ZCAT2035 manufactured by TDK is recommended.
Shield Earth this section
AUI cable
Shield
Shielded twisted pair cables
Shield
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