D.2.2 Panel-To-Panel Cables; Wiring Separation; Shield Treatment; Exposed Conductor Length - YASKAWA MP920 User Manual

Appendix D Wiring Communications

D.2.2 Panel-to-Panel Cables

D.2.2 Panel-to-Panel Cables
Communications
215IF,
217IF RS-485
CP-215
Repeater
D.2.3

Wiring Separation

D.2.4

Shield Treatment

D.2.5

Exposed Conductor Length

The following table shows the panel-to-panel cables used for communications.
Always use the specified cables. Otherwise, the communications system will fail to provide
its full performance.
When bending a communications cable, be sure that the bending radius is at least 10 times
the finished outer diameter of the cable.
Cable Type
System
Twisted-pair cable:
YS-IPEV-S (Cu), 1P
manufactured by Fujikura Corpo-
ration
Coaxial cable:
5C-2V (Cu, Fe)-ZV, manufac-
tured by Fujikura Corporation
• House the shielded communications cables in a low-voltage circuit duct that is different
from general operation circuit ducts. If this is not possible, keep the low-voltage circuits
at least 100 mm away from the general control circuits.
• Likewise, keep the shielded communications cables at least 300 to 1,200 mm from the
main circuits.
• Ground the shield at one point only for panel-to-panel cables.
• Using a ground wire of 8 mm
independent ground pole with a ground resistance of 100Ω or less.
• The exposed conductor length of each panel-to-panel twisted-pair cable should be as
short as possible (100 mm or less).
• The characteristic impedance of the exposed conductor section is greater than the pre-
scribed value (75Ω).
• Increasing the exposed conductor length increases transmission waveform distortion,
resulting in a transmission error.
Twisted-pair cable
Table D.3 Cable Bending Radius
Finished
Outer
Diameter
dl (mm)
8.6
×
1.25 mm,
12.0
2
or greater, ground the shielded ground trunk cable to an
100 mm max.
D-16
Permissible Applicable Duct
Bending
Radius
10 dl (mm)
86 min.
Low-voltage
duct
120 min.
Low-voltage
duct