Precautions Of Sscnet Cable Wiring - Mitsubishi Electric Q172DCPU User Manual

4 INSTALLATION AND WIRING
4.4.3 Precautions of SSCNET cable wiring
SSCNET cable is made from optical fiber. If optical fiber is added a power such as a
major shock, lateral pressure, haul, sudden bending or twist, its inside distorts or
breaks, and optical transmission will not be available. Especially, as optical fiber for
MR-J3BUS M, MR-J3BUS M-A is made of synthetic resin, it melts down if being left
near the fire or high temperature. Therefore, do not make it touched the part, which
becomes high temperature, such as radiator or regenerative brake option of servo
amplifier.
Be sure to use optical fiber within the range of operating temperature described in this
manual.
Read described item of this section carefully and handle it with caution.
(1) Minimum bend radius
Make sure to lay the cable with greater radius than the minimum bend radius. Do
not press the cable to edges of equipment or others. For SSCNET cable, the
appropriate length should be selected with due consideration for the dimensions
and arrangement of Motion controller or servo amplifier. When closing the door of
control box, pay careful attention for avoiding the case that SSCNET cable is
hold down by the door and the cable bend becomes smaller than the minimum
bend radius.
Model name of SSCNET
MR-J3BUS M
MR-J3BUS M-A
MR-J3BUS M-B
(2) Tension
If tension is added on the SSCNET cable, the increase of transmission loss
occurs because of external force which concentrates on the fixing part of
SSCNET cable or the connecting part of SSCNET connector. At worst, the
breakage of SSCNET cable or damage of SSCNET connector may occur.
For cable laying, handle without putting forced tension. (Refer to "APPENDIX1.1
SSCNET cables" for the tension strength.)
(3) Lateral pressure
If lateral pressure is added on the SSCNET cable, the cable itself distorts,
internal optical fiber gets stressed, and then transmission loss will increase. At
worst, the breakage of optical cable may occur. As the same condition also
occurs at cable laying, do not tighten up SSCNET cable with a thing such as
nylon band (TY-RAP).
Do not trample it down or tuck it down with the door of control box or others.
cable Minimum bend radius[mm(inch)]
Enforced covering cord : 50 (1.97)
Code : 25 (0.98)
Enforced covering cord : 50 (1.97)
Code : 30 (1.18)
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25(0.98)