Mitsubishi MELSEC-Q QD77MS, Руководство пользователя

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Chapter 4 Installation, Wiring and Maintenance of the Product
[2] Precautions for 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 option of servo amplifier and servomotor. 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 QD77MS or servo amplifier. When
closing the door of control panel, 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 cable Minimum bend radius [mm] ([inch])
MR-J3BUS M 25 (0.98)
MR-J3BUS M-A Enforced covering cord: 50 (1.97), Cord: 25 (0.98)
MR-J3BUS M-B Enforced covering cord: 50 (1.97), Cord: 30 (1.18)
(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 Section Appendix 2.1 "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 SSCNET 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.