Mitsubishi Electric MR-J3-B, Инструкция по эксплуатации

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2. INSTALLATION
2.4 SSCNET cable laying
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.
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 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.
For the minimum bend radius, refer to Section 11.1.5.
(2) Bundle fixing
Fix the cable at the closest part to the connector with bundle material in order to prevent SSCNET cable
from putting its own weight on CN1A CN1B connector of servo amplifier. Optical cord should be given
loose slack to avoid from becoming smaller than the minimum bend radius, and it should not be twisted.
Optical cord
Loose slack
Recommended product:
NK clamp SP type
( NIX, INC.)
Cable
Connector
Bundle material
When laying cable, fix and hold it in position with using cushioning such as sponge or rubber which does
not contain plasticizing material.
Never use vinyl tape for cord. Plasticizing material in vinyl tape goes into optical fiber and lowers the optical
characteristic. At worst, it may cause wire breakage. If using adhesive tape for cable laying, the fire
resistant acetate cloth adhesive tape 570F (Teraoka Seisakusho Co., Ltd) is recommended.
If laying with other wires, do not make the cable touched wires or cables made from soft polyvinyl chloride
(PVC), polyethylene resin (PE), teflon (Fluorocarbon resin) or nylon which contains plasticizing material.
(3) Tension
If tension is added on optical cable, the increase of transmission loss occurs because of external force
which concentrates on the fixing part of optical fiber or the connecting part of optical connector. At worst,
the breakage of optical fiber or damage of optical connector may occur. For cable laying, handle without
putting forced tension. For the tension strength, refer to Section 11.1.5.