Mitsubishi Electric Melservo JE Series Instruction Manual page 30

2. INSTALLATION
(3) Precautions for migrating plasticizer added materials
Generally, soft polyvinyl chloride (PVC), polyethylene resin (PE), and fluorine resin contain non-
migrating plasticizer and they do not affect the optical characteristic of the SSCNET III cable. However,
some wire sheaths and cable ties that contain migrating plasticizer (phthalate ester) may affect MR-
J3BUS_M and MR-J3BUS_M-A cables (plastic).
In addition, the MR-J3BUS_M-B cable (silica glass) is not affected by plasticizer.
A chemical substance may affect its optical characteristic. Therefore, previously check that the cable is
not affected by the environment.
(4) Bundle fixing
Fix the cable at the closest part to the connector with bundle material in order to prevent the SSCNET III
cable from putting its own weight on the CN1A/CN1B connector of the servo amplifier. The optical cord
should be given loose slack to avoid becoming smaller than the minimum bending radius, and it should
not be twisted.
When bundling the cable, fix and hold it in position by using cushioning such as sponge or rubber which
does not contain migratable plasticizers.
If adhesive tape for bundling the cable is used, fire resistant acetate cloth adhesive tape 570F (Teraoka
Seisakusho Co., Ltd) is recommended.
(5) Tension
If tension is added on an optical cable, the increase of transmission loss occurs because of external
force which concentrates on the fixing part of the optical fiber or the connecting part of the optical
connector. Doing so may cause the breakage of the optical fiber or damage of the optical connector. For
cable laying, handle the cable without putting forced tension. For the tension strength, refer to section
11.1.3.
(6) Lateral pressure
If lateral pressure is added on an optical cable, the optical cable itself distorts, the internal optical fiber
gets stressed, and then transmission loss will increase. Doing so may cause the breakage of the optical
cable. As the same condition also occurs at cable laying, do not tighten up the optical cable with a thing
such as nylon band (TY-RAP).
Do not trample it down or tuck it down with the door of the cabinet or others.
Bundle material
Recommended product: NK clamp SP type
(NIX, INC)
2 - 5
Connector
Optical cord
Loose slack
Cable