Mitsubishi Electric MELSERVO-J4 series Instruction Manual page 72

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 SSCNET III cable. However, some wire
sheaths and cable ties, which contain migrating plasticizer (phthalate ester), may affect MR-J3BUS_M
and MR-J3BUS_M-A cables (plastic).
In addition, 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 SSCNET III
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.
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 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. Doing so
may cause the breakage of the optical fiber or damage of the optical connector. For cable laying, handle
without putting forced tension. For the tension strength, refer to section 11.1.3.
(6) Lateral pressure
If lateral pressure is added on optical cable, the optical cable itself distorts, 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 optical cable with a thing
such as nylon band (TY-RAP).
Do not trample it down or tuck it down with the door of cabinet or others.
Bundle material
Recommended product: NK clamp SP type
(NIX, INC)
2 - 5
Connector
Optical cord
Loose slack
Cable