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MDS-D/DH Series Specifications Manual
5-5 Cables and connectors
(c) Tension
If tension is added on optical fiber, 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.
(d) Lateral pressure
If lateral pressure is added on optical communication cable, the optical 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 optical
communication 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.
(e) Twisting
If optical fiber is twisted, it will become the same stress added condition as when local lateral pressure
or bend is added. Consequently, transmission loss increases, and the breakage of optical fiber may
occur at worst.
(f) Cable selection
- When wiring is outside the power distribution panel or machine cabinet, there is a highly possibility
that external power is added. Therefore, make sure to use the cable for wiring outside panel (G380-
L□M)
- If a part of the wiring is moved, use the cable for wiring outside panel.
- In a place where sparks may fly and flame may be generated, use the cable for wiring outside
panel.
(g) Method to lay cable
When laying the cable, do not haul the optical fiver or connector of the optical communication cable
strongly. If strong force is added between the optical fiver and connector, it may lead to a poor
connection.
(h) Protection when not in use
When the CN1A/CN1B connector of the drive unite or the optical communication cable connector is not
used such as pulling out the optical communication cable from drive unit, protect the joint surface with
attached cap or tube for edge protection. If the connector is left with its joint surface bared, it may lead to
a poor connection caused by dirty.
(i) Attaching /Detaching optical communication cable connector
With holding the connector body, attach/detach the optical communication cable connector. If attaching/
detaching the optical communication cable with directly holding it, the cable may be pulled out, and it
may cause a poor connection.
When pulling out the optical communication connector, pull out it after releasing the lock of clock lever.
(j) Cleaning
If CN1A and CN1B connector of the drive unit or optical communication cable connector is dirty, it may
cause poor connection. If it becomes dirty, wipe with a bonded textile, etc. Do not use solvent such as
alcohol.