
B1-2INSTALLATION 1. WORK BEFORE INSTALLATION
006-252-05
06.30.01 FM3040 FM-DP L
Service Manual
B1-2
Optical Fiber Cables Handling Precautions
Observe the following handling precautions for optical fiber cables.
• Optical fiber cables differ from normal cables in that they bend easily, and may
break if handled carelessly. Handle with care.
Mechanical characteristics of optical fiber cables
Allowable tension : 30 kg
Allowable bending radius : 90 mm along thickness direction (20 mm at
single-core cord)
• At both ends of the optical fiber cable are cords with a connector which protrude
out by about 40 cm. Dropping or hitting the cords when detaching or connecting
the connector or bending the cord suddenly results in the breaking of the cords
easily compared to the cable portion and damage of the connector. Be especially
careful when handling the optical fiber cables.
When not using the connectors, be sure to place the connector covers over the
connectors to prevent adherence of dusts and dirt.
• Optical fiber cables are packaged simply in a box for cables up to 100 m long.
Cables which are 150m and 200m long are packaged in a wooden drum
packaging which require unpacking work prior to the cable wiring work.
For the wooden drum packaging, remove the drip-proof tube attached to both
ends of the cable after unpacking, and perform wiring work with the spiral tube for
internal wiring protection.
Perform wiring work in the same way for cables up to 100m long in simple
packagings.
Do not pull the cables holding the spiral tube for wiring protection (cord with
connector).
Optical fiber cable
Approx. 1000 mm
External diameter
approx. 40 mm
Approx. 60 mm
Width of adhered
portion of tube
Drip-proof tube
Tension member
FP3B0312.EPS
Connector portion
Approx. 600 mm
External diameter
approx. 16 mm Max. diameter
approx. 30 mm
Spiral tube for wiring protection
Tension member
Optical fiber cable
(Do not pull holding this portion)
FP3B0311.EPS
After completing wiring work (when connecting both connectors), remove the
spiral tube for wiring protection to prevent drop in the optical communication
performance due to bending of the spiral tube for wiring protection of the cord with
connector.