
B–63463EN/01
D. OPTICAL CABLE
APPENDIX
123
D Fix the reinforcing cover of the external cable or the cord
binding portion of the internal cord type cable by using a cable
clamp, as shown in Fig. D (e), to prevent the weight of the
optical fiber cable from being applied directly to the connecting
part of the optical connector.
(Recommended cable clamp):
Recommended cable clamps are listed below. Use a clamp
that grasps the optical cable lightly; the clamp should not
apply excessive pressure to the cable.
For an external cable:
CKN–13SP (with sponge) (Kitagawa Industry Co., Ltd.)
For an internal cord type cable:
MN–1 (Kitagawa Industry Co., Ltd.)
Optical connector Fiber cord
Reinforcing cover of external cable or
cord binding portion of internal cord type
cable
Bending radius of 25 mm or more
(Make the bending radius as large as
possible.)
Cable clamp
Bending radius of 50 mm or more
(for reinforcing cover)
Bending radius of 25 mm or more
(for cord binding portion)
(Make the bending radius as large as possible.)
Fig. D (e) Fixing the cable with a clamp
D Any superfluous portion of the optical cable may be wound into
a loops. Should this prove necessary, make sure the diameter
of each loop is at least 150 mm (for an external cable) or at least
100 mm (for an internal cord type cable). Winding the cable into
smaller loops may produce sharp curves that exceed the
specified bending radius limit without the user being aware.
Such bending can result in a greater transmission loss,
ultimately leading to a communication failure.
D When using a nylon band (cable tie) as a cable clamp, follow the
instructions given below. Also, take care not to apply a bending
force to one particular part of the cable when fixing it with a
clamp. Failing to clamp the cable correctly may cut or damage
it.
External cable:
Do not clamp the uncovered portion of the cable with a nylon
band. When clamping the cable by the reinforcing cover, the
clamping force is not an important factor to consider. However,
ensure that the clamping force is as small as possible to ensure
that the reinforcing cover is not deformed by the clamping. If
possible, the clamping force should be 5 kg or less.