Mitsubishi Electric MELSEC iQ-F FX5 User Manual page 48

Precautions for SSCNET cable wiring
SSCNET cable is made from optical fiber. If optical fiber is added a power such as a major shock, lateral pressure, haul,
sudden bending or twist, its inside distorts or breaks, and optical transmission will not be available. Especially, as optical fiber
for MR-J3BUS_M, MR-J3BUS_M-A is made of synthetic resin, it melts down if being left near the fire or high temperature.
Therefore, do not make it touched the part which becomes high temperature, such as radiator or regenerative option of servo
amplifier and servomotor. Be sure to use optical fiber within the range of operating temperature described in each servo
amplifier instruction manual. Read described item of this section carefully and handle it with caution.
■Minimum bend radius
Make sure to lay the cable with greater radius than the minimum bend radius.
Do not press the cable to edges of equipment or others. For SSCNET cable, the appropriate length should be selected with
due consideration for the dimensions and arrangement of Simple Motion module or servo amplifier. When closing the door of
control panel, pay careful attention for avoiding the case that SSCNET cable is hold down by the door and the cable bend
becomes smaller than the minimum bend radius.
Model name of SSCNET cable
MR-J3BUS_M
MR-J3BUS_M-A
MR-J3BUS_M-B
■Tension
If tension is added on the SSCNET cable, the increase of transmission loss occurs because of external force which
concentrates on the fixing part of SSCNET cable or the connecting part of SSCNET connector. At worst, the breakage of
SSCNET cable or damage of SSCNET connector may occur. For cable laying, handle without putting forced tension.
(Refer to each servo amplifier instruction manual for the tension strength of SSCNET cable.)
■Lateral pressure
If lateral pressure is added on the SSCNET cable, the cable itself distorts, internal optical fiber gets stressed, and then
transmission loss will increase. At worst, the breakage of SSCNET cable may occur. As the same condition also occurs at
cable laying, do not tighten up SSCNET 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.
■Twisting
If the SSCNET cable 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 SSCNET cable may occur at worst.
■Disposal
When incinerating optical cable (cord) used for SSCNET cable, hydrogen fluoride gas or hydrogen chloride gas which is
corrosive and harmful may be generated. For disposal of SSCNET cable, request for specialized industrial waste disposal
services that have incineration facility for disposing hydrogen fluoride gas or hydrogen chloride gas.
5 WIRING
46
5.1 Precautions for Wiring
Minimum bend radius [mm] ([inch])
25 (0.98)
Enforced covering cord: 50 (1.97), Cord: 25 (0.98)
Enforced covering cord: 50 (1.97), Cord: 30 (1.18)