Sscnet Iii Cable Laying [B] - Mitsubishi Electric MELSERVO MR-J5 Series User Manual

2.4

SSCNET III cable laying [B]

The SSCNET III cable is made from optical fiber. If a force such as a major shock, lateral pressure, haul, sudden bending, or
twist is applied to optical fiber, its inside distorts or breaks, and optical transmission will not be available. Especially, as optical
fiber for the MR-J3BUS_M and MR-J3BUS_M-A is made of synthetic resin, it melts if exposed to fire or high temperature.
Therefore, prevent it from being in contact with parts that can become hot such as the heat sink or regenerative option of the
servo amplifier.
Read the descriptions in this section carefully and handle the cable with caution.
Minimum bend radius
Lay the cable with a greater radius than the minimum bend radius. Prevent the cable from being pressed against edges or
other sharp parts of equipment. For the SSCNET III cable, the appropriate length should be selected with due consideration
for the dimensions and arrangement of the servo amplifier so that the cable is laid with a greater radius than the minimum
bending radius. When closing the door of cabinet, pay careful attention for avoiding the case that the SSCNET III cable is held
down by the door and the cable bend becomes smaller than the minimum bend radius. For the minimum bend radius, refer to
the following.
Page 267 SSCNET III cable [B]
Prohibition of using vinyl tape
Migrating plasticizers are used for vinyl tape. Keep the MR-J3BUS_M and MR-J3BUS_M-A cables away from vinyl tape
because the optical characteristics may be affected.
Optical cord
SSCNET III cable
MR-J3BUS_M
MR-J3BUS_M-A
MR-J3BUS_M-B
: Phthalate ester plasticizers such as DBP and DOP may affect the optical characteristics of the cable.
: The cord and cable are not affected by plasticizers.
Precautions for materials containing migrating plasticizers
Generally, soft polyvinyl chloride (PVC), polyethylene resin (PE), and fluorine resin contain non-migrating plasticizers and they
do not affect the optical characteristics of the SSCNET III cable. However, some wire sheaths and cable ties containing
migrating plasticizers (phthalate ester) may affect the MR-J3BUS_M and MR-J3BUS_M-A cables (made of plastic).
Note that the MR-J3BUS_M-B cable (made of silica glass) is not affected by plasticizers.
A chemical substances may affect its optical characteristics. Therefore, check that the cable is not affected by the operating
environment in advance.
Cable
Cord
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Cable
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2 INSTALLATION
2.4 SSCNET III cable laying [B]
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