sh030051g.pdf - 第54页
2 - 5 2. INSTALLATION (4) Bundle fixing Fix the cable at the closest part to the connector with bundle material in order to prevent SSCNET cable from putting its own weight on CN1A CN1B connector of servo a mplifier. Opt…
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2. INSTALLATION
(3) Avoid any probability that the cable sheath might be cut by sharp chips, rubbed by a machine corner or
stamped by workers or vehicles.
(4) For installation on a machine where the servo motor will move, the flexing radius should be made as large
as possible. Refer to section 10.4 for the flexing life.
2.4 SSCNET
cable laying
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.
Read described item of this section carefully and handle it with caution.
(1) 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 servo amplifier. When closing the door of control box,
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.
For the minimum bend radius, refer to section 11.1.5.
(2) Prohibition of vinyl tape use
Migrating plasticizer is used for vinyl tape. Keep the MR-J3BUS
M, and MR-J3BUS M-A cables away
from vinyl tape because the optical characteristic may be affected.
Optical code Cable
SSCNET cable Code Cable
MR-J3BUS M
MR-J3BUS M-A
MR-J3BUS M-B
: Phthalate ester plasticizer such as DBP and DOP
may affect optical characteristic of cable.
: Normally, cable is not affected by plasticizer.
(3) Precautions for migrating plasticizer added materials
Generally, soft polyvinyl chloride (PVC), polyethylene resin (PE) and fluorine resin contain non-migrating
plasticizer and they do not affect the optical characteristic of SSCNET
cable.
However, some wire sheaths and cable ties, which contain migrating plasticizer (phthalate ester), may
affect MR-J3BUS
M and MR-J3BUS M-A cables (made of plastic).
In addition, MR-J3BUS
M-B cable (made of quartz glass) is not affected by plasticizer.
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2. INSTALLATION
(4) Bundle fixing
Fix the cable at the closest part to the connector with bundle material in order to prevent SSCNET
cable
from putting its own weight on CN1A
CN1B connector of servo amplifier. Optical cord should be given
loose slack to avoid from becoming smaller than the minimum bend radius, and it should not be twisted.
When bundling the cable, fix and hold it in position by using cushioning such as sponge or rubber which
does not contain migratable plasticizers.
If using adhesive tape for bundling the cable, fire resistant acetate cloth adhesive tape 570F (Teraoka
Seisakusho Co., Ltd) is recommended.
Optical cord
Loose slack
Recommended product:
NK clamp SP type
( NIX, INC.)
Cable
Connector
Bundle material
(5) Tension
If tension is added on optical cable, 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. For the tension strength, refer to section 11.1.5.
(6) Lateral pressure
If lateral pressure is added on optical 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 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.
(7) 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.
(8) Disposal
When incinerating optical cable (cord) used for SSCNET
, hydrogen fluoride gas or hydrogen chloride gas
which is corrosive and harmful may be generated. For disposal of optical fiber, request for specialized
industrial waste disposal services who has incineration facility for disposing hydrogen fluoride gas or
hydrogen chloride gas.
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2. INSTALLATION
2.5 Inspection items
WARNING
Before starting maintenance and/or inspection, turn off the power and wait for 15
minutes or more until the charge lamp turns off. Then, confirm that the voltage
between P(
) and N( ) is safe with a voltage tester and others. Otherwise, an
electric shock may occur. In addition, always confirm from the front of the servo
amplifier whether the charge lamp is off or not.
Any person who is involved in inspection should be fully competent to do the work.
Otherwise, you may get an electric shock. For repair and parts replacement,
contact your safes representative.
POINT
Do not test the servo amplifier with a megger (measure insulation resistance),
or it may become faulty.
Do not disassemble and/or repair the equipment on customer side.
It is recommended to make the following checks periodically.
(1) Check for loose terminal block screws. Retighten any loose screws.
(2) Check the cables and the like for scratches and cracks. Perform periodic inspection according to operating
conditions.
2.6 Parts having service lives
The following parts must be changed periodically as listed below. If any part is found faulty, it must be changed
immediately even when it has not yet reached the end of its life, which depends on the operating method and
environmental conditions. For parts replacement, please contact your sales representative.
Part name Life guideline
Servo amplifier
Smoothing capacitor 10 years
Relay
Number of power-on and number of emergency
stop times : 100,000 times
Cooling fan 10,000 to 30,000hours (2 to 3 years)
Absolute position battery Refer to section 12.2
(1) Smoothing capacitor
Affected by ripple currents, etc. and deteriorates in characteristic. The life of the capacitor greatly depends
on ambient temperature and operating conditions. The capacitor will reach the end of its life in 10 years of
continuous operation in normal air-conditioned environment.
(2) Relays
Their contacts will wear due to switching currents and contact faults occur. Relays reach the end of their life
when the cumulative number of power-on and emergency stop times is 100,000, which depends on the
power supply capacity.
(3) Servo amplifier cooling fan
The cooling fan bearings reach the end of their life in 10,000 to 30,000 hours. Normally, therefore, the
cooling fan must be changed in a few years of continuous operation as a guideline.
It must also be changed if unusual noise or vibration is found during inspection.