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2 - 3 2. INSTALLATION (b) Installation of two or more servo amplifiers Leave a large clearance between the top of the servo am plifier and the internal surf ace of the control box, and install a cooling fan to prevent th…
2 - 2
2. INSTALLATION
(b) Installation of two or more servo amplifiers
POINT
Close mounting is available for the servo amplifier of under 3.5kW for 200V
class and 400W for 100V class.
Leave a large clearance between the top of the servo amplifier and the internal surface of the control
box, and install a cooling fan to prevent the internal temperature of the control box from exceeding the
environmental conditions.
When installing the servo amplifiers closely, leave a clearance of 1mm between the adjacent servo
amplifiers in consideration of mounting tolerances.
In this case, bring the ambient temperature within 0 to 45
(32 to 113 ), or use it at 75% or smaller
effective load ratio.
40mm or more
Control box
30mm
or more
30mm
or more
Control box
Leaving clearance
Mounting closely
30mm
or more
1mm 1mm
100mm
or more
30mm
or more
100mm
or more
10mm
or more
40mm
or more
Top
Bottom
(2) 11k to 22kW
(a) Installation of one servo amplifier
40mm or more
10mm
or more
120mm
or more
Wiring allowance
80mm
Top
Bottom
Servo amplifier
Control box
Control box
10mm
or more
2 - 3
2. INSTALLATION
(b) Installation of two or more servo amplifiers
Leave a large clearance between the top of the servo amplifier and the internal surface of the control
box, and install a cooling fan to prevent the internal temperature of the control box from exceeding the
environmental conditions.
100mm
or more
30m
or more
120mm or more
30mm
or more
10mm or more
Control box
Top
Bottom
(3) Others
When using heat generating equipment such as the regenerative option, install them with full consideration
of heat generation so that the servo amplifier is not affected.
Install the servo amplifier on a perpendicular wall in the correct vertical direction.
2.2 Keep out foreign materials
(1) When installing the unit in a control box, prevent drill chips and wire fragments from entering the servo
amplifier.
(2) Prevent oil, water, metallic dust, etc. from entering the servo amplifier through openings in the control box or
a cooling fan installed on the ceiling.
(3) When installing the control box in a place where there are much toxic gas, dirt and dust, conduct an air
purge (force clean air into the control box from outside to make the internal pressure higher than the
external pressure) to prevent such materials from entering the control box.
2.3 Cable stress
(1) The way of clamping the cable must be fully examined so that flexing stress and cable's own weight stress
are not applied to the cable connection.
(2) For use in any application where the servo motor moves, fix the cables (encoder, power supply, brake) with
having some slack from the connector connection part of the servo motor to avoid putting stress on the
connector connection part. Use the optional encoder cable within the flexing life range. Use the power
supply and brake wiring cables within the flexing life of the cables.
2 - 4
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.