Keep Out Foreign Materials; Cable Stress - Mitsubishi Electric MR-J3-B Instruction Manual

2. INSTALLATION
(2) 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 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 , or use it at 75% or a smaller effective load
ratio.
30mm
or more
Leaving clearance
(3) Others
When using heat generating equipment such as the regenerative brake 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 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)
supplied with the servo motor, and flex the optional encoder cable or the power supply and brake wiring
cables. 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.
(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.
POINT
Mounting closely is available for a combination of servo amplifiers of 3.5kw or
less. The servo amplifiers of 5kw or more can not be mounted closely.
Control box
100mm
or more
10mm
or more
30mm
or more
40mm
or more
1mm
30mm
or more
Mounting closely
2 - 2
Control box
100mm
or more
1mm
40mm or more
30mm
or more