Keeping Out Foreign Materials; Cable Stress; Fan Unit Replacement Procedure; List Of Applicable Fan Units - Mitsubishi Electric Melservo-Jet MR-JET Series User Manual

2.2

Keeping out foreign materials

When drilling the cabinet for assembly, prevent drill chips and wire fragments from entering the servo amplifier.
Prevent foreign matter such as oil, water, and metallic dust from entering the servo amplifier through openings in the cabinet
or through a cooling fan installed on the ceiling.
When installing the cabinet in a place where toxic gas, dirt, and dust exist, conduct an air purge (force clean air into the
cabinet from outside to make the internal pressure higher than the external pressure) to prevent such materials from entering
the cabinet.
When not using the CN1A, CN1B, or CN3 connector, cover them with the supplied cap.
2.3

Cable stress

• The method used to clamp the cable must be fully examined so that bending stress and cable's own weight stress are not
applied to the cable connection.
• When used for applications where the servo motor moves, fix the cable (encoder, power supply, brake) with gentle slack
from the connecting part of the connector to prevent stress from being applied to the connecting part of the servo motor
connector. Use the optional encoder cable within the bending life range.
• Prevent the cable insulator from being cut by sharp chips or from touching and rubbing against the machine corners.
• Prevent the cables from getting stepped on by workers or run over by vehicles.
• If installing the servo motor that moves on a machine, make the bend radius as large as possible. Refer to the following for
the bending life.
Page 51 Cable bending life
Precautions
• The cables should not be damaged, stressed, loaded, or pinched.
2.4

Fan unit replacement procedure

A fan unit is composed of a cooling fan and its cover. If replacing the cooling fan, replace the entire fan unit.
Shut off the power supply before replacing the fan unit.

List of applicable fan units

Servo amplifier
MR-JET-200_
MR-JET-300_
2 INSTALLATION
12
2.2 Keeping out foreign materials
Model of fan unit to be replaced
MR-JET-FAN1