Chapter 7: Setting And Procedure For Operation; Precautions For Handling - Mitsubishi Electric MELSEC-Q QE81WH4W User Manual

7 Setting and procedure for operation

Chapter 7: Setting and procedure for operation

7.1 Precautions for handling

(1) Do not drop or apply strong shock to the module case.
(2) Do not remove the printed-circuit board of the module from the case.
Doing so may cause failure.
(3) Prevent foreign matter such as dust or wire chips from entering the module.
Such foreign matter can cause a fire, failure, or malfunction.
(4) A protective film is attached to the top of the module to prevent foreign matter, such as wire chips,
from entering the module during wiring.
Do not remove the film during wiring.
Remove it for heat dissipation before system operation.
(5) Module fixing screws must be tightened within the specified range as described below.
Loose screws may cause short-circuit, failure, or malfunction.
*1 The module can be fixed easily to the base unit, using the hook on top of the module. However,
if it is used under a vibrating environment, we strongly recommend that the module be fixed with
screws.
Module-fixing screws (M3 screw)
(6) To attach the module to the base unit, firmly insert the protruding portions for fixing the module into
the holes on the base unit, and make sure the module is securely attached to the module holes as
fulcrum points.
Insecure attachment of the module may case malfunction, failure, and a falling.
(7) Before touching the module, make sure that you need to discharge static electricity on your body by
touching a metal that is grounded.
Otherwise, it may cause failure or malfunction to the module.
Table 7.1-1 Tightening torque
Locations of screws Torque range
*1
0.36 - 0.48 N•m
7 - 1
QE81WH4W