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MELSEC-Q
5 PROCEDURES BEFORE SYSTEM OPERATION
5.2 Installation
The following section explains the precautions when handling the QJ71PB92D, from
the time they are unpacked until they are installed.
For more details on the module installation, see the user's manual for the PLC CPU
used.
5.2.1 Handling precautions
(1) Do not drop the module case or subject it to heavy impact since it is made of
resin.
(2) Do not remove the PCB of each module from its case. This may cause a
failure in the module.
(3) Be careful not to let foreign objects such as wire burrs enter the module
during wiring. In the event any foreign object enters, remove it immediately.
(4) The top surface of the module is covered with a protective film to prevent
foreign objects such as wire burrs from entering the module during wiring.
Do not remove this film until the wiring is complete. Before operating the
system, be sure to remove the film to provide adequate heat ventilation.
(5) Tighten the module mounting screws and connector mounting screws using
torque within the following ranges.
Screw location
Tightening torque range
Module mounting screws (M3 screws)
36 to 48 N · cm
PROFIBUS cable connector mounting screws
(#4 - 40UCN)
20 to 28 N · cm
5.2.2 Installation environment
Refer to user’s manual of the CPU module used.