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MELSEC-Q
4 SETUP AND PROCEDURES BEFORE OPERATION
44 SETUP AND PROCEDURES BEFORE OPERATION4.1 Handling Precautions
(1) Do not drop the module or subject it to heav y impact.
(2) Do not remove the PCB of the module from its case. Doing so may cause the
module to fail.
(3) Be careful not to let foreign particles suc h as swarf or wire chips enter the module.
They may cause a fire, mechanical failure or m alfunction.
(4) The top surface of the module is cover ed with a protective film to prevent foreign
objects such as wire burrs from entering the modu le during wiring. Do not remove
this film until the wiring is complete. Befor e operating the system, be sure to
remove the film to provide adequate ventil ation.
(5) Tighten the terminal screws using torqu e within the following ranges. Loose
screws may cause short circuits, mechanical f ailures or malfunctions.
Screw location Clamping torque range
Module mounting screws (M3 screws) 36 to 48 N · cm
Terminal block screws (M3 screws) 42 to 58 N · cm
Terminal block mounting screws (M3.5 screws) 66 to 89 N · cm
(6) To mount the module on the base, securel y insert the module fastening latch into
the fastening hole on the base. Improper installation may result in a modul e
malfunction, or may cause the module to fall off.