Chapter 7 Settings And The Procedure Before Operation; Handling Precautions - Mitsubishi Electric MELSEC-Q series User Manual

CHAPTER 7
This chapter describes the procedure prior to a CT input module operation, the name of each part of a CT input
module, and wiring method.
7.1

Handling Precautions

This section describes the handling precautions for a CT input module.
• Do not drop the module case, or do not subject it to strong impact.
• Do not remove the printed-circuit board from the case. Doing so can cause module failure.
• Do not disassemble the module. Doing so can cause module failure.
• Prevent foreign matter such as dust or wire chips from entering the module. Such foreign matter can cause a
fire, failure, or malfunction.
• 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.
• Tighten the screws such as a module fixing screw within the specified torque range. Undertightening the
screws can cause short circuit or malfunction. Overtightening can damage the screws and/or module,
resulting in short circuit or malfunction.
Module fixing screw (M3 screw)
Terminal block terminal screw (M3)
Terminal block mounting screw (M3.5)
*1 The module can be easily fixed onto the base unit using the hook at the top of the module. However, it is recommended
to secure the module with the module fixing screw if the module is subject to significant vibration.
• To mount the module, while pressing the module mounting lever located in the lower part of the module, fully
insert the module fixing projection into the hole in the base unit and press the module until it snaps into
place. Incorrect mounting may cause malfunction, failure or drop of the module.
• Before handling the module, touch a grounded metal object to discharge the static electricity from the human
body. Failure to do so may cause the module to fail or malfunction.
136
SETTINGS AND THE PROCEDURE
BEFORE OPERATION
Screw
*1
Tightening torque range
0.36 to 0.48N • m
0.42 to 0.58N • m
0.66 to 0.89N • m