Module Installation; Precaution On Installation - Mitsubishi MELSEC- Q Q12PHCPU User Manual

9 LOADING AND INSTALLATION

9.3 Module Installation

9.3.1 Precaution on installation

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Use the PLC in an environment that meets the general specifications
CAUTION
contained in this manual. Using this PLC in an environment outside the
range of the general specifications could result in electric shock, fire,
erroneous operation, and damage to or deterioration of the product.
Hold down the module loading lever at the module bottom, and
securely insert the module fixing latch into the fixing hole in the base
unit. Incorrect loading of the module can cause a malfunction, failure or
drop. When using the PLC in the environment of much vibration, tighten
the module with a screw.
Tighten the screw in the specified torque range. Undertightening can
cause a drop, short circuit or malfunction. Overtightening can cause a
drop, short circuit or malfunction due to damage to the screw or
module.
When installing more cables, be sure that the base unit and the module
connectors are installed correctly. After installation, check them for
looseness. Poor connections could cause an input or output failure.
Securely load the memory card by pushing it into the memory card
loading slot. Check for insecure loading after loading the memory card.
Not doing so can cause a malfunction due to a contact fault.
Completely turn off the external power supply before loading or
unloading the module. Not doing so could result in electric shock or
damage to the product.
Note that online module change can be made when the QnPHCPU
is used.
Note that there are restrictions on the modules that can be changed
online and each module has a predetermined changing procedure.
For details, refer to the section of online module change in this
manual.
Do not directly touch the module's conductive parts or electronic
components. Touching the conductive parts could cause an operation
failure or give damage to the module.
This section gives instructions for handling the CPU, I/O, intelligent function and power
supply modules, base units and so on.
(1) Module enclosure, terminal block connectors and pin connectors are made of resin;
do not drop them or subject them to strong impact.
(2) Do not remove modules' printed circuit boards from the enclosure in order to avoid
changes in operation.
(3) Tighten the module fixing screws and terminal block screws within the tightening
torque range specified below.
Location of Screw
Module fixing screw (M3
I/O module terminal block screw (M3 screw)
I/O module terminal block fixing screw (M3.5 screw)
Power supply module terminal screw (M3.5 screw)
(4) Be sure to install the power supply module in the Q3 B, Q6 B and QA1S6 B.
Even if the power supply module is not installed, when the I/O modules and
intelligent function module installed on the base units are of light load type, the
modules may be operated. In this case, because a voltage becomes unstable, we
cannot guarantee the operation.
(5) When an extension cable is used, do not bind the cable together with the main
circuit (high voltage, heavy current) line or lay them close to each other.
12 screw)
MELSEC-Q
Tightening Torque Range
36 to 48 N cm
•
42 to 58 N cm
•
66 to 89 N cm
•
59 to 88 N cm
•
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