Handling Precautions - Mitsubishi A1SJH User Manual

4. AnSHCPU MODULE
4.3

Handling precautions

• Use the PLC in an environment that meets the general specifications contained in this manual.
Using this PLC in an environment outside the range of the general specifications could result in
electric shock, fire, malfunction, and damage to or deterioration of the product.
• Securely insert and install the module fixing projection on the module bottom into the fixing hole
of the base module, before tightening the module fixing screws up to the specified torque.
Unless the module is properly installed and screwed on, it may cause a malfunction, failure, or
fall.
• Tighten the screws in the specified torque range.
Tightening the screws insufficiently may cause the module to fall, short-circuit, or malfunction.
Tightening the screws too much may cause the module to fall, short-circuit, or malfunction due
to damage to the screws or the module.
• Push the memory cassette onto the fixing connector to install it securely. Check that floating
does not occur after its installation. Poor contact could result in a malfunction.
• Do not directly touch conductive parts or electronic parts of the module. Doing so may cause a
malfunction and failure of the module.
This section gives handling instructions from unpacking to installation of the
AnSHCPU, I/O module, extension base unit, etc.
!
(1) Since the case, terminal block connector, and pin connector of this PLC are
made of plastic, do not drop them or subject them to mechanical shock.
(2) Do not remove the printed circuit board of any module from its case.
Removal may cause board damage.
(3) When wiring, take care to prevent entry of wire offcuts into the module. If any
conductive debris enters the module, make sure that it is removed.
(4) Tighten the module mounting screws and terminal screws as indicated below.
Screw
Module mounting screw (M4 screw)
I/O module terminal block terminal screw (M3.5 screw)
CAUTION
4 - 16
MELSEC-A
Tightening torque range N · cm
78 to 118
59 to 88