Mitsubishi Electric Q172DCPU User Manual page 116

4 INSTALLATION AND WIRING
Insert the module fixing projection into the fixing hole in the base unit to install the module.
Incorrect installation could result in malfunction, failure, or a drop of the module.
When using the modules in a place where there is large vibration or impact, screw the module
to the base unit.
Tighten the screws within the specified torque range.
If the screw is too loose, it may cause a drop of the module, a short circuit or malfunctions.
If too tight, it may cause damage to the screws and/or module, resulting in an accidental drop of
the module, short circuit or malfunctions.
POINTS
(1) When installing the module, always insert the module fixing projection into the
module fixing hole of the base unit.
At that time, securely insert the module fixing projection so that it does not
come off from the module fixing hole.
If the module is forcibly installed without the latch being inserted, the module
connector and module will be damaged.
(2) When using the modules in a place where there is large vibration or impact,
screw the module to the base unit.
Module fixing screw : M3 12 (user-prepared)
Screw the Motion CPU module to the main base unit using supplied fixing
screws.
(3) Do not install/remove the module onto/from base unit or terminal block more
than 50 times, after the first use of the product. Failure to do so may cause the
module to malfunction due to poor contact of connector.
CAUTION
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