Mitsubishi Electric C70 Connection Manual page 76

This section describes precautions for handling the CPU modules, I/O modules, power supply modules and
basic base unit, etc.
(1) Do not drop or apply strong impact on the modules, terminal block connectors and pin connectors.
(2) Do not remove modules printed circuit boards from the case in order to avoid failure.
(3) The module fixing screws and terminal block screws within the tightening torque range specified below
Location of screw
CNC CPU module fixing screw (M3 × 13 screw)
Module fixing screw (M3 × 12 screw)
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) Make sure to install the power supply module on the basic base unit and extension base unit. When the
power supply module is not installed and if the I/O modules and intelligent function module installed on
the basic base unit are 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. Keep the cable at least 100 mm away from the line.
(6) Be sure to use the fixing screws and fix the basic base unit on the panel to avoid an operation failure due
to vibrations.
Install the basic base unit in the following procedure.
(a) Fit the two fixing screws for top of the basic base unit to the panel.
(b) Place the right-hand side notch of the basic base unit onto the right-hand side screw.
C70 Connection Manual
3.1 Module Installation
Tightening torque range
0.36 to 0.48N m
0.36 to 0.48N m
0.42 to 0.58N m
0.68 to 0.92N m
0.68 to 0.92N m
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