Mitsubishi Electric Melsec-Q172DCPU User Manual page 153

4 INSTALLATION AND WIRING
(3) Tighten the module fixing screws and terminal block screws within the tightening
torque range specified below.
Location of screw
Motion CPU module fixing screw (M3
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 a power supply module on the main base unit and extension
base unit. Even if the power supply module is not installed, when the I/O modules
and intelligent function module installed on the base units are light load type, the
modules may be operated. In this case, because a voltage becomes unstable, we
cannot guarantee the operation.
(5) When using an extension cable, keep it away from the main circuit cable (high
voltage and large current).
Keep a distance of 100mm (3.94inch) or more from the main circuit.
(6) Be sure to fix a main base unit to the panel using mounting screws. Not doing so
could result in vibration that may cause erroneous operation.
Mount a main base unit in the following procedure.
(a) Fit the two base unit top mounting screws into the enclosure.
(b) Place the right-hand side notch of the base unit onto the right-hand side
screw.
13 screw)
12 screw)
Panel
Panel
4 - 2
Tightening torque range [N•m]
0.36 to 0.48
0.36 to 0.48
0.42 to 0.58
0.68 to 0.92
0.68 to 0.92