Mounting A Module; Mounting Precautions - Mitsubishi Electric Q26UD(E)HCPU User Manual

4.2

Mounting a Module

4.2.1

Mounting precautions

This section describes precautions for handling CPU modules, I/O modules, intelligent function modules, power supply
modules, and base units.
• Do not drop or apply strong shock to the module case, memory card, SD memory card, extended SRAM
cassette, terminal block connector, and pin connector.
• Do not remove the printed-circuit board of a module or extended SRAM cassette from the case.
Doing so may cause failure of the module and/or printed-circuit board.
• Tighten the module fixing screws and terminal block screws within the specified torque range shown in the
following table.
Module fixing screw (M3 × 12)
I/O module terminal block screw (M3)
I/O module terminal block fixing screw (M3.5)
Power supply module terminal screw (M3.5)
• Be sure to install a power supply module in the power supply installation slot of Q3B, Q3SB, Q3RB,
Q3DB, Q6B, Q6RB, Q6WRB, QA1S6B or QA6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.
• When using an extension cable or a tracking cable, keep it away from the main circuit cable (high voltage
and large current).
Keep a distance of 100mm or more from the main circuit.
• The following are precautions on use in combination with a module whose depth is 130mm or more (such as
Q66DA-G).
1) A module that is less than 130mm in depth cannot be mounted between modules that are 130mm or
more in depth.
2) A module that is less than 130mm in depth cannot be mounted on the right side of a module that is
130mm or more in depth.
3) When the power supply module Q64P(N) is used and a module that is 130mm or more in depth is
mounted in slot 0, it may be difficult to mount/remove a CPU module or insert/remove a memory card.
Although there is no problem with the system operation, if it is inconvenient, mount a module that is less
than 130mm in depth in slot 0 or leave the slot empty.
In case of using the QA1S6B, when installing the base unit to DIN rail in an environment of frequent vibration, use a
vibration-proofing bracket (A1S-PLT-D). Mounting the vibration-proofing bracket (A1S-PLT-D) enhances the resistance to
vibration.
Depending on the environment to install the base unit, it is also recommended to secure the base unit directly to the control
panel.
Screw
CHAPTER 4 INSTALLATION AND WIRING
Tightening torque range
0.36 to 0.48N•m
0.42 to 0.58N•m
0.66 to 0.89N•m
0.66 to 0.89N•m
4
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