Installing The Base Units; Installation Precautions - Mitsubishi Q2ACPU User Manual

19. LOADING AND INSTALLATION

19.4 Installing the Base Units

Precautions on installation of the main base unit and extension base unit are described
here.

19.4.1 Installation precautions

Precautions for installing a PLC to a panel, etc. are explained below.
(1)
(2)
(3)
(4)
(5)
(6)
To allow sufficient air flow and to make module replacement easy, provide a distance
of at least 80mm (3.15inch) between the module top and any other structure or part.
Do not install the PLC vertically or horizontally, because it may affect the ventilation.
If the base unit is installed to the surface which is not flat or is distorted, an excessive
force is applied to the printed-circuit board and it may cause a fault. Be sure to install
it to a flat surface.
Avoid sharing the same panel with any source of vibration such as a large-sized
magnetic contactor or no-fuse breaker
such devices.
Provide wiring ducts as necessary.
However, when the clearance from the top or bottom of the PLC is less than that in
Fig. 19.1 and Fig. 19.2, pay attention to the following:
(a) When installing a duct over the PLC, the height of the duct must be 50mm
(1.97inch) or less to allow sufficient air flow.
Place the PLC in the proper position so that the user can press the hook on the
top of the module.
Module replacement is not possible if the hook cannot be pressed.
(b) When placing a duct under the PLC, take into account the use of optical fiber
cables or coaxial cables as well as the minimum bending radius of the cables.
If any device is placed in front of the PLC (when the PLC is installed on the back of
the door), a distance of at least 100mm (3.94inch) must be provided to avoid the
influence of radiated noise and heat.
Also, place the base unit at least 50mm (1.97inch) away from any other equipment
on the right or left.
and install to a separate panel or away from
,
19 - 10