Control Panel Mounting; Mounting Dimensions - Omron SYSMAC C Series User Manual

Installing the C20
Control panel mounting
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Some of the main considerations when mounting the PC in a control panel
are accessibility for operation and maintenance and protection against
heat.
These are some of the things you should consider:
Use M4x25 mounting screws.
Provide the PC with adequate space for ventilation.
Avoid mounting the controller directly above any heat-generating source,
such as a heater, transformer, or high-capacity resistor.
If the ambient temperature is above 55°C within the panel, you must install
a fan for forced-air ventilation.
Avoid mounting the PC in a panel in which high-tension wiring or
equipment is also installed.
Use wire with a cross-sectional area of at least 2mm?(AGW14) to prevent
possible voltage drop. Use twisted pair cables for the wiring.
Mounting dimensions
When the CPU and I/O unit are mounted together in the control panel, a
distance of about 30mm should be maintained between the two units.
This means that the holes for the CPU mounting screws and those for the
1/0 unit mounting screws should be separated by about 40mm.
Although the CPU is actually 59.5mm thick (measured at the I/O terminal
block), be sure to leave enough room in front of the unit to allow for
instailation of optional peripheral devices, such as the programming
console.
When the programming console is attached to the PC, the total depth
increases to 68mm.