BECKHOFF CX2020 - Manual (Page 21)

Mounting and wiring
3.3 Installation on the mounting rail
Snapping onto the mounting rail
The CX20x0 can simply be snapped onto the mounting rail. The bar clips are inserted on the top side and
underside Then simply position the block on the mounting rail and push it slightly until it engages on the
right­hand side. This is indicated by a distinct click. The bars are then engaged again. The engagement of
the individual bars is indicated by a distinct click.
Attention
Avoid damage!
Do not force the module or apply excessive pressure!
Installation position
Attention
Comply with the permitted installation position and minimum distances!
The maximum ambient temperature for CPU modules mounted on a DIN rail is 60°C. The
orientation in which the device is fitted must be selected in such a way that cooling air can
flow vertically through the ventilation holes. The images below show the permitted and two
incorrect installation positions. Mounting must provide a clearance of 30 mm both above
and below a CX20x0 device combination to ensure adequate ventilation of the base CPU
module and the power supply unit.
Correct installation position
The high performance and the compact design of the CX20x0 systems may result in increased heat
generation. The heat is dissipated via a passive ventilation system. This system requires the unit to be
mounted correctly. Ventilation openings are located at the top and bottom of the housing. The system
therefore has to be installed horizontally. This ensures optimum air flow.
CX2020, CX2030, CX2040 21 Version 1.2