Mechanical and electrical configuration
82
X20 system User's Manual 3.10
3.3 Installation
A top-hat rail conforming to the EN 60715 standard (TH35-7.5) is required to mount the PLC. The conductive top-
hat rail is fastened to the back wall of the control cabinet.
The complete system including all individual modules is hung in the desired location on the top-hat rail with the
unlocking mechanisms open and locked in place by closing the unlocking mechanisms. Finally, the modules are
equipped with the prewired terminal blocks.
Information:
Only horizontal or vertical mounting orientation is permitted.
3.3.1 Horizontal installation
10
b = n · 12.5
1)
+0.2
10
40
.2
35
99
35
1)
n ... Number of modules
Figure 22: X20 system - Horizontal installation
For optimal cooling and air circulation, there must be at least 35 mm free space above the modules. To the left
and right of the X20 system, there must be at least 10 mm of free space. Underneath the modules, 35 mm space
must be left free for I/O and power supply cabling.