Free Space Required For An S7-300 Installation - Siemens CPU 313C Hardware And Installation Manual

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1. When you mount the rails, allow sufficient space for mounting modules and heat
elimination (at least 40 mm above and below the modules. See the figure
below).
2. Mark up the mounting holes on the mounting surface. Drill the holes to a
diameter of 6.5
3. Screw on the rail (M6 screws).
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Take care to create a low-impedance connection between the rail and a
mounting surface which is a grounded metal plate or equipment mounting plate.
In the case of varnished or anodized metals, for instance, use a suitable
contacting agent or contact washers.
Figure 6-2 Free space required for an S7-300 installation
6-6
+0,2
mm.
40 mm
SIEMENS
20
mm
40 mm
S7-300 Automation System, Hardware and Installation: CPU 31xC and CPU 31x
20
mm
A5E00105492-03