Siemens SIMATIC S7-1500 Automation System System Manual page 42

Installation
5.2 Installing the mounting rail
Dimensions for the drill holes
The following table contains the dimensions for the mounting rail drill holes.
Table 5- 2 Dimensions for the drill holes
"Standard" mounting rails
Length of the mounting rail Distance a
160 mm
482.6 mm
530 mm
830 mm
Additional fixing screws (for mounting rails > 530 mm)
For mounting rails > 530 mm, we recommend setting additional fixing screws at intervals of
≤ 500 mm on the identification groove.
42
Distance b
10 mm 140 mm
8.3 mm 466 mm
15 mm 500 mm
15 mm 800 mm
"Longer" mounting rails
System Manual, 01/2013, A5E03461182-01
S7-1500 Automation System