Siemens SIRIUS 3RK3 - Mounting the Central Unit, Expansion Module, or DP Interface Module on a DIN Rail; Mounting the Central Unit, Expansion Module, or DP Interface Module on a Level Surface

5.2.2 Mounting the central unit, expansion module, or DP interface module on a
DIN rail
Requirements
• At the installation location, a horizontal 35-mm wide mounting rail per DIN EN 60715 is
properly secured.
• Pay attention to the information on the mounting position in Chapter "General technical data
(Page 366)."
DIN rail mounting procedure
Step Operating instruction Figure
1 Place the back of the device onto the upper edge of
the standard mounting rail.
2 Press the lower half of the device against the DIN rail
until the device engages.
5.2.3 Mounting the central unit, expansion module, or DP interface module on a
level surface
Requirements
Please note the following requirements for mounting on a level surface:
• Please observe the information about the mounting position in Section "General technical
data (Page 366)".
• Two properly executed drill holes with thread or plug on the level surface
Refer to the relevant dimension drawings in the appendix for the distances between the drill
holes "Dimension drawings (Page 387)".
• Two screws with a maximum thread diameter of 4.8 mm
• Two push-in lugs for screw 󹪝xing
Refer to the accessories list for the relevant article number in Section "MSS 3RK3 system
components (Page 42)".
Description of the hardware
5.2 Mounting / installing / attaching
SIRIUS 3RK3 Modular Safety System
Equipment Manual, 07/2020, NEB926253002000/RS-AC/006 125