Siemens SIRIUS 3RA6 System Manual page 175

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Hazardous voltage!
Will cause death or serious injury.
Unless the extension modules are connected using a PE extension connector, the infeed
system will NOT be grounded.
If you are using the PE infeed and PE tap and decide to expand the infeed system for 3RA6
by adding extension modules, you will need to use a PE extension connector for the
purpose of connecting each additional extension module to its predecessor.
Note
If you are installing the PE infeed on a level surface (screw fastening), it will also need to be
fixed to the surface using an M4 x 16 screw.
SIRIUS 3RA6 compact starter
System Manual, 08/2018, NEB560060102000/RS-AB/007
Instructions
Push the PE infeed against the right-
hand/left-hand side of the screw-type
infeed or extension module and then
push it upwards.
Press the link wedge down.
Use the PE extension connector to
connect the PE infeed and screw-type
infeed/extension module.
Use the PE extension connector to
connect each additional extension
module to its predecessor.
Working from the bottom, push the PE
tap into the relevant slot on the infeed or
extension module until you hear it
engage.
DANGER
7.7 Infeed system for 3RA6
Figure
Accessories
175