Designs; Mounting Control Unit Using Spacers - Siemens NCU 7x0.3 PN Series Manual

Assembling

6.2 Designs

6.2 Designs
The Control Unit is installed in a control cabinet along with the SINAMICS components.
Designs
The Control Unit is preferably mounted vertically on the rear panel of the control cabinet. The
following fixing options are available:
● Mounting using spacers.
● Mounting without spacers:
Note
The procedures described below for mounting the Control Unit refer to the delivery condition
of the Control Unit: the upper clip is pulled in and the spacers are mounted.
6.3

Mounting control unit using spacers

Introduction
Spacers can be used to mount the control unit on a bare-metal highly-conductive rear wall of
a control cabinet.
Note
The mechanical stability for horizontal mounting is only guaranteed with the help of supports
or similar. These must be clarified depending on the specific application and are not part of
this documentation.
Procedure
Mount the Control Unit with two screws of the M6 type (6 Nm tightening torque) on the
spacers on the rear of the control cabinet.
36
– For NCU 710.3 PN and NCU 720.3 PN.
– For external heat dissipation, only for NCU 730.3 PN.
NCU 7x0.3 PN
Manual, 09/2011, 6FC5397-1EP40-0BA0