Mounting The Control Unit On The Rear Wall Of The Control Cabinet; Mounting Control Unit Using Spacers; Mounting The Control Unit Without Spacers - Siemens SINUMERIK 840D sl Manual

Mounting

8.3 Mounting the control unit on the rear wall of the control cabinet

8.3 Mounting the control unit on the rear wall of the control cabinet
8.3.1

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. This mounting method should be used if a number of Control Units are
required or if you wish to isolate the Line Module spatially.
Procedure
Use two M5 (M6) screws in the spacers to mount the control unit to back rear wall of the
control cabinet.
8.3.2

Mounting the Control Unit without spacers

Introduction
If you need to disconnect Control Units NCU 710.2 and NCU 720.2 from the Line Module, or
simply wish to do so, you can mount them directly on the rear wall of the control cabinet
without spacers.
Proceed as follows
The Control Unit has a metal clip at the top of the rear panel; when shipped, the clip is
pushed in and secured with three M3 screws (0.8 Nm).
1. Remove the spacers.
2. Loosen the screws and push the clip up until the upper hole extends beyond the housing.
56
Manual, 03/2010, 6FC5397-0AP10-3BA0
NCU