Siemens SINUMERIK 840D sl Manual page 65

Figure 8-1
(1)
(2)
(3)
Mounting instructions
A seal can be provided for segregated heat removal on the Control Unit (apart from
NCU 710.2 and NCU 720.2). This enables an air-tight connection to be made between the
Control Unit and the rear wall of the control cabinet, i.e. the cooling fins are located outside
the control cabinet.
NCU
Manual, 07/2007, 6FC5397-0AP10-2BA0
Mounting aids
Spacers for mounting on the rear wall of the control cabinet
Lugs for mounting directly on the rear wall of the control cabinet (external heat dissipation)
Cutouts for lateral mounting on SINAMICS drive group
Mounting
8.2 Installation types
65