Mounting The Ncu For External Cooling - Siemens SINUMERIK 840D sl Manual

Assembling

6.5 Mounting the NCU for external cooling

6.5 Mounting the NCU for external cooling
Introduction
If the NCU must be externally cooled via the cooling ribs, then it can be directly mounted onto
the rear of the control cabinet panel without using spacers.
Prerequisites
● You have an NCU 720.3 PN or NCU 730.3 PN.
● The bushing for the cooling ribs (external heat sink) has been fitted in the rear wall of the
● Please ensure that the surface around the seal is both clean and flat
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control cabinet.
diagram "Panel cutout").
Figure 6-1 Panel cutout (dimensions in mm)
②
(please see the
NCU 7x0.3 PN, NCU 7x0.3B PN
Manual, 06/2014, 6FC5397-1EP40-5BA1