Installation
6
6.1 Safety instructions
Note
The NCU is exclusively intended for installation in ESD-protected zones. The CE-associated
ESD interference immunity limit values can only be achieved via installation in the control
cabinet. Only make physical contact using appropriate ESD protective measures.
Open equipment
These modules are open equipment. This means they may only be installed in housings,
cabinets or in electrical service rooms that can be entered or accessed exclusively by means
of a key or tool. Housings, cabinets, or electrical equipment rooms may only be accessed by
trained or authorized personnel. An external fire protection casing is required.
NOTICE
The module can be damaged if power is connected to the NCU when installing/removing it
When installing the NCU, the system and the NCU must be disconnected (brought into a no
voltage condition).
Control cabinet installation
Please refer to the SINAMICS documentation for more details.
WARNING
Risk of fire through overheating if there are insufficient ventilation clearances
Inadequate ventilation clearances cause overheating with a risk for personnel due to smoke
and fire. Further, this can result in increased failures and a shorter service life of devices/
systems.
It is essential that you maintain 80 mm ventilation clearances above and below the NCU.
NOTICE
Risk of destroying components resulting from high discharge currents
The NCU or other PROFIBUS or PROFINET nodes can be destroyed if significant discharge
currents flow through the PROFIBUS or PROFINET cable.
Between parts of a plant or system, use an equipotential bonding conductor with a minimum
cross-section of 25 mm².
NCU 1760
Equipment Manual, 02/2020, A5E45627861B AB 45
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