Siemens SINAMICS S120 Combi User Manual page 110

External fan unit
5.4 Installation
Table 5- 1 Mounting accessories
Number Designation
5 Self-clinching flush head studs M4, steel, strength class 8.8, zinc-plated, length: 15 mm
5 Nut
The reinforcement plates must always be installed when operating the S120 Combi with the
external fan unit.
CAUTION
Operation without the reinforcement plates is not permissible. If the reinforcement plates
are incorrectly fixed, this can result in an excessively high heat sink temperature and cause
the S120 Combi to prematurely trip.
WRONG: S120 Combi and external fan unit without
reinforcement plates
108
Specification
M4, steel, strength class 8, zinc-plated
CORRECT: S120 Combi and external fan unit with installed
reinforcement plates
SINAMICS S120 Combi
Manual, Edition 07/2012, 6SL3097-4AV00-0BP3