Siemens SINAMICS S120 Installation And Start-Up Manual page 32

Preparations for Commissioning
PROFIBUS components
Table 2-3
When EMC-shielded cables are used, screwed glands that connect the
shield to ground with the greatest possible surface area must be provided on
the motor terminal box.
The cable shields must be connected as close to the conductor terminal
connections as possible to ensure a low-impedance connection with cabinet
ground.
The cable shields must be properly applied and the cabinet properly
grounded at the appropriate points.
The connection voltage for the fans in the chassis units must be adapted
accordingly to the supply voltages by making the appropriate settings on the
fan transformers.
The connection bracket for the interference-suppression capacitor must be
removed from the infeeds for operation with an ungrounded supply.
The type plate can be used to ascertain the date of manufacture. If the
period from the date of manufacture to initial commissioning or the downtime
of the power components is less than two years, the DC link capacitors do
not have to be reformed. If the downtime period is longer than two years,
they must be reformed in accordance with the description in the
"Maintenance and Servicing" chapter in the Equipment Manual.
With an external auxiliary supply, the cables must be connected in
accordance with the Equipment Manual.
Drive operation by higher-level controller / control room. The control cables
must be connected in accordance with the required interface configuration
and the shield applied. Taking into account electrical interference and the
distance from power cables, the digital and analog signals must be routed
with separate cables.
2-32
Checklist for commissioning (chassis), continued
Activity
SINAMICS S120 Installation and Start-Up Manual, 12/04 Edition
E Siemens AG, 2004. All rights reserved
O. K.