Siemens SINAMICS PERFECT HARMONY GH180 - 7.3 Grounding the Drive

Main Control Board
There are three main functions that are contained on the main control board:
• Digital: The digital sub-system section of the main control board, has a two part function:
– provide various data communication interfaces for the control.
– process the digitized motor feedback data from the analog section into pole 󹪝ring
commands for the power cells.
• Analog: The analog sub-system section of the main control board has a three part function:
– receive analog motor feedback inputs.
– perform analog signal conditioning on the feedback input signals.
– convert the conditioned feedback signals into digital data.
• Power supply: The power supply section for the main control board is divided into three
parts:
– DC power input with redundancy
– DC to DC conversion with regulated outputs
– Power supply failure detection.
Fiber Optic Main Board/Fiber Optic Expansion Boards
Each 󹪝ber optic main board has a three part function:
• Connection point and signal driver for all of the 󹪝ber optic connections for the control system.
• Provide optional Safe Torque O󹪜 (STO) functionality.
• Mechanical function utilizing di󹪜erent physical board dimensions which allow for the
appropriate 󹪝ber optic bend radius to be applied during the mechanical assembly of the
control cabinet.
The 󹪝ber optic expansion boards are a single rank (A,B,C phase) add on board to the 󹪝ber optic
main board and are used to expand the DCR from 12 power cell operation up to 24 power cell
operation. The power for the 󹪝ber optic expansion boards is sourced from the 󹪝ber optic main
board.
Field Bus Communications Board (FB Comm)
The Field Bus Communications Board provides a 󹪞exible interface to support several di󹪜erent
ANYBUS communication protocols. Please refer to the communications manual
(A5E50226719) for details.
NXGPro+ Control Description
4.2 Digital Control Rack (DCR)
NXGPro+ Control Manual
Operating Manual, A5E50491925A 41