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© Siemens AG 2008 All Rights Reserved
SIMODRIVE 611 Configuration Manual (PJU) – 05/2008 Edition
Infeed Modules
6.1 Description
The infeed modules are used to connect the drive group to the line supply.
The infeed/regenerative feedback module (I/R module) and the module for the
unregulated infeed (UI module) are used to input power into the DC link. Fur-
ther, the I/R, UI, and the monitoring module also provide the electronics power
supply for the connected modules.
The infeed modules do not have any comprehensive overload protection. Such
overload protection must be provided by the configuration and correct setting of
the current values in the control boards.
For the UI module, when the motor brakes, the drive energy injected into the DC
link is converted into heat in the braking resistors and dissipated to the environ-
ment. These braking resistors are either integrated or mounted. When required,
one or more additional pulsed resistor modules (PR modules) can be used
within the limits specified when engineering the system.
This module is used for the following applications:
S Machines with few or short braking cycles, low braking energy
S Drive groups with limited dynamic demands, in particular for the main
spindle drive
I/R modules and HF/HFD commutating reactors form the step–up converter
(7 kHz) for controlling the DC link voltage and enabling a regenerative feed-
back. This module is used for the following applications:
S Machines with high dynamic requirements placed on the drives
S Frequent braking cycles and high braking energy
S Control cabinet designs optimized for low operating costs
Note
The HFD reactor is required for the function of the I/R modules, because this is
cyclically short–circuited for the step–up converter voltage control function!
General
information
UI module
I/R module with
HFD reactor
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