Product description
Page 34
3.3
Brake chopper
A brake chopper with a brake resistor is integrated into the power output stage. If during the generator operation the
permissible charging capacity of the DC bus is exceeded, the braking energy can be converted into heat by the internal brake
resistor. The brake chopper is software-driven. The internal brake resistor is overload-protected by means of software and
hardware.
If in a special application the power of the internal resistors should be insufficient, they can be cut off by removing the bridge
between the pin
BR-CH
and
BR-INT
of the
[
X9] plug. Instead, an external brake resistor is inserted between the pins
BR-CH
and
ZK+
. This brake resistor must fulfil certain minimum specifications (see
). The output is protected against
short-circuiting in the brake resistor or its cable.
Pin
BR-CH
lies on positive DC bus potential and is thus not protected against ground fault or short-circuits
against mains voltage or negative DC bus voltages.
Simultaneous use of the internal and external brake resistors is not possible. The external resistors are not automatically
overload-protected by the device.
3.4
Communication interfaces
The item servo positioning controller C Series has several communication interfaces. The basic device itself is already
equipped with many of these interfaces.
The following communication interfaces are included in the basic device:
Serial interface [X5]: RS232/RS485
USB interface [X19]: USB
UDP interface [X18]: Ethernet
Fieldbus system [X4]: CANopen
I/O interface [X1]: Digital and analog In- and outputs
The serial, Ethernet, and USB interface are particularly important for the connection of a PC and for the use of the item Motion
Soft
parameterisation tool.
The fieldbus systems PROFIBUS-DP and EtherCAT are extension options that can be implemented in the form of plug-in
modules. If required, customer-specific fieldbus protocols can also be realised.
In any case, the servo positioning controller of this design always works as a slave to the fieldbus.
