Catalog PM 21 2013 - Siemens Industry, Inc.

SINAMICS S120 drive system
DC link components
Braking Module in booksize compact format
© Siemens AG 2013
3
■ Overview
Braking Module in booksize compact format
A Braking Module and the matching external braking resistor are
required to bring drives to a controlled standstill in the event of
a power failure (e.g. emergency retraction or EMERGENCY STOP
category 1) or limit the DC link voltage for brief periods of
generator operation, e.g. when the regenerative feedback
capability of the Line Module is deactivated. The Braking Module
includes the power electronics and the associated control circuit.
During operation, the DC link power is converted into heat loss
in an external braking resistor. Braking Modules function autonomously.
A number of Braking Modules in booksize compact
format can be operated in parallel. In this case, each Braking
Module must have its own braking resistor. Braking Modules in
booksize compact format can also be used for rapid discharge of
the DC link.
■ Design
The Braking Modules in booksize compact format can be
integrated in drive line-ups in booksize and booksize compact
formats with internal air cooling and cold plate cooling.
The Braking Module in booksize compact format features the
following connections and interfaces as standard:
• 2 DC link connections via integrated DC link busbars
• 2 electronics power supply connections via
integrated 24 V DC bars
• Connector X1 for connecting the braking resistor
• Connection for thermostatic switch for monitoring the braking
resistor
• 4 DIP switches for setting the operating threshold, selecting
the braking resistor and the cooling method for the Braking
Module
• 2 digital inputs (disable Braking Module/acknowledge faults
and rapid discharge of DC link)
• 3 digital outputs (Braking Module disabled,
prewarning from I × t monitor and set activation threshold)
• 2 PE (protective earth) connections
The status of the Braking Module is indicated via two 2-color
LEDs.
■ Integration
+
M
Braking Module
+
M
24 V DC busbars
DCP
DCN
DCP
DCN
DC link busbars
Max. cable length: 10 m (32.8 ft)
X21
X1
1
DI, inhibit Braking Module
R1
1
2 DI, DC link fast discharge
R2
2
3 DO, „0 V“ = prewarning Ixt-shutdown
4
DO, „0 V“ = fault/Braking Module inhibited
X22
5
M
T1
1
6
M
T2
2
Braking resistor
G_D211_EN_00270
S1
Selection
- Activation threshold
- Braking resistor with/without
- temperature switch
- Cooling method
=
=
DO Vop
5
Selected activation
threshold
High: 410 V DC
Low: 775 V DC
Connection example of Braking Module in booksize compact format
3/178 Siemens PM 21 · 2013