SIEMENS
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Siemens D 31 N · March 2016
SINAMICS G120 standard inverters
0.37 kW to 250 kW (0.5 hp to 400 hp)
DC link components
> Braking Modules
5
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Overview
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 to limit the DC link voltage during a short period
of generator operation. 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.
The Braking Module is designed for installation in the PM240
Power Modules, frame size FSGX, and is cooled using the Power
Module fan. The supply voltage for the electronics is taken from
the DC link. The Braking Module is connected to the DC link
using the busbar sets included in the scope of delivery.
The activation threshold of the Braking Module can be adjusted
by means of a DIP switch. The braking power values specified
in the technical specifications apply to the upper activation
threshold.
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Design
The Braking Module has the following interfaces as standard:
•
1 DC link connection
•
1 braking resistor connection
•
1 digital input (inhibit Braking Module/acknowledge faults)
•
1 digital output (Braking Module inhibited)
•
1 DIP switch for adjusting the activation threshold
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Selection and ordering data
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Integration
Connection example of a Braking Module
Description
Article No.
DC link voltage 510 … 720 V DC
Braking Module 50 kW/250 kW
6SL3300-1AE32-5AA0
Braking Module
21.6
21.5
21.4
21.3
21.2
21.1
X21
+24 V
0 V
0 V
R1
DCNA
R2
DCPA
T1
T2
Fault
G_D211_EN_00012a
DC link
connection terminals
Inhibit
Fault output
Inhibit input
Shield
Braking resistor
© Siemens AG 2016