Chassis; Braking Modules; Description - Siemens SINAMICS S120 Equipment Manual

T [s]: Duration of load with peak power
a
P
DB
P
max
6.2

Chassis

6.2.1

Braking Modules

6.2.1.1

Description

A Braking Module (and an external braking resistor) is required in certain cases when the
drive is to be braked or brought to a standstill (e.g. EMERGENCY SWITCHING-OFF
Category 1). The Braking Module contains the power electronics and the associated control.
The supply voltage for the electronics is taken from the DC link.
During operation, the DC link energy is converted to heat loss in an external braking resistor.
A mounting slot is provided in the Power Module.
Design
The Braking Module in chassis format is installed in a slot within the Power Module and
force-cooled by its fan. The Braking Module is connected to the DC link by means of flexible
cables, which are supplied as standard.
The Braking Module has as standard, the following interfaces:
● The DC link is connected through flexible cables
● Connecting terminal for external braking resistor
● 1 digital input (inhibit Braking Module with high signal/acknowledge error with negative
edge high low)
● 1 digital output (Braking Module defective)
● DIP switch for adjusting the starting threshold
AC Drive
Manual, 06/2019, 6SL3097-5AL00-0BP1
[kW]: Unit rating of the braking resistor
[kW]: Peak power of the braking resistor
DC link components
6.2 Chassis
171