Siemens SINUMERIK 840D sl Manual page 134

Connection of the Components
5.6 Electronics Power Supply
Example for the splitting of the consumer lines:
● NCU / NX
● Line / Motor Modules
● Supply of the Sensor Modules
● Consumers such as relays, valves, etc.
● Additional brakes not supplied from the Motor Module
Multiple power supplies are recommended for larger plant concepts.
Example of the separation:
● Power supply for the direct drive system (NCU, NX, LM, MM, SME and SMC)
● Power supply for additional consumers, such as brakes, valves and power contactors
If required, the circuit-breakers can be equipped with additional auxiliary switches. If these
signal contacts are fed to a higher-level controller, a detailed fault diagnosis can be
performed when the circuit-breakers trip.
Notes
● SINAMICS components have a reverse polarity protection on the 24 VDC infeed side.
● Line, Motor, Braking, Capacitor and Control Supply Modules are short-circuit resistant on
● If no higher short-circuit current can occur, a protection can be omitted. This means the
● If higher short-circuit current occur, a protection against over-current / short-circuit must
● The maximum protection of the power supply infeed for Control Unit and Sensor Module
● The maximum protection of the controller inputs/outputs at the other components
Component
Control Unit
Sensor Module Cabinet (SMC)
Smart Line Module
Active Line Module
Motor Module
● Controller outputs at the Line, Motor and Braking Module, Control Unit and Sensor
5-50
the 24 V busbar for a maximum current of 20 A. The 24 V terminal adapter for the infeed
has a maximum connection cross-section of 6 mm
components can be connected directly to the power supply.
be provided, max. 20 A, however. In a fault situation, the used power supply must be able
to supply the required current until tripping.
Cabinet depends on the connected cable cross-section (max. 2.5 mm
however.
depends on the connected cable cross-section:
Module Cabinet are short-circuit resistant.
.
2
max. cable cross-section
0.5 mm
2
1.5 mm
2
1.5 mm
2
1.5 mm
2
1.5 mm
2
Guide for the SINUMERIK 840D sl machine configuring
Manual, 07/2006 Edition, 6FC5397-6CP10-0BA0
), maximum 20 A,
2