Protective Connection And Equipotential Bonding - Siemens Sinamics S120 Manual

Cabinet design and EMC Booksize

12.10 Protective connection and equipotential bonding

Conditions of use for 24 V cables
● Ambient temperature 55° C
● Conductor temperature limit ≤ 70° C for operation with the rated load current
● Max. cable length:
– 10 m for the 24 V supply cables
– 30 m for signal lines without additional connections
12.10 Protective connection and equipotential bonding
Protective connections
The SINAMICS S Booksize drive system is designed for use in cabinets with a PE conductor
connection.
The protective conductor connection of the SINAMICS components must be connected to
the protective conductor connection of the control cabinet as follows:
Table 12- 29 Conductor cross-section for copper protective connections
Line supply cable in mm
Up to 16 mm
From 16 mm
From 35 mm
For materials other than copper, the cross-section should be increased so that as a
minimum, the same conductivity is attained.
All system components and machine parts must be incorporated in the protection concept.
The protective connection (PE connection) for the motors used must be established through
the motor cable. For EMC reasons, the shield of the motor cable should be connected
through a large surface area both at the Motor Module as well as at the motor.
The drive line-up must be arranged on a common bright mounting plate in order to comply
with the EMC limit values. The mounting plate must be connected to the protective conductor
connection of the control cabinet through a low impedance.
Copper cables with appropriate cross-sections (> 2.5 mm²) must be used for the ground
connection of PROFIBUS nodes.
For more information about grounding PROFIBUS, see:
http://www.profibus.com/fileadmin/media/wbt/WBT_Assembly_V10_Dec06/index.html
760
2
2
to 35 mm
2 2
2
Copper protective connection in mm
The same as the line supply cable
16 mm
2
0.5 x line supply cable
Manual, (GH2), 04/2014, 6SL3097-4AC00-0BP6
2
Booksize Power Units