Wiring - Siemens SIMODRIVE 611 Planning Manual

10 Cabinet Design and EMC
10.2 EMC measures
10.1.4
10.2
Screen connection
cables
10
Connecting up the
shield to the front
panel
Connection,
electronics ground
Protection against
overvoltages
Additional
measures
10-312

Wiring

All of the power cables, such as the line supply feeder cable, must be shielded.
The shields must be connected to ground through the largest possible surface
area.
The mounting surfaces for the line supply infeed and drive modules as well as
the commutating reactors and line filter must be mounted on mounting panels
with a good conducting surface (e.g. galvanized mounting panels).
EMC measures
The screens of pre–assembled original manufacturer's cables are automatically
connected when the connector is inserted.
Exceptions:
– Setpoint cable from an analog NC
In this case, the shields of the setpoint pairs must be connected to the
upper side of the module. The threaded holes can be used for this pur-
pose. (M5x10/3 Nm).
– SINUMERIK 840C drive bus cable
Here, the shield is connected to the above mentioned threaded socket
using the clamp provided
– Drive bus– and equipment bus extensions for two–tier designs.
In this case, the screens at each end of the cable must be connected to
the above mentioned threaded holes using the clamps provided.
– Motor power cables
The screens of the motor power cables are connected to the screen con-
necting plates (accessories) of the modules using the clamp connectors
provided.
Additional measures, refer to Section 7.2.1
In order to ensure a good connection between the front panel and the housing,
the front panel screws must be tightened up to 0.8 Nm.
Terminal X131 (electronics ground) at the NC.
A varistor module Order No.: 6SN1111–0AB00–0AA0 can be inserted at con-
nector X181 at the NE module to protect against overvoltage conditions (line
supplies which are not in compliance with VDE (this measure is not required for
UI 5 kW and monitoring module).
Note
All of the measures described here are only valid for supply networks which are
not compatible with VDE. In normal industrial supply networks, it is guaranteed,
without having to use other measures that the disturbance and noise values
remain below the permissible limits, thus ensuring disturbance–free operation
 Siemens AG 2001 All rights reserved
SIMODRIVE 611 Planning Guide (PJU) – 05.01 Edition
05.01