Cable Shielding Connections - Siemens SED2 Commissioning Manual

IP20: EMC-compatible wiring of SED2 by means of gland plates (frame sizes A...C)
BMS
I/O modules

4.4.3 Cable shielding connections

• The quality of the shielding connection to ground is decisive for the effectiveness of shielding. All shielding
connections must be "HF-tight", that is, coaxial, low-resistance and low-inductance
• Shielding should be run as close as possible to the device or the respective subassembly
• For IP54 versions of the VSD of frame sizes D...F, use metal
cable fittings as depicted here for the connection of shielded
cables (refer to Mounting Instructions for EMC cable fittings)
• For IP20 versions of the VSD of frame sizes A....C, we recommend to use the optional gland plates to improve
the connection of cable shielding to ground of the VSD
• Avoid pigtails when connecting shielding. Use EMC earthing clamps, cable clamps or shielding connection
clamps that ensure 360° contact (see illustration below)
16 / 100
Siemens
Building Technologies
Metal partition
F1 F2 F3
SED2 SED2
Supply air Extract air
Commissioning Guide
4 EMC-compatible installation of SED2
C-profile rail
U
V
W
Gland plate
Connection and
potential
equalization rail
Strain relief rail
Motor cables
shielded
min. 16 mm 2
SED2 Plastic housing
frame sizes A...C
5192Z38de
Shielding
CM1G5192en
29.07.2010