Ri Suppression Measures - Siemens SINUMERIK 810DE powerline Equipment Manual

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PCU/ Machine
Operator
TCU
control panel
panel front
SL
– Ground (frame) –
S7-300 peripherals/
IM 361
single I/O module
PA
Grounding bar
Central ground connection
conductor/protective
conductor
Fig. 2-2 Grounding concept
References:
2.1.4

RI suppression measures

In addition to the protective grounding of system components, special precau-
tions must be taken to ensure safe, fault-free operation of the system. These
measures include shielded signal cables, special equipotential bonding, isola-
tion, and shielding measures.
Shielded
To ensure safe, interference-free operation of the installation, it is essential to
signal cables use the cables specified in the individual diagrams.
For digital signal transmission, the shield must have a conductive connection at
both sides of the housing.
Exception:
Standard shielded cables grounded on only one side can be used for devices
from other manufacturers (printers, programming devices, etc.).
Copyright © Siemens AG 2006
SINUMERIK 810D Equipment Manual Configuration CCU (PHC) – 03/2006 Edition
CCU
SL
MB
MB
PA
PA
MB: Shielded signal cable with reference ground
M: Motor
G: Encoder
PA: Equipotential bonding conductor
SL: Protective conductor
/EMV/, EMC Configuring Guidelines
2 Connection Conditions
2.1 Supplementary electrical conditions
Power
Gating
electronics
electronics
SL in the motor cable
MB
G
M (GND)
Machine bed
Cross-sections (mm
w
Line supply connection S
S v 16
16 < S v 35
S > 35
Distributor
box
SL
Terminal
block
SL
2
)
10
SL minimum
S
16
S/2
2-29