Siemens Sinumerik 840 sl Configuration Manual

12.95
2.1 Secondary electrical conditions
2-31
E Siemens AG, 2002. All rights reserved
SINUMERIK 810D Manual Hardware Configuration (PHC) -- 11.02 Edition
2.1.4 Earthing co n cep t
The 810D system consists of a number of individual components, each of
which, in its own right, complies with EMC and safety standards.
The CCU box and the SIMODRIVE components are screwed to a metal cabinet
wall. Make sure that a low-impedance contact of the CCU box with the cabinet
wall can be made near the screws. Insulating varnishes should be removed if
possible. Keep the connection free of corrosion.
The electronic earths of the modules are interconnected via the device and
drive bus and at the same time conducted to the X151 terminal of the MS
module.
References: /EMV/, EMC Installation Guideline
PA
PA
Power
electronics
Machine bed
Earth bar
Earth terminal
PA
M
G
PA
Triggering
electronics
CCU
SL in the motor cable
Machine
controlpanel
PLC I/Os
PA
MB
PA
NCU terminal
block
PA
Distributor
box
Cross sections (mm
2
)
²10
Mains connection S
SL min.
S ±16
16 < S ± 35
S> 35
S
16
S/ 2
Large--area conductive connection
with earthed housing
Equipotential bonding conductor (± 30cm)
to earthed housing, A=10mm
2
PCU
Operator
panel front
MB: Shielded signal cable
with reference earth
M: Motor
G: Encoder
PA: Equipotential
bonding conductor
SL: Protective conductor
S: Mains connection S
Fig. 2-2 Earthing concept
2In
s
t
a
l
l
a
tion Condition
s
11.02

Siemens Sinumerik 840 sl Specifications

General

Brand	Siemens
Model	Sinumerik 840 sl
Category	Control Unit
Language	English