Equipotential Bonding
© Siemens AG, 2004. All rights reserved
EMC Installation Guideline – Planning Guide (EMV) – 03.2004 Edition
4-25
4.3 Examples of equipotential bonding
M
TG
CPU
314
PS
NCU
**)
Fil-
ter
ENC
CPU
314
DIN rail
DIN rail
SIMATIC S7-300
SIMATIC S7-300 with FM NC
Large-area, conductive connection to
earthed housing
1)
PE in motor cable, also used as equipotential
bonding conductor
2) Connection provided internally
3) Lead required only if unit has a
frame connection
Central
earthing connector
Central
earthing bar
1)
M
M
*) With I/RF module
**) With U/E module
2)
2)
SIMODRIVE
611
Fil-
ter
*)
X131
XXX
XXX
XXX
XXX
XXX
XXX
XXX
Metal cubicle
Operator panel
Operator
panel
Mach. cont. p
el. handwheel
3)
XXX
Machine base
Motor controlled by SIMODRIVE 611A
XXX
Fig. 4-4 Equipotential bonding in the SINUMERIK FM NC with SIMODRIVE 611
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