Siemens Sinumerik 828D Manual page 36

Application planning
3.1 Secondary electrical conditions
MB Shielded signal cable with reference ground
M Motor
G Encoder
PA Equipotential bonding conductor
PS Protective connection (via metal design or green-yellow protective conductors)
Figure 3-1 Grounding concept
The following rules apply for external cable cross sections:
● PA cross-section ≥ 10 mm
● The conductor cross-section of the external protective conductor is calculated from the
conductor cross-section of the line connection as follows:
Line connection S (mm
S ≤ 16
16 ≤ S ≤ 35
S ≥ 35
36
2
)
2
External protective conductor min. (mm
S
16
S/2
Manual, 05/2015, 6FC5397-2DP40-3BA4
)
2
PPU and components