Siemens PPU 26x.3 series 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
Requirements of the cable cross-section
The following rules apply for external cable cross-sections:
● PA cross-section ≥ 10 mm
● The cable cross-section of the external protective conductor is calculated from the cable
cross-section of the line connection as follows:
36
Line connection S [mm ]
2
S ≤ 16
16 ≤ S ≤ 35
S ≥ 35
2
External protective conductor min. [mm
S
16
S/2
PPU and components
Manual, 10/2015, 6FC5397-2DP40-5BA3
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2