Eaton Rapid Link RAMO5, Manual

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2 Engineering
2.6 Power bus
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Rapid Link 5 · RAMO5 · RASP5 10/19 MN034004EN www.eaton.com
2.6 Power bus
The power bus supplies RAMO5 and RASP5 Rapid Link modules with
power. Plug-in outgoers can be quickly and safely connected at any point
along the bus. The power bus can consist either of a flexible busbar (ribbon
cable) or standard round cables.
Figure 17: Sample configuration of a Rapid Link system with RAMO5 and RASP5 units
Observe the following when planning the lengths of the power bus cabling:
• In the event of a single-pole short circuit at the end of the energy bus,
e. g. in the motor terminal board of the last user, the upstream protec-
tive device must be triggered. The level of short-circuit current depends
on:
• Cable length,
• Conductor cross-section,
• Short-circuit current at the incoming point
• The level of the application-specific voltage drop depends on:
• Cable length,
• Conductor cross-section,
• Current consumption of motors
ATTENTION
• All devices connected to the apparatus and data bus must
also meet the requirements for safe isolation according to
IEC/EN
60947-1 Annex N or IEC/EN 60950.
• Power supply units for the AS-Interface power supply must
meet the safe isolation requirements according to SELV.
M
3 ∼
1.5 mm
2
4 mm
2
4 mm
2
3 AC 400 V∼,
50/60 Hz
Q1
M
3 ∼ M
3 ∼
1.5 mm
2
1.5 mm
2
RAMO RASP
M
3 ∼
1.5 mm
2 1.5 mm
2
1.5 mm
2
1.5 mm
2
RASP
1.5 mm
2
 
RAMO
I >
I >
210 A
F
25 A