2 Engineering
2.6 Power bus
Rapid Link 5 · RAMO5 · RASP5
05/20 MN034004EN
www.eaton.com
47
2.6 Power bus
The power bus supplies RAMO5 and RASP5 Rapid Link 5 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 5 system with RAMO5 and RASP5 units
Observe the following when planning the lengths of the power bus cabling:
•
On a short circuit in one pole at the end of the power bus, for example in
the terminal board of the last consumer, the upstream safety device
must trip. 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