Connecting The Power Supply - Siemens NCU 7 0.2 Series Manual

Table 7- 4
Rated voltage
Non-periodic overvoltages
Transient voltage interruptions
Additional references
Recommended power supply units and tables for calculating power consumption for
interconnection with SINAMICS S120 modules can be found in the chapter entitled Control-
Cabinet Construction and EMC Booksize in the SINAMICS S120 Booksize Power Units
Manual.
7.4.3

Connecting the power supply

Wiring the screw-type terminal block
The required 24 V DC load current supply is wired to screw-type terminal block X124.
The 24 V direct voltage is to be configured as a protective extra low voltage - DVC A or
PELV.
Supply system lines
Table 7- 5
Characteristics
Connector type
Connection option
Current carrying capacity
Max. cable length
NCU 7x0.2
Manual, 02/2011, 6FC5397-0AP20-0BA0
DC power supply requirements in accordance with EN 61131-2
Voltage range (average value)
Voltage ripple peak-to-peak
Ramp-up time at power-on
Duration of overvoltage
Restoration time
Events per hour
Outage time
Restoration time
Events per hour
DANGER
Cable specification for X124
24 V DC
20.4 to 28.8 V DC
5 % (unfiltered 6-pulse rectification)
Any
≤ 35 V
≤ 500 ms
≥ 50 s
≤ 10
≤ 3 ms
≥ 10 s
≤ 10
Version
Screw-type terminals
Up to 2.5 mm
2
Max. 10 A
10 m
Connecting
7.4 Power supply
51