12.95
2.1 Secondary electrical conditions
2-27
E Siemens AG, 2002. All rights reserved
SINUMERIK 810D Manual Hardware Configuration (PHC) -- 11.02 Edition
2.1.2 Power supply
The AC power supply is required for external equipment and accessories only
and is not included in the standard scope of delivery.
Table 2-2 Requirements for the AC supply
Rated voltage
S Tolerance
S Frequency
S Booting time after switching on
230VAC
--20%, +10% (184V to 253V)
50/60Hz ¦10%
Optional
Harmonic content according to EN 50178
±10%
Transient voltage dips
S Voltage interruptions at rated voltage and
current
S Restoration time
S Events per hour
± 3msecs
² 10secs
± 10
!
Warning
S The DC supply is always earth-referenced and must not be generated by
an auto-transformer.
S To ensure safe isolation of the user interface, the DC power supply must be
provided with safe isolation. See Subsection 2.1.3.
S In the c ase of s upply cables > 10m, protection elements must be fitted at
the device input in order to protect against lightning (surge voltage).
S The DC supply voltage must be connected to the ground/shield of the NC
for EMC and/or functional reasons. For EMC reasons, this connection
should only be made at one point. As a rule, the connection is provided as
standard in the S7-300 I/Os. If this is not the case in exceptional
circumstances, the ground connection should be made to the grounding rail
of the NC cabinet; see also /EMC/ SINUMERIK, SIROTEC, SIMODRIVE,
EMC Guideline (06.99).
Requirements for
the AC supply
Requirements for
DC
supplies
2In
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