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The + 24V DC connection must be
connected to X8.3 and the ground
of the 24V DC voltage supply must
be connected to X8.4.
Selection criteria for the external
power supply:
• First, the maximum continuous
current which the CubicleBUS
modules draw from the
CubicleBUS supply must be
calculated. (see Table 2-23)
• Second, the peak inrush
current of all modules must
be calculated. The power supply
must be capable of bearing the
maximum peak inrush current
for a period of 100 ms.
A power supply must be selected
in accordance with these two
characteristic values. Several WL
Circuit Breakers can be connected to
one power supply. For this purpose,
however, the total of the continuous
currents must be considered. For
example, the 6EP1332-2BA00
power supply can be used with up
to 3 ETUs and up to 16 CubicleBUS
modules simultaneously. The
6EP1332-1SH42 power supply can
be used with 2 ETUs and up to 8
CubicleBUS modules simultaneously.
WL PROFIBUS Communication and Electronic Accessories • July 2004
Selecting a suitable power supply from the Siemens product line
Output current
Inrush current
2.5 A
< 30 A
3.8 A
< 32 A
Table 2-24
A Siemens power supply can be selected for one or more WL Circuit Breakers.
Type
Order No.
Logo! Power
WLSITOP25
SITOP Power
WLSITOP1
2/34
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