WL Circuit Breakers - Siemens

External Power Consumption
WL Circuit Breaker
The + 24V DC connection must be
connected to X8.3 and the common 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 WLSITOP1 power supply
can be used with up to 3 ETUs and up to
16 CubicleBUS modules simultaneously.
The WLSITOP25 power supply can be used
with two ETUs and up to 8 CubicleBUS
modules simultaneously.
WL PROFIBUS/MODBUS Communication and Electronic Accessories
Selecting a suitable power supply from the Siemens product line
Output current Inrush current Type Order No.
2.5 A < 30 A Logo! Power WLSITOP25
3.8 A < 32 A SITOP Power WLSITOP1
Table 2-24 A Siemens power supply can be selected for one or more WL Circuit Breakers.
SECTION 2
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