Schneider Electric 890USE17700 - Manual (Page 40)

The STB NIP 2212 NIM
40 890USE17700 April 2004
Calculating the
Wattage
Requirement The amount of power (See Logic Power Flow, p. 38) that the external power supply
must deliver is a function of the number of modules and the number of built-in power
supplies installed on the island.
The external supply needs to provide 13 W of power for the NIM and 13 W for each
additional STB power supply (like an STB XBE 1200 BOS module). For example, a
system with one NIM in the primary segment and one BOS module in an extension
segment would require 26 W of power.
For example, the figure below shows an extended island:
1 24 VDC source power supply
2 NIM
3 PDM
4 primary segment I/O modules
5 BOS module
6 first extension segment I/O modules
7 second extension segment I/O modules
8 island bus terminator plate