Schneider Electric 890USE17700 manual Requirement supplies installed on the island

The STB NIP 2212 NIM

Calculating the The amount of power (See Logic Power Flow, p. 38) that the external power supply

Wattage must deliver is a function of the number of modules and the number of built-in power

Requirement 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:

124 VDC source power supply

2NIM

3PDM

4primary segment I/O modules

5BOS module

6first extension segment I/O modules

7second extension segment I/O modules

8island bus terminator plate

40 890USE17700 April 2004