Schneider Electric 890USE17700 - Manual (Page 38)

The STB NIP 2212 NIM
38 890USE17700 April 2004
Logic Power
Flow The figure below shows how the NIM’s integrated power supply generates logic
power and sends it across the primary segment:
The figure below shows how the 24 VDC signal is distributed to an extension
segment across the island:
The logic power signal is terminated in the STB XBE 1000 module at the end of the
segment (EOS).
Island Bus Loads The built-in power supply produces 1.2 A of current for the island bus. Individual
STB I/O modules generally draw a current load of between 50 and 90 mA. (Consult
the Advantys STB Hardware Components Reference Guide (890 USE 172 00) for a
particular module’s specifications.) If the current drawn by the I/O modules totals
more than 1.2 A, additional STB power supplies need to be installed to support the
load.
24 VDC
24 V
5 V
24 VDC
24 V
5 V
24 V
5 V