Specifications

The STB NIP 2311 NIM Module
EIO0000000051 6/2010 39
Here is an example of 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
The extended island bus contains three built-in power supplies:
z the supply built into the NIM, which resides in the leftmost location of the primary
segment
z a power supply built into each of the STB XBE 1300 BOS extension modules,
which reside in the leftmost location of the two extension segments
In the figure, the external supply would provide 13 W of power for the NIM plus 13 W
for each of the two BOS modules in the extension segments (for a total of 39 W).
NOTE: If the 24 VDC source power supply also supplies field voltage to a power
distribution module (PDM), you must add the field load to your wattage calculation.
For 24 VDC loads, the calculation is simply amps x volts = watts.