Specifications

Theory of Operation
24
31007715 6/2008
Logic Power Flow
Summary Logic power is the power that the Advantys STB I/O modules require to run their
internal processing and light their LEDs. It is distributed across an island segment
by a 5-to-24 VDC power supply. One of these power supplies is built into the NIM to
support the primary segment; another is built into the STB XBE 1200 BOS modules
to support any extension segments. If you need to provide more logic power in a
primary or extension segment than the initial power supply can deliver, you may also
use an STB CPS 2111 auxiliary power supply.
These power supplies require an external SELV-rated 24 VDC power source, which
is usually mounted in the enclosure with the island.
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