Serial Interface Unit (Siu); Power Failure Transfer Unit (Pftu) - STARPLUS Triad 1 Product Description Manual

Optional Units

Serial Interface Unit (SIU)

The SIU2 provides two additional RS232 ports for system use. This board installs on the MISU
board.
Wiring/Pinouts/Connections -- The SIU2 provides two DB9 connectors, one connector for
each of the serial ports on the board.

Power Failure Transfer Unit (PFTU)

The PFTU provides the relay contacts for transfer of six CO Lines to SLTs in the event of a
power or processor failure. The PFTU is equipped with a manual switch that activates the
Power Failure Transfer mode for testing purposes.
Line/Station Interfaces -- The unit has one female 50-pin amphenol connector on the front
edge of the board. The amphenol connector interfaces the PFTU circuits to the MDF.
Figure 10-25: SIU (Serial Interface Unit)
Figure 10-26: PFTU (Power Failure Transfer Unit)
Chapter 10 - Triad 1/2 System Configuration
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