ABB DI890 3BSC690073R1 Analog input board

ABB DI890 3BSC690073R1 Analog input board

This configuration connects all of the multiplexed module outputs in parallel through the SCXIbus backplane. Slot 0 then asserts the SCANCON of each module independently to select one module at a time during scanning. For more information on multiplexer addressing, see the Scanning Modes section later in this chapter, and Chapter 5, Programming Track-and-Hold Control Circuitry Figure 3-5 illustrates the SCXI-1140 track-and-hold control circuitry. Each block is described in the following paragraphs.SCXI-1140 Track-and-Hold Control The two primary modes of operation of the track-and-hold control circuitry are Edge-Triggered mode and Level-Sensitive mode.

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