ABB AO845A 3BSE045584R1 Communication module

ABB AO845A 3BSE045584R1 Communication module

The analog switches connect the multiplexed module output to and from the SCXIbus analog bus. Use these switches when multiplexing the outputs of several modules. In this case, all the module AB0 switches are closed while the output multiplexers of all of the modules except the one being read are disabled. Refer to Chapter 5, Programming, for more information on how to program and configure multiple modules. When you set the multiplexer to Channel 0 and disable the analog bus, the outputs of all eight channels are simultaneously available on the rear signal connector. This configuration is useful in stand-alone applications in which programming is difficult or impossible. The module is useful even without programming in those cases because the module powers up and resets to the parallel-output configuration. The SCXI-1140 outputs are shortcircuit protected but are not overvoltage protected.

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