Rockwell-automation T3454 ICS Regent AC Isolated Digital Output Module Manual de usuario descargar pdf (Pagina 2)

AC Isolated Digital Output Module

(T3454)

Industrial Control Services

The processor modules send triplicated write data commands

to the output module over the I/O Safetybus. The processors’

addressing data and data write commands are voted by the

module (preventing I/O Safetybus failures upstream from the

dule from affecting module operation). The voted result is

then passed to the I/O bus interface logic.

Figure

. Block Diagram of 110 VAC Isolated Digital Output Module.

The voted output data from the I/O bus interface logic is then

used to drive the output circuits. Zero crossing turn

TRIAC drivers are used to convert the logic level output drive

signals to switch 110 VAC power to load devices.

When the output is logically turned on, the field d

evice is

energized, and when the output is logically turned off, the

field device is de

energized.

Optical isolation between the module’s logic and field circuits

provides logic

field isolation

— protecting the output

module from field signal over voltages, transients, and other

electrical disturbances. It also provides a safety barrier

between the primary field voltages and user accessible

circuits. Additionally each output is isolated from the other

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Rockwell-automation T3454 ICS Regent AC Isolated Digital Output Module Manual de usuario Pagina 2