Rockwell-automation T3468A ICS Regent DC Guarded Digital Output Module Manuel d'utilisateur télécharger pdf (Page 2)

DC Guarded Digital Output Modules (T3461A, 62A, 68A)

Industrial Control Services

Module Operation

A block diagram of a typical monitored Guarded output

module is shown in Figure

The processor modules send triplicated write data commands

over the I/O Safetybus to the Guarded output module.

Onboard the Guarded output modules the triplicated data are

routed to two independent voter and I/O Safetybus logic

sections. Each section independently votes the triplicated

data and operates one of the two field effect transistor (FET)

output control switches. The two FETs are connected in series

with the load.

Figure

. Block Diagram of a DC Guarded Output Module.

When both circuits are on, current will flow through the

output and energize a field load. If e

ither switch is off, current

will not flow through the output and the load will be de

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Rockwell-automation T3468A ICS Regent DC Guarded Digital Output Module Manuel d'utilisateur Page 2