Rockwell-automation T7411F ICS Regent+Plus Monitored Digital input Mod Manuel d'utilisateur télécharger pdf (Page 8)

Monitored Digital Input Modules

, Type F (T7411F, T7418F)

Industrial Control Services

Application

Simplex Configuration

Monitored digital input modules provide a suitable interface

to safety

critical input signals. The circuits in the monitored

digital input modules are automatically tested and

annunciated, providing a fail

safe interface to digital inputs.

This simplex input configuration is illustrated in Figure

Figure

. Single Monitored Digital Input Configuration.

Fault Tolerant Configurations

For fault tolerant applications, redundant monitored input

modules are used in a fault tolerant configuration. In one

configuration the redundant input modules are connected in

parallel to a single field input device as illustrated in Figure

. If redundant field sensors are installed in the field, the

modules are connected so that each sensor connects to one of

the modules as illustrated in Figure

. In these fault tolerant

configurations, each monitored digital input module is hot

replaceable. If a fault occurs on one module, it can be

removed and replaced while the system continues to correctly

sense the inputs from the remaining module(s).

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Rockwell-automation T7411F ICS Regent+Plus Monitored Digital input Mod Manuel d'utilisateur Page 8