Rockwell-automation T3418F ICS Regent Monitored Digital Input Modules, Manual de usuario descargar pdf (Pagina 14)

Monitored Digital Input Modules

, T

ype F (T3411F, T3418F)

Industrial Control Services

Line Monit

oring

For DC powered inputs, the monitored digital input module

can perform line monitoring of the field wiring when a

suitable line monitor device is installed across the field input

switch. A variety of line monitor devices are available to

match the voltage and input redundancy used in the

application.

Figure

shows a single switch connected to a single monitored

input module. This type of configuration uses a line monitor

device which contains two resistors, one in series

with the field

switch and one in parallel with the field switch. Figure

also

applies to fault tolerant input configurations that include

redundant sensors connected to redundant input modules.

Figure

. Line Monitoring, Single Switch Connected to

Single Module.

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Rockwell-automation T3418F ICS Regent Monitored Digital Input Modules, Manual de usuario Pagina 14