Rockwell-automation T3418F ICS Regent Monitored Digital Input Modules, Manual de usuario Pagina 11

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Monitored Digital Input Modules
, Type F (T3411F, T3418F)
PD
-
6027
Mar
-
06
11
The field pow
er supply voltage is regulated inside the module
to power the module’s input interface circuits. The power
supply is also wired directly to the field input switches and the
switched side is wired back to the input module. Inside the
input module the input signal passes through a dropping
resistor and connects back to the power supply return.
Figure
6
shows the wiring connections for a single monitored
input module.
When redundant field sensors are installed, each input
modu
le is wired as shown in Figure
6
. In a fault tolerant
configuration the input signals are connected in parallel
across both input modules as shown in Figure
7
.
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