Rockwell-automation T7411 ICS Regent+Plus Monitored Digital Input Modu Manual de usuario descargar pdf (Pagina 12)

Monitored Digital Input Modules

(T741

Industrial Control Services

Figure

. Line Monitoring, Single Switch Connected to

Redundant Modules.

With the line monitor device installed, the input voltage, V

has four possible states as represented in Table

. When the

input module reads the input, the reference voltage, V

ref

, is

set to the values shown in Table

to detect the state of the

field input and wiring.

Table

. Input States and Reference Voltage Thresholds.

ref

Threshold

Voltage

with Line

Monitor

without

Line Monitor

Stuck

on Test

32 Vdc

24 Vdc

Wire Open

Switch Open

Open Circuit

20 Vdc

16 Vdc

Switch Open

On/Off

12 Vdc

8 Vdc

Switch Closed

Short Circuit

4 Vdc

0 Vdc

Wire Short

Switch Closed

Stuck

Off Test

5 Vdc

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 22 23

ICS Regent+Plus 1
Module Operation 2
Testing and Diagnostics 3
Application 8
Field Wiring 10
Configuration 14
Industrial Control Services 16
Maintenance 20
Safety Conside 20
Specifications 21

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Rockwell-automation T7411 ICS Regent+Plus Monitored Digital Input Modu Manual de usuario Pagina 12

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