Rockwell-automation T7411F ICS Regent+Plus Monitored Digital input Mod Manual de usuario descargar pdf (Pagina 13)

Monitored Digital Input Modules

, Type F (T7411F, T7418F)

7027

Mar

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

set to the values shown in Table

to detect the state of the

input.

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

The actual voltage levels for the T7418

F are half that shown

in Table

, e.g. the On/Off threshold is 6 Vdc and a line

monitored Switch Open is 8 Vdc. However, when configuring

the input module voltage thresholds, the settings should be as

shown in Table

, i.e. 4 Vdc, 12 Vdc and 20 Vdc. The input

module will automatically halve these setting values for the

input module reference voltages.

Keying

The I/O chassis can be physically keyed to prevent accidental

damage caused by inserting a mo

dule into a slot wired for a

different module type. Figure

illustrates how the slot keys

are installed on the I/O chassis slot field wiring connectors.

The slot key positions for the monitored digital input module

are listed in Table

Note:

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 23 24

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Rockwell-automation T7411F ICS Regent+Plus Monitored Digital input Mod Manual de usuario Pagina 13

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