Analog Input Protection
Description
There are maximum four analog inputs possible with maximum of two LTMTAN21 expansion modules. For each LTMT expansion module, the analog input (AI) are provided with protection function.
The AI Protection function generates the following signals:
-
Alarm:
-
For detection setting Under, if the analog input goes below the alarm level
-
For detection setting Over, if the analog input goes above the alarm level
-
-
Trip:
-
For detection setting Under, if the analog input goes below the trip level for the desired time delay
-
For detection setting Over, if the analog input goes above the trip level for the desired time delay
-
Parameter Setting
Each AI Protection function has the following configurable settings:
|
Parameter |
Setting range |
Default value |
|---|---|---|
|
Function |
|
Disable |
|
Detection |
|
Under |
|
Trip level |
4.0–20.0 mA in step of 0.1 mA |
4.0 mA |
|
Time delay |
0.0–6000.0 s in step of 0.1 s |
0.0 s |
|
Alarm |
4.0–20.0 mA in step of 0.1 mA |
4.0 mA |
|
Reset mode |
|
DI + Reset Key |
|
Auto Reset Delay (applicable only if Reset mode is Auto) |
0.0–6000.0 s in step of 0.1 s |
0.0 s |
|
Diagnostic |
|
Disable |