Rockwell-automation 1794-IJ2XT FLEX I/O Frequency Input Modules User M Instrukcja Użytkownika Pobierz pdf (Strona 17)

Publication 1794-6.5.11 - September 2011

Overview of the Frequency Input Module 7

Selecting the Modes of Operation

You configure the frequency input module for these modes of operation:

Output Capabilities

The frequency input module has 2 assignable outputs. These outputs are

designed for applications that require fast response. The outputs:

• are current sourcing at 10…31.2V DC (1 A maximum per output)

• are electrically fused (current limited to 3 A)

• can be assigned to the associated input channel with user-selectable

frequency and acceleration values

• are isolated – this lets you use two separate external power supplies if

desired (one for output 0 and one for output 1)

Implementing Application Features

You can use the module to implement programmable application features that

are usually initiated by your controller processor. This frees up the controller

Modes of Operation

Mode Use this mode to Indicators /

Alarms

Scaler /

Values

Frequency and

% Full Scale

•Monitor the frequency of an input with high

accuracy (for example, shaft)

•Monitor the percentage of full scale frequency

•Operate frequency alarm (% full scale)

•Scale the frequency

•Monitor the direction of shaft rotation

•Wire-off alarm with DC devices

•Missing pulse alarm

Frequency and Acceleration •Monitor the frequency of an input with high

accuracy (for example, shaft)

•Monitor the acceleration (rate of speed change)

•Operate acceleration alarm (rate of change)

•Scale the frequency

•Monitor the direction of shaft rotation

•Wire-off alarm with DC devices

•Missing pulse alarm

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Rockwell-automation 1794-IJ2XT FLEX I/O Frequency Input Modules User M Instrukcja Użytkownika Strona 17