Danfoss AK-LM 330 Design Manual page 69

Voltage signals (5)
The function can be used for:
• Voltage detection
• Voltage monitoring with alarm function
• Voltage monitoring with relay function
An example could be monitoring of a leak detector
The function can use one of the voltage readings V1, V2, V3,... etc.
The following signals can be received:
• 0-5 V
• 1-5 V
• 0-10 V
• 2-10 V
A current signal can also be detected if external resistances are
placed on the input so that the signal is adapted.
The signal is scaled. E.g. to 0 for min. value and 100 for max. value.
The function uses the scaled values for settings and readings.
Cut-in and cut-out limits are set for the relay. The relay is connect-
ed based on the current live voltage.
Alarm limits can be set for low and high values including separate
alarm delays.
The individual functions can be adapted to the current use as it is
possible to name the function and customise alarm texts.
Each voltage control has the following available functions:
• Name
• Display of the current reading
• Selection of relay function
• Display value that represents the input signal's min. value
• Display value that represents the input signal's max. value
• Setting the cut-out value for relay + delay time for cut-in
• Setting the cut-in value for relay + delay time for cut-in
• High alarm limit
• Delay time for 'high alarm'
• Alarm text for 'high alarm'
• Low alarm limit
• Delay time for 'low alarm'
• Alarm text for 'low alarm'
AK-LM 330 RS8FR302 © Danfoss 2015-08
Alarm inputs (on/off signals)(16)
This function can be used to monitor an external signal.
The function can receive the following signals:
• 0 / 24 V on a low voltage DI input
• 0 / 230 V on a high voltage DI input
• Open/closed input for an analogue input
Each alarm input has the following available functions:
• Name
• Reading of the current status of the input (the overview display)
• Selection of alarm function
• Selection of relay function
• Delay time from detection to alarm and relay change
• Reading of the current status of the alarm
• Alarm text
• Alarm history with the following information:
- On time in% for the last 24 hours
- Total On time
- Number of changes in the last 24 hours
- Total number of changes.
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