Description
3.9 Function of the digital inputs and outputs
SENTRON PAC4200
System Manual, 09/2009, A5E02316180B-02
47
The digital output is passive and implemented exclusively as a switch.
The implementation of the pulse shape corresponds to the IEC 62053-31 standard.
Pulse length, turn-off time
(1)
Pulse length
(2)
Turn-off time
Figure 3-16 Pulse length and turn-off time
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Pulse length:
Time for which the signal at the digital output is "high". The minimum pulse length is
30 ms and the maximum 500 ms.
●
Turn-off time:
Time for which the signal at the digital output is "low". The turn-off time depends on the
measured energy, for example, and can be days or months.
●
Minimum turn-off time:
The minimum turn-off time is specified by the programmed pulse length.
Functions of the digital inputs
The following functions can be assigned to the digital inputs:
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Tariff switching for on-peak and off-peak.
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Synchronization of the measuring period by means of the synchronization pulse of a
system control center or other device.
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Synchronization of the internal clock ("Top of minute").
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Status monitoring: Capturing statuses of connected signal encoders.
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Energy signal for active or reactive energy or freely definable energy types.
●
Starting and stopping the process energy counters and the process operating hours
counter
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Copying and resetting:
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All process energy counters
–
The counter for process active energy
–
The counter for process reactive energy
–
The counter for process apparent energy
