Time-Synchronous Input; Additional Metering Input (Input 3) - Elster EK280 Applications Manual

EK280

5.5 Time-synchronous input

Any of the inputs 2 to 6 (terminals DE2 to DE6) can be used as a time-synchronous input. This means:
When the input poles are electrically connected, the clock is set to the full hour. However the following
conditions must be met:

The input pulse must occur within one minute to or past a full hour. Whichever is the time on the
EK280.

There can be only one synchronization per hour.
To program an input as a time synchronous input, send the relevant parameter files from the following to the
EK280 using the parameterization program "enSuite" (see chapter 3.6 "Send parameter file", page 17):

EK280 - Input 2 = Time sync. (*)

EK280 - Input 3 = Time sync. (*)

EK280 - Input 4 = Time sync. (*)

EK280 - Input 5 = Time sync. (*)

EK280 - Input 6 = Time sync. (*)
It is recommended, to seal one input for time synchronization, to prevent misuse.

5.6 Additional metering input (Input 3)

Each of inputs 2 to 6 (terminals DE2 to DE6) can be programmed as inactive information input.
i
For the connection to inputs 2-6 as additional metering input, only low frequency reed contacts or
transistor outputs with technical data in accordance with Chapter 3.6 (digital inputs) acc. to the
operating instructions for EK280 are suitable.
In this way, it is possible, for example, to connect and use further gas meters (or any other kind of meter)
with low frequency pulse output for recording. This means: If the "+" and "-" poles of the input x are of
sufficient duration (i.e., are electrically connected accordance with the preset pulse and period duration, the
input pulse is recognized and converted into a corresponding meter reading using the preset pc value (in the
specified units). This may also, for example, be the number of persons who cross a light barrier, or the
frequency with which a door is opened.
i
The use of the archived values for calibration purposes is only possible, if the input works as a
"repeating meter", so that it is possible to access the "calibrated values of the transmitting device,
where required!
The first step only produces a display of the meter reading determined at input 3 (abbreviation "V3"). In a
further application (see next Chapter) an additional archive is set up which records the values accordingly.
The inputs are already programmed as pulse inputs at the factory so that a conversion is usually
superfluous. To program input 3 back to metering, send the following parameter file to the EK280 using the
parameterization program "enSuite" (see Chapter 3.6 "Send parameter file", page 17):

EK280 - Input 3 = Counting input (*)
It is recommended to secure input 3 with a cover to prevent any misuse.
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