Is this kWh counter possible to connect towards Flukso?

Hi

I want to connect my solar system to the flukso.
In Belgium we have a GSC kWh counter.

My type = 3 phase CARLO GAVAZZI EM-23 DIN
Some info:
http://www.norelco.fi/UserFiles/File/kayttoohje_FIN_ENG_EM23DIN%20IM%20M...
http://www.productselection.net/PDF/UK/em23dinds.pdf

I has an output Open collector type (single pulse output) / I don't have the S0 version :-(
Can this be used for Flukso monitoring?

gebhardm's picture

Open collector is just fine - directly connect terminals 42 to (+), 41 to (-) of a FLM pulse port and set the pulse constant to 10 corresponding to "Pulse output: 1 output 100 pulses per kWh." (10Wh/pulse)
See the manual, page 7, bottom: S0 is an open-collector interface standardized in DIN EN 62053-31

PhilippeG's picture

Thanks for the answer Markus
Will test it first with my Youless if it works

PhilippeG's picture

Other question related to it:
Can you combine 2 x GSC kWh counters to 1 input on the FLM
Or will this give strange outputs due the fact soms pulses can get lost ?

gebhardm's picture

Pulse counting is triggered on "falling edge" and a pulse may be up to 100ms long; so if the pulses of two or more meters overlap you'll see only the last falling edge, thus get only one count - does that answer your question sufficiently? The probability, of course, increases the more pulses per kWh are produced (or the more energy you consume)

PhilippeG's picture

OK
Then I need to check for another solution.

I need 3 x clamps + 3 x S0
Or I need to place an extra kWh counter with S0 instead of the clamps

PhilippeG's picture

Markus

Do I need to place some transistor(s) between the output & flukso or is it plug & play?

The counter document gives:
The load resistances (Rc) must be designed so that the close contact current is
lower than 100mA; the VDC voltage must be lower than or equal to 30VDC.

gebhardm's picture

Plug and play - the FLM delivers the required current; the meter just switches.

gebhardm's picture

And as always; be aware of the polarity - red is black and plus is minus ;-)

PhilippeG's picture

Found my answer already in this topic
https://www.flukso.net/content/reading-3v-pulse-flukso-v2

The FLM's pulse ports are indeed designed to be compatible with an open-collector type sensor output. The + pin is connected to the internal 5V rail through a 30kOhm pull-up. A 'pulse' will be triggered by a high-to-low transition on the input, i.e. shorting the + and - inputs.