-19-
The pulse outputs are open-collector circuits.
The collector branch has a resistance of just 0 ohm, i.e. there is no inter-
nal current limiting. If required, this must be provided by an external
protective resistance (*if not available on site).
The internal resistance of the switching device must be 5x of the protec-
tive resistance.
7. Due date function
The consumption values are stored in the memory on the set due date
and kept until the next due date. They can be read off the display or
transmitted over the M-Bus or optical interface. The due date can be
programmed as required.
Ex works default setting = 31.12 of the year of delivery.
8. Interfaces
The meter is equipped with various communication interfaces depending
on the variant selected:
Optical (standard)
Radio 434 / 868 MHz (OMS or Real Data)
Radio 868 MHz / L-Bus
Radio 434 MHz / L-Bus
M-Bus
Pulse
The Communication Description of the interfaces is available on the Inter-
net at
http://www.diehl.com/en/diehl-metering/products-solutions/product-
download/
Please select the partner "Diehl Metering GmbH" and the product area
"Water metering".
9. Operation
To show the data read by the meter in the display, various windows have
been created as functions that can be called up in succession to display
the assigned system information (e.g. ow rate, volume, date, due date,
medium temperature).
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