I have got district heating and the meter I have is a Kamstrup Multical 401. Unfortunately there are no pulse outputs available on it, only two M-Bus outputs. One is of course used by the utility but I don't think the other is so useful as an input to Flukso..?
However there is an optical IR output on the meter which works according to IEC 1107/EN 61107. So, if I where to get an optical readout device (eg. http://kamstrup.com/media/503/file.pdf or similar) and convert the USB or RS232 to RS485 would that work with the Fluksometer?
From the manual :
9.2 Data/pulse output
The pulse output is used e.g. for remote counting of energy.
1 pulse is emitted per display count for energy, e.g.
1 pulse/kWh, when MULTICAL® 401 is programmed
for a flow sensor of qp 1.5 m3/h.
connection : 16 - 17
Thanks, but I have already checked that and unfortunately my meter doesn't have any pulse outputs but two M-bus outputs. I have even opened the meter and checked the screw terminals. Back to my question?
I couldn't find any M-bus master transceiver chip. There is the TSS721A M-bus slave transceiver. However, that one isn't recommended for new designs. It seems that the M-bus 2-wire physical layer isn't that popular.
The IEC1107 standard has been superseded by IEC62056-21:2002. Do you know what application-layer protocol is being used on top of this phy? Is it M-bus as well, i.e. EN1434-3?
I don't think it is M-bus application on the optical readout device. Unfortunately I am not too familiar with the application layer on EN61107.
On the screw terminals 24-25 it is definitely (wired) M-bus. I think Kamstrup follows the open standard (EN1434-3) pretty well. In some cases though they are known to mix up primary and secondary M-bus addresses.
Wonder if this works M-Bus -> RS485 or if it is designed only to work the other way around?
http://www.baer-gmbh.com/downl.en/ConverterMBusRS485.pdf
This converter takes up the role of slave at the M-bus side while we should have a device acting as master instead. The meter itself will be an M-bus slave.
Exactly, that was what I thought. Looked too good to be true. ;)