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Wired M-Bus interfaces are available for connecting of up to four additional pulse inputs and with one
pulse output, the pulse I/O interfaces with a maximum of four auxiliary pulse inputs and one pulse
output, a Wireless M-Bus interface, and an USB interface.
Interface M-Bus Pulse OUT Pulse IN
M-Bus + 4 pulse inputs + – 4
M-Bus + 2 pulse inputs + 1 pulse output + 1 2
4 pulse inputs – – 4
3 pulse inputs + 1 pulse output – 1 3
Wireless M-Bus – – –
USB – – –
7.1. Wired M-Bus interfaces and pulse I/O interfaces
Data reading with the M-Bus communication interface is based on the transmission protocol compliant
with PN-EN 13757-3:2005 and PN-EN 1434-3:2009. The implemented protocol enables primary ad-
dressing with 1-byte network addresses, secondary addressing with the 8-digit customer identifier and
extended secondary addressing with the serial number.
The following is the list of data read over M-Bus:
• heat meter serial number
• customer/user number
• current date
• heat consumption
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