M-o-a-T on KNX

The MoaT bus over KNX

MoaTbus uses the NCN5120 bus coupler. This IC supplies sufficient 3.3V power and implements the KNX data link.

Physical layer

As per the KNX standard.

Link layer

As per the KNX standard.

MoaTbus uses three dedicated group addresses: 15/7/251 for broadcasts, 15/7/252 for address assignment, 15/7/253 for assignment replies. Sender and recipient addresses are part of the link layer. The physical source address used for address assignment requests shall be 15.15.254.

The MoaT master's address is not fixed; the slave must use the address where its assignment reply originated from.