BDT (Broadcast Distribution Table)


Max. number of BBMDs (BACnet Broadcast Management Devices) in a BACnet internetwork. If a BACnet router is in its own IP segment, it must be configured as a BBMD.

FDT (Foreign Device Table)


Maximum number of foreign devices which can register with the BACnet router.

Desigo CC in a remote IP segment counts as a foreign device.

Ethernet bit rate

10/100 Mbit/s

The router supports 10/100 Mbps.

MS/TP telegrams

[100 - 140] pkt/s @115,200 bps

[-120] pkt/s @76,800 bps

Max. [~4,5] KB/s

The BACnet router integrates BACnet MS/TP not as a field bus in the network. The router operates transparently and routes all data traffic addressed to the subnet. This is why global broadcast telegrams negatively impact transmission performance of the router and end devices.

Recommendation: Do not carry out time and security-critical process controls using BACnet MS/TP.

Depends on baudrate, number of nodes and maximum number of data frames (N max_info_frames).


[100 - 120] pkt/s @78 KB/s

Max. [~4,5] KB/s

The BACnet router integrates one (1) BACnet/LonTalk network. The router operates transparently. The same restrictions apply to global broadcast telegrams as for MS/TP.


[~2500] pkt/s

Max. [~500] KB/s

The BACnet router can route between two BACnet/IP networks. The BACnet/IP networks have different UDP ports.



The BACnet router integrates one (1) BACnet/IPv6 network. The router works transparent, but when connection ports for BACnet/IPv4 and BACnet/IPv6 are used simultaneously, make sure that no unintentional ethernet loops are created on the IT side.