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Siemens  PXG3...    BACnet router for Ethernet - LONWORKS - MS/TP  CM1N9270en_10 
Building Technologies    2017-10-16 
Use 
The PXG3... BACnet router connects a BACnet/IP network to a BACnet/LonTalk 
network (PXG3.L only), and/or a BACnet MS/TP channel. BACnet objects are 
transmitted simultaneously throughout any and all networks.  
 
Router functions 
 
The PXG3... BACnet router transmits BACnet protocol between a BACnet/IPv4 
network, a BACnet/IPv6 network, a BACnet/LonTalk network (PXG3.L only), and a 
BACnet MS/TP channel. BACnet objects are simultaneously transmitted thoughout 
any and all networks. 
 
Broadcast Management Device, used to distribute BACnet Broadcast messages 
across IP Routers. 
 
The BACnet router includes a Device Object and can be operated by a BACnet 
Client. Present operating state, date and time as well as statistics on sent 
packages can be viewed via web server.  
 
The BACnet router can serve as a Slave Proxy for slaves that are connected to its 
MSTP port. In other words, it responds to Who-Is messages on the slaves’ behalf 
by sending an I-Am message. 
 
Simple Network Management protocol MIB-2, for monitoring and diagnosing the 
BACnet router network interface. 
 
Supports setup of a BACnet network over a NAT device. Additionally, remote 
access from a public network to BACnet devices is possible on a private network. 
Important: the public IP address must be static.  
For security reasons we recommend using VPN tunneling with BACnet NAT. 
 
For details see standard 135-2012 Annex J. 
 
When routing between BACnet/IP and BACnet/IP on one IP network, the BACnet 
router address must be the same on both BACnet networks. The difference is that 
different BACnet UDP ports are used on the BACnet network.