I have set this up using a JACE 6 with a LON card and driver, A BACnet server driver, and a fair amount of programming in Tridium AX. In the end it was well worth the effort. The project involved Trane Intelli Pack rooftops with LCI-I cards, Delta VAV controllers, and a ORCA View front end. Despite Trane's best efforts to be difficult, I still created a seamless integration.
The device you refer to is the one PicNik already has, and converts the BACnet on LON signal into a BACnet on IP (not to be confused with BACnet Ethernet which I understand to be significantly different).
I understand Siemens US are looking at a BACnet / MSTP PX based device in the future, and there may therefore be a Siemens solution to your problem. Don't hold your breath though, not sure when. In the meantime I will asl on the Euro DAS site to see if anyone there knows of a device.
Sorry, I worded the origional question wrong. Looking for a router rather than a gateway.
I have got a plug in card for an inverter that talks BACNet over MS/TP. I want to get it into a Siemens PX network that talks BACNet over LON, i.e. BACNet protocol but uses LON cabling. (Don't ask me why they'd develop it like that, as I've yet to get a decent answer from Siemens Tech Support, but it does appear in the BACNet standard as a valid transport media).
BACNet mstp and lon uses the same communication cabling. 2 conductor 22 awg wire.
BACNet and LON are two different communication protocols, so how do you talk bacnet over LON?
I suppose with Siemens Europe the only company doing BACNet/LON and their headend unable to scan a BACNet network for other devices, it makes it almost proprietory .
Anyway, thanks guys. I will have to wait for siemens to produce their own. I won't hold my breath as its unlikely they'll make one till they have an MS/TP device to sell (why promote interoperability!!!)
Don't be a stupid dwarf. It's not big and it's not clever!