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BACnet Gateway
unit 1
n is the unit quantity (refer to Chapter 4.2).
Dial-up setting graph for the matched resistance：
0
1
1
2
4 Application
Generally, the application occasion for BACnet gateway is building management
system.
4.1 Building Management System (BMS)
This gateway adops BACnet standard protocol. It can connect to BAS system
or Builidng Management System（BMS，Building Management System). It realizes
the monitor of building management system to unit (RS485 Bus) through BACnet
gateway.
4.2 Internet Topological Graph
Network topology instruction of 485 bus:
Internet for RS485 bus: the black wire is RS485 bus, which is consisting of
BACnet gateway and all IDUs and ODUs of the system. One RS485 Bus internet
can be connected to maximum N unit(s).
System: one system is a bus internet, consisting of one gateway and 1-N unit(s)
(including the subordinate IDU and ODU).
The admissible unit quantity for BACnet gateway: one BACnet gateway can
be connected to a maximum of N unit(s) (including the subordinate IDU and ODU).
485 Bus
unit 2
3
4
5
6
7
function
Not set to be with the
matched resistance
not with the
matched
resistance
7
8
is the location for dial-up button
8
......
unit n
with the
0
matched
resistance
1
7
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