Matrix BACNET, Руководство пользователя, Страница: 12 / 46

W
HEN
W
OULD
I U
SE A
R
OUTER
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P
RODUCT
O
VERVIEW
1-6
MATRIX BACnet Router User Manual (6/6/2007)
1.2.3 M
ULTI
-B
UILDING
C
OMMUNICATIONS
Many of the communication capabilities within BACnet/IP are dependent on the use of broadcast
messaging. In most IT networks, broadcast messages are blocked or forbidden.
To allow multiple BACnet/IP networks to communicate as flexibly as other traditional Ethernet protocols,
select MATRIX BACnet Routers can be configured to act as a BACnet Broadcast Messaging Device
(BBMD). A BBMD will take broadcast messages originating from one network and forward them onto other
defined networks that have a BBMD or MATRIX BACnet Router configured as a BBMD.
Figure 1-3 BACnet System Architecture with BBMD
In the example above, messages originating from the head-end or either control network using a MATRIX
BACnet router can be distributed throughout the entire system in a logical and straight-forward approach.
Providing BBMD capabilities within the MATRIX BACnet Router avoid possible network security issues in
an existing IT network.
NB-VAV
VAV Boxes
NB-ASCe
Packaged Equipment
NB-ASCe
Packaged Equipment
ipment
its
SBC-STAT3
Can be used on
all NB Controllers
75°
F
SBC-STAT3
Can be used on
all NB Controllers
75°
F
MATRIX-RTR-BBMD
Network Controller
BBMD Enabled
Auto-Pilot
with BACnet Driver
BACnet/IP ; BACnet/Ethernet
BACnet/MSTP
STATbus
WAN/Internet
IP Subnet 3
IP Subnet 1
IP Subnet 2
NB-VAV
VAV Boxes
quipment
NB-A - S A A Ce
Packa kk ged Equipment
ent
s
SBC-STA T T
Can be u
all NB Co
75°
F
SBC-STA T T T A A 3
Can be used on
all NB Controllers
75°
F
MATRIX-RTR-BBMD
Network Controller
BBMD Enabled