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PRODUCT OVERVIEW WHEN WOULD I USE A ROUTER?

MATRIX BACnet Router User Manual (6/6/2007) 1-5

1.2.2 MULTI-VENDOR MS/TP INTEGRATION

A BACnet router is commonly used to third-party vendor BACnet MS/TP products. This approach allows

foe each vendor to communicate on their own physical network without disrupting communications on

another network that may contain another third-party vendor.

Although the BACnet standard defines specific characteristics for each communication layer, vendors are

permitted to implement optional features that could effect network bandwidth performance negatively. For

example, a manufacturer may not support specific MS/TP baud rates or implement slower timing

characteristics. For this reason, isolating vendors from one another using a BACnet router has become

common practice in multi-vendor installations.

Figure 1-2 Example of a BACnet Network with Third-Party Devices

In the example above, MATRIX BACnet Routers are used to isolate EIA-485 networks between different

manufacturers. When integrating with third-party MS/TP devices, American Auto-Matrix recommends

using a MATRIX BACnet Router to isolate vendors to their own communication bus. This practice will

greatly reduce the potential for communication issues.

NB-VAV

VAV B oxes

NB-A

Packa

NB-A

Packa

ipment

ems

nits

SBC-STAT3

Canbeusedon

all NB Controllers

75°

SBC-STAT3

Canbeusedon

all NB Controllers

75°

MATRIX-RTR

Network Controller

Auto-Pilot

with BACnet Driver

Web-Pilot

MATRIX-RTR

Network Controller

Vendor ABC

BACnet/IP ; BACnet/Ethernet

BACnet/MSTP

STATbus

WAN/Internet

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 45 46

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