BACnet Sensor Bridge
How to install your BACnet Sensor Bridge
Julien Stamatakis avatar
Written by Julien Stamatakis
Updated over a week ago

Senseware’s BACnet sensor bridge has two sets of identical inputs connected on the same bus. This allows for simple daisy-chaining with other BACnet MS/TP devices on the network. When used in conjunction with an optional BACnet MS/TP to IP router, the sensor bridge can also communicate with BACnet/IP devices on the network.


The three connectors are labeled +, -, and X, as shown in the figure below. Connect ports + and - on the sensor bridge with their counterparts on the BACnet meter. These ports might be labeled A and B on the BACnet device. Traditionally, A refers to negative polarity (-) and B refers to positive polarity (+). However, it is possible that a meter’s A port will refer to positive polarity (+) and its B port will refer to negative polarity (-). If you are having trouble communicating with a BACnet meter, try switching the cables. If a cable shield is present, connect it to the X port on the sensor bridge.


Wires only need to be connected to one set of wire terminals on the BACnet sensor bridge. The second set of wire terminals is provided for convenience and ease of installation when the BACnet sensor bridge is not located at an endpoint of the network. In most cases, only one BACnet sensor bridge is all that is needed for a given BACnet network.Once the BACnet sensor bridge is properly wired, connect it to an available port on the node and power the node.

For web configuration information, click here.

Technical Specifications:

Power: 3.3V DC from node or gateway via micro-USB connector
Inputs: 2 x 3 Wire RS-485
Bridge Output: Up to 400 Read operations from up to 50 unique devices
Size (inches): 2.1 x 2.1 x 0.4
Weight (ounces): 0.8

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