The Babel Buster BB3-7301 BACnet Router routes BACnet messages between BACnet IP and BACnet MS/TP networks. The BB3-7301 BACnet Router can be a learning router or configured router, and includes BBMD support. The BB3-7301 BACnet Router also provides slave proxy capability to answer to Who-Is messages on behalf of devices that do not support dynamic binding.

The Babel Buster BB3-7301 BACnet Router can also operate as a BACnet gateway, reading and writing other BACnet devices and retaining a copy of object values in its own set of BACnet objects. The BB3-7301 provides a Modbus TCP client and server for operation as a gateway. The BB3-7301 can be used as a Modbus TCP to BACnet MS/TP gateway without routing.

BB3-7301 BACnet Router Functionality

The BB3-7301 is an upgrade alternate for BB2-7030 offering higher performance at a lower cost. Routing efficiency is improved and gateway capacity increased. The BB3-7301 also provides a secure (https) web user interface.

Feature Highlights
• BACnet Router, IP to MS/TP
• Configured or learning router
• BBMD support for WAN connectivity
• Slave proxy for static address binding support
• BACnet Client/Server gateway for remapping BACnet objects
• Up to 5,000 BACnet Objects and 5,000 Modbus Holding Registers
• BACnet Input, Value, Output objects for Analog, Binary, Multistate
• Modbus TCP client/server
• FCC, CE Mark, UL 916 Listed, BTL Certified
• Software Included, No Drivers to Buy

Babel Buster BB3-7301 BACnet Router plus Modbus Gateway

Babel Buster BB3-7301 BACnet Router

Order code: BB3-7301
Retail price: $739.00

 Buy BB3-7301 Online Now!

 Save Even More
Sign Up for Wholesale


Control Solutions’ Babel Buster BB3-7301 is a BACnet router, slave proxy, and client/server gateway that allows remapping objects from multiple slaves into one master. You can use the BB3-7301 as just a router, just a client/server, or both at the same time. The BB3-7301 also includes BBMD support. The BB3-7301 is a performance upgrade of Control Solutions’ original BB2-7030 BACnet router.

The BB3-7301 as a BACnet Router will route IP to MS/TP and vice versa via its local ports, and supports full router capability for multi-hop internetworks including via NAT WAN routers. Routing is simple to set up. Routing can be used without any other gateway features enabled.

The BB3-7301 as a BACnet Slave Proxy will provide I-Am responses on behalf of MS/TP devices that do not have I-Am support, or are slave-only devices. The slave proxy capability will allow systems to utilize dynamic address binding with devices that do not support dynamic binding.

The BB3-7301 as a BACnet Client/Server Gateway will poll BACnet IP and/or BACnet MS/TP slaves or servers, and retain copies of selected object properties. Upstream clients may then query the BB3-7301 to receive data originating from multiple devices. When used as a gateway, the BB3-7301's routing can be disabled to avoid conflict with other routers on the network.

The BB3-7301 includes a Modbus TCP client/server that provides optional BACnet to Modbus gateway capability. Value objects will poll their assigned Modbus register at the interval you specify. The content of the Modbus register will be given as the Present Value of the BACnet Value object when read. The Modbus register is written each time the BACnet Value object is written. The Value object corresponds well with the Modbus Holding register.

As a Modbus gateway, Input objects will poll their assigned Modbus register at the interval you specify, and provide the Modbus data as the Present Value when read. Commandable Output objects can be used to write Modbus registers, and will update the Modbus device each time BACnet is updated.

The BB3-7301 includes its own internal web server that provides a web based user interface for configuring the BB3-7301. Configuration is done using simple templates, and each web page has an online help section at the bottom.

Screen shot from BB3-7301 BACnet IP to MS/TP Router

Click on the link below to view a demo copy of the entire Web UI in the BB3-7301.

 BB3-7301 Demo Web


BB3-7301 Features

• BACnet IP to MS/TP Router
• Configured or learning, I-Am route learning, I-Am-Router route learning
• Slave proxy to support MS/TP slave-only devices
• Client/Server gateway for remapping BACnet objects
• Read/Write any standard BACnet objects as a Gateway
    • Up to 5,000 objects
    • Analog, Binary, Multi-State object types
    • Input, Output, Value objects
• Commandable BACnet objects implement priority array
• BBMD, COV support
• BB3-7301 is also Modbus TCP client/server
• Bidirectional data exchange between BACnet and Modbus
• Supports Modbus coils, discrete inputs, input registers, holding registers
• Supports signed, unsigned 16-bit, 32-bit, 64-bit integer Modbus registers
• Supports IEEE 754 floating point (32-bit and 64-bit) Modbus registers
• Supports Mod-10 format (2, 3, 4-register)
• Modbus register mapping configured via secure web interface
• Modbus registers may be scaled (x10, x0.1, etc.)
• Modbus (master) polling interval configurable per point
• User defined Modbus register map for Modbus server
• Built-in data scaling for units conversion
• Support for packed holding registers
• Direct import of CSV files for faster point mapping
• Hardened EIA-485 transceiver for BACnet MS/TP
• 10/100BaseT Ethernet for BACnet IP and Modbus TCP
• Configure via secure web pages with password protection
    • TLS 1.2
    • RSA-1024/SHA-256 self-generated certificates
    • Supports externally generated certificates
• Flash file system with XML configuration files
• Field upgradeable firmware
• Includes “10X” file capacity
• Powered by 10-30VDC or 24VAC 50/60 Hz
• Power Consumption: 0.1A @ 24VDC
• DIN rail mounting, 100mm H x 70mm W x 60mm D
• Pluggable screw terminal block for power & RTU network
• Operating temperature -40°C to +85°C
• Humidity 5% to 90% non-condensing
• FCC Class A, CE Mark, BTL Certified
• Listed to UL 916 and (Canadian) C22.2 No. 205-M1983

Maximum Object Counts and System Capacities for BB3-7301

• BB3-7301 Object Pool allows up to 5,000 BACnet objects. The object pool may be allocated among the following object types, with a minimum of 1 per object type: Analog Input, Analog Output, Analog Value, Binary Input, Binary Output, Binary Value, Multi-state Input, Multi-state Output, Multi-state Value.

• Maximum 1024 states for Multi-state objects with state text, actual number of objects/states supported varies by resource usage per object.

• BB3-7301 allows user allocation of memory resources. Memory capacity will not support maximum counts of everything possible, but maximum count limits are set high so that you can allocate resources where you need them. For example, you can have 5,000 BACnet objects and 5,000 read maps - but not 5,000 of each type of read map. Most applications will only use one type of read map anyway.

• Maximum BACnet object count 5000
• Maximum BACnet IP device count 200
• BACnet IP Client read map count 5000
• BACnet IP Client write map count 5000

• Maximum Modbus TCP device count 200
• Modbus TCP Client read map count 5000
• Modbus TCP Client write map count 5000

BB3-7301 Video Library

Watch these videos for an introduction to configuring the gateway. It's easier than reading!

Introduction to the BB3-7301 BACnet Router

Configuring BB3-7301 BACnet Router

Configuring BB3-7301 BACnet Server

Configuring BB3-7301 BACnet Client

Configuring BB3-7301 Modbus TCP Client

Configuring BB3-7301 Modbus TCP Server

CSV to XML Conversion Tool

Babel Buster Configuration Builder

You would normally use the web pages found in the gateway itself to configure the gateway. But you may be able to take a shortcut if you have a long list of registers already in CSV file format.

The Babel Buster Configuration Builder is used to facilitate building of configuration files (aka "profiles") for Babel Buster network gateways by converting XML files to CSV files and vice versa. This simplifies the process of creating or changing a large number of entries because you can use any standard spread sheet program to manipulate the content of one or more CSV files, and then convert that into an XML configuration file that can be loaded into the gateway. If the gateway will be reading a long list of Modbus registers, for example, you can sometimes just copy a list of registers from another source, paste into a simple text file, and import that into the spread sheet program. Then add a header line to label the content, add a handful of additional columns, and you quickly have most of a complete configuration. Very often, the only thing that changes from one line to the next is the register number. The other entries can be quickly made by entering once and using the spread sheet program's "fill down".

The Babel Buster Configuration Builder simplifies the process of making global changes to a large number of gateway register or object "maps". The gateway “converts” protocols by querying devices on one network with one protocol, and then saving that data internally so that it may be accessed on another network using a different protocol. The designation of what should be queried is referred to as a “map” in the gateway. In most applications, most or all maps are “read” maps, meaning the gateway will read data from some other device. A “write” map will write data to that device. Most often the gateway will actively read data from a device and passively wait for another device on the alternate network to query the gateway to obtain that data. But it is also possible to configure the gateway with two sets of maps, one to actively read device A using protocol A, and then actively write that data to device B using protocol B. The process can also be reversed, and can be done concurrently. You may both read and write data on one network while writing and reading data on the other network.

What to Expect from the Conversion Tool

The point of this configuration builder is to simplify the process of entering long lists of registers or objects. Where most of the parameters are the same for many maps, using a spread sheet program's "fill down" makes the process fast and easy.

There are situations where creating a CSV file for configuring some aspect of the gateway is actually going to create more work than simply using the web UI or PC based software to directly configure that aspect. Configuring the Modbus RTU port baud rate is one such example. There is only one setting. A CSV file would create more work rather than less, as intended. Therefore, the configuration builder only supports CSV import/export for those aspects of gateway configuration that involve long lists of largely replicated parameters. There are a very limited number of list type entries that are not supported in part because they are seldom used, and in part because very little of the list is replicated from one entry to the next. The BACnet Broadcast Distribution Table is one such example.

Do note, however, that if you have already done a lot of configuration, have saved that to an XML file, and want to add a list from a CSV file, you can do that. Refer to the section in the user guide that talks about modifying an existing configuration.

Get the Tool Now!

This tool is free and available for download now. Unzip and run the bb-builder-setup.exe file. Open the program, and click the help icon (blue question mark in upper left corner) to access the user guide. The very first section tells you how to get started.

NOTE: Version 2 of the configuration builder tool supports BB3-7301 file formats, and supports upgrading XML files from BB2-7030 format to BB3-7301 format. Also do note that the BB3-7301 can import CSV files directly. If you have a compatible CSV file ready to go, just upload that into the BB3-7301 - no need to convert to XML first.

Download the Babel Buster Configuration Builder here.

CSV to XML Conversion Tool

Configuration Service

Need even more help with your network gateway configuration task? We can do the configuration for you, or at least give you a big head start. We are working on building a library of configuration files for commonly used devices. If yours isn't already in the library, we will add it. To get started, open a support ticket and attach a copy (typically a .pdf document) of whatever documentation you have for your device. In addition, provide a list of the registers or objects you want to read or write. Of course, you can also start by asking if we already have that device in our library. If you have a proprietary application that you do not want included in our library, you can hire us at a very reasonable rate to do custom, proprietary configuration work for you, too.

Our most extensive technical support is provided by the same engineering staff that developed the products. Your personal attention from this staff is available via the support ticket system.

No user/password is required to open a new ticket. Once you open a ticket, you will immediately receive an email with your ticket number. Your ticket number becomes your login to review your ticket(s) later. Click the Support Ticket icon anywhere you see it. (If you do not get an email with your ticket number, within minutes, check your junk folder, spam settings, etc, and try again if necessary.)

 Open a Ticket