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The FieldServer protocol gateway makes it easy for integrators to interface devices utilizing various building or industrial protocols. As the leading manufacturer of protocol gateways in the building automation industry, MSA Safety has developed the largest driver library in the industry and the widest range of gateways available, designed to meet the needs of system integrators.

The FS-B3510-05 provides a wealth of features to enable data transfer between different devices and networks utilizing serial (RS-232 or RS-485), Ethernet, and LonWorks. The multiport design allows for serial-to-serial, serial-to-Ethernet, and LonWorks interfaces. With a larger point count than any similar gateway, the FieldServer FS-B35 series provides a single device solution for your networking
needs. The FieldServer is designed to meet a wide range of interface needs and it is easily configured as a master or a slave.

The FieldServer Toolkit with the updated browser-based interface makes it easy to find specific FieldServers on the network and provides a user-friendly method to determine status, network settings, node information, map descriptors, and more. The interface also makes it easy to transfer files to update FieldServer in the field.

Configuration is easy, but if needed, configuration services are available from the MSA Safety support team. The proven FieldServer support team is recognized around the world for its knowledge of the many different protocols involved in building automation.

MSA Safety continuously strives to enhance our gateways and The latest FS-B35 series includes a major software upgrade, resulting in
significant enhancements in performance, including:

  • 40% higher point count capability – some protocols are major memory hogs, and the result is that they can slow down the performance of any gateway. With the greater memory enhancement, the FS-B35 Series can easily handle all of the drivers extremely well.
  • Memory utilization monitoring – the user is provided with application memory statistics (in both kB and as a percentage of the available memory) enabling optimal matching of device models and configurations to specific applications.
  • Improved stability and performance under high loads – the new software enhances the operation making it more forgiving to configuration problems with fewer crashes when capacity limits are reached.
  • USB firmware update – this allows the firmware or configuration of the FieldServer to be updated from a USB flash drive whenever it is inserted, enabling users to easily update the firmware in the field. This is a great time saver if you have multiple FieldServers in the field.

The product includes four serial connections (two RS-232, two RS-485), two 10/100 Ethernet ports, and a LonWorks (Free Topology – FT) port. The multiple ports and support for simultaneous protocol execution allow the Multiport Gateway to be used in the most complex integration scenarios. The availability of the second Ethernet port enables the integrator to connect a PC to download configuration changes without disturbing the system connections and without the additional cost of an external hub for the protocol gateway.

Multiport Protocol Gateway units can be configured in the field, with all the necessary instructions and software included with the product. If the user prefers the unit to be pre-configured prior to delivery, MSA offers a custom configuration service.


  • Allows integrator to complete any project with any protocol on-time
  • Full compliance with standards allows integrator to complete projects quickly without downstream interoperability issues
3. 1000 TO 10000 POINTS
  • Sized for the largest integration projects
  • RS-485 x 2, Ethernet x 2, LonWorks (FT), RS-232 x 2
  • Perform quick diagnostics, troubleshooting, easy IP details set-up, and status updates
  • View application memory statistics to enable optimal matching of device models and configurations to specific applications
  • Easily update the firmware or configuration of the Multiport Gateway through a USB flash drive or the Toolbox
Field Connections
  • Ethernet Ports: 2
    • 100 BaseT RJ45 connector (auto MDIX and sensing) with ESD protection
  • Serial Ports: 5
    • 2 x RJ45 RS-232 galvanically isolated with ESD protection
    • 2 x RS-485 galvanically isolated with ESD protection
    • 1 x RJ45 RS-232 system port
  • LonWorks: 1
    • FTT-10 twisted pair
    • 1000 Network variable capability
    • LonWorks service pin
  • Auxiliary Ports: 2
    • 2 x USB ports
    • Expansion: Fieldbus connectors available for selected protocols

Power Requirements

  • 24 VAC (+/- 10%) or 12-30 VDC @ 12W


  • Operating temperature: 32o to 140oF (0o to 60oC)
  • Relative humidity: 10-90% RH non-condensing


  • Dimensions: 2.0 x 6.3 x 5.4 in. (5.0 x 16.0 x 13.7 cm)
  • Weight: 2.5 lb. (1.5 Kg)


  • Configuration/Diagnostic utilities
  • The base system has 1000 point capability (upgradable to 10,000 points)


  • Drivers available for a wide range of Ethernet and serial protocols

Mounting Options

  • Desktop, Wall, Panel
  • Optional: DIN rail


  • Drivers available for a wide range of Ethernet and serial protocols


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