The ProtoCarrier enables original equipment manufacturers (OEMs) to rapidly and easily add cloud connectivity and building and industrial automation protocol translation support to new and legacy devices, without the time and expense of redesigning hardware.

Enjoy the benefits of the cloud connectivity through FieldPoP™. The ProtoCarrier is FieldPoP-enabled, meaning all ProtoCarriers can be registered to FieldPoP, Sierra Monitor’s device cloud for the IIoT. The FieldPoP web interface lets users remotely access, in a secure fashion, the FS-GUI and custom web applications that are available locally on the ProtoAir. These applications offer functionality for configuration, monitoring, logging, security, diagnostics, and updates.

Learn more about FieldServer and FieldPoP capabilities »

Sierra Monitor pre-programs the ProtoCarrier solution and maps each device to support the various protocols and configurations, including BACnet MS/TP, BACnet/IP, Modbus TCP/IP, LonWorks, and many others. No software or configuration files are required to install the device in the field.

The ProtoCarrier is developed for OEMs seeking rapid deployment of field protocol solutions, but who are also not ready to redesign their hardware. It is designed to be a full-featured, field-programmable OEM protocol gateway with multiple protocol support for any protocol translation between Serial, Ethernet, or LonWorks environments. As an example, a manufacturer might have five different devices, each requiring a variety of protocols to meet their customer’s interoperability needs. They can find their single source solution with the multi-protocol, multi-configuration ProtoCarrier, which has all the pretested configuration choices preloaded.

The ProtoCarrier is BTL (BACnet Testing Laboratories) Marked, LonMark Certified, DNP3 Conformance Tested, and RoHS Compliant. These approvals and certifications assure our customers that we carry only the highest quality of products and performance.


  • FieldPoP Device Cloud support: Register your ProtoCarrier to the FieldPoP interface for remote access to local applications, configuration, and device management
  • Rapid time-to-market – Plug-and-play solution to OEM device for rapid deployment without having to redesign the hardware
  • Serial, Ethernet, or LonWorks Environment Support – Provide multiple protocol support for any protocol translation as a full-featured, field-programmable OEM protocol gateway solution
  • Multi-Client Support – Ensure interoperability between any industrial and/or building automation protocols
  • BACnet COV (Change of Value) – Provide fast data communication while reducing traffic over a BACnet network
  • Web Configurator – Select the user profile to load multiple configurations
  • Advanced Auto-Discovery – Automatically discover known devices on the network and be configured to provide the protocol translation necessary
    • Easily support one or multiple of the same or different devices without having to build any specific configuration files
    • Automatically build the configuration file of known devices and download the file
  • Configuration Auto-Selector (via DIP switches) – Enable manufacturers to pre-load multiple predefined configurations
    • Store multiple predefined configuration files
    • Select the active configuration file with DIP switches on the fly
    • Utilizing the FS-GUI (Graphical User Interface), a different configuration file can be downloaded
    • Up to a maximum of 1000 Modbus registers can be included in a configuration file

Specifications for ProtoCarrier

Power Requirements

  • Power: 9-30 VDC or 12-24 VAC (RS-422 = 15-30 VDC or 12-24 VAC)
  • Current draw @ 12 V
    • FPC-C34 @ 12 V = 240 mA
    • FPC-C35 @ 12 V = 250 mA
    • FPC-C36 @ 15 V = 200 mA
    • FPC-C37 @ 15 V = 210 mA


  • Operating Temperature: -40o to 167oF (-40o to 75oC)
  • Relative Humidity: 5 to 90% RH, non-condensing


  • Dimensions (H x W x L): 1.2 x 2.2 x 4.2 in. (3.0 x 5.6 x 10.7 cm)
  • Mounting Holes: Six (6) holes for easy placement


  • Warranty: Two years

BACnet Support (BTL Marked)

  • Alarm and Event notification read properties  multiples, and more (see PIC Statement)
  • BACnet COV’s, 20,000
  • Support up to 2,000 Host & Field points
  • DIP switches are for setting MAC Address, Node-ID, Baud rate on the RS-485 Field protocol

LonMark Certification on the ProtoCarrier

  • SPID: 80:00:95:46:00:84:04:06
  • Profiles:
    • 0000 – Node object (1)
    • 0001 – Open Loop Sensor Object (5)
    • 0003 – Open Loop Actuator Object (5)


  • Various ProtoCessors have the following third party approvals:
    • BACnet Testing Labs (BTL) B-ASC
    • LonMark 3.4 Certified – ProtoNode LER Series
    • TUV approved to UL-916, EN 60950-1, EN 50491-3 and CSA C22-2 standards
    • RoHS Compliant
    • DNP3 Conformance Tested
    • CE & FCC Approved

Protocol Drivers

The ProtoCarrier + ProtoCessor solution can can be loaded with the necessary protocol drivers from Sierra Monitor's library of more than 140 protocols:

    No Profiles Found

How to Purchase the ProtoCarrier

The ProtoCarrier is currently reserved for OEM customers only. If you would like more information, contact us by: