ProtoCessor ASP

The ProtoCessor ASP (Application Specific ProtoCessor) OEM IIoT gateway is a low-cost TTL to RS-485 embedded coprocessor module that enables original equipment manufacturers (OEM) to connect to the cloud and rapidly implement various industrial, building, and machine automation protocols in their products. It is the ideal solution for high-volume/cost-sensitive applications that require device management through the cloud and quick protocol support.

OEMs can enjoy the benefits of the cloud connectivity through FieldPoP™. The ProtoCessor ASP is FieldPoP-enabled, meaning all ProtoCessors 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 ProtoCessor. These applications offer functionality for configuration, monitoring, logging, security, diagnostics, and updates.

Learn more about FieldServer and FieldPoP capabilities »

The ProtoCessor ASP has expanded upon the proven ProtoCessor FFP concept, with the addition of two new features: DIP switches and Expansion I/O Interface. The DIP switches provide the OEMs with plug-and-play solutions with no software required to install the ProtoCessor on the various protocol networks. The optional Expansion I/O Interface allows for maximum flexibility when integrating the ProtoCessor protocol gateway into an OEM device.

The ProtoCessor ASP is RoHS Compliant and ISO 9001 registered. These approvals and certifications assure our customers that we carry only the highest quality of products and performance.

ProtoCessor ASP

  • FieldPoP Device Cloud support: Register your ProtoCessor to the FieldPoP interface for remote access to local applications, configuration, and device management
  • Rapid Time-to-Market – Minimize coding and hardware demands or changes to current OEM design
  • Reduced NRE – Reduce costs on purchases of source code and engineering time
  • TTL Form Factor – Fits on any OEM’s PCB circuit board hardware for maximum flexibility and ease-of-installation
  • RS-485 Field Port – Lower costs with high volume devices can justify to have automation protocols such as BACnet, Metasys N2, and Modbus.
  • DIP Switch – Easily install into OEM with plug-and-play solutions
  • Expansion I/O Interface – Integrate the protocol gateway into an OEM device with maximum flexibility
  • 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 – Enable manufacturers to pre-load multiple predefined configurations
    • Store multiple predefined configuration files
    • Select the active configuration file with DIP switches on the fly
    • Up to a maximum of 1000 Modbus registers can be included in a configuration file

Specifications for ProtoCessor ASP

Field Connections

  • RS-485 3 way Phoenix Connect: No terminating resistors for RS-485
  • 20 Pin expansion 12 pin General Purpose I/O: 20 pin header laid out for Board-to-Board or Board-to-Wire or use a ribbon cable
  • Optional: 20 socket expansion port designed to plug into 20 pin port on OEM board

Host Connections

  • Standard Serial TTL Interface: TX and RX
  • ProtoCessor Socket on Board: 2 x 10
  • Expansion Connector: 20 Pin


  • FPC-AD2 and FPC-AD3: 5 VDC @ 120 mA
    • Upon request: supported range 4.5 V – 15 VDC
  • FPC-AD3 and FPC-AD5: 3.3 VDC @ 110 mA


  • Ambient: -40o to 185oF (-40o to 85oC)
  • Storage: -40o to 257oF (-40o to 125oC)
  • Humidity: 5 to 90% RH

Dimensions (L x W x H)

  • 2.2 x 1.2 x 0.5 in. (5.6 x 3.0 x 1.3 cm)

Protocol Drivers

The ProtoCessor ASP OEM protocol gateway from Sierra Monitor supports the following protocols:

    No Profiles Found

How to Purchase the ProtoCessor ASP

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