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AppBox C21

  • C21 AppBox Top
  • C21 AppBox Top Panel
  • C21 App Board Block Diagram
  • C21 App Board assembly
  • C21 AppBox Top 2
0.50 LBS

Product Description


Need help deciding which AppBox will best support your requirements? Please refer to the comparison guide HERE.


Hardware Features

  • Atmel SAMC21J18A processor (ARM Cortex-M0+) Maximum Frequency - 48 MHz.
  • Operates on +12 to +24 volts DC (ideal for industrial/battery applications)
  • Provides CAN interface for industrial systems
  • Provides RS-485 communications for industrial systems
  • Modular I/O expansion via up to three (3) AppIO Boards.
  • Atmel X PLAINED compatible
  • Fully enclosed system with knock out panels for AppIO Boards
  • Convenient enclosure mounting holes
  • Front panel push button switch
  • Front panel programmable LED
  • Atmel-ICE debug header present for development

Hardware Specifications

  • Power Consumption: Less than 500mA at +12V
  • Board dims: 4.15 in(105 mm) x 2.36 in(60 mm) x 0.059 in(15 mm)
  • Enclosure (with flanges): 5.83 in(148.26 mm) x 5.13 in(130.5 mm) x 1.10 in(27.94 mm)
  • Operating Temperature 0 to +70C
  • RoHS compliant

Software Features

  • Compatible with Atmel starter kit software


  • This module is designed to be used in an industrial environment with a CAN, RS-485, or LIN interface and provide flexible, modular I/O for specific applications. These I/O modules (Extension Boards) allow the application to be customized to fit in a CAN, RS-485, or LIN communications environment.


  • Atmel ATWINC1500-CPRO Extension Board
  • Sensirion SHTW1 XPLAINED PRO Extension Board
  • Sensirion SHTC1 XPLAINED PRO Extension Board



  • AppBox C21 board assembly in Enclosure
  • Power input terminal block header
  • Product information card

Support Documentation


Warranty Information

30 Day Warranty

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