CPT-DFC1 - Dual Isolated UART USB


The CPT-DFC1 is a Communications Peripheral card within the DF Series Range. The card contains a dual UART isolated USB interface, isolated CAN interface, isolated Serial Peripheral interface (isoSPI format) and a real-time clock (RTC) with supercapacitor backup.

The card's isolated UARTs are powered from the USB interface, whilst all other isolated supplies are powered via the DF Series Communications Interface. The CPT-DFC1 has on-card switches for selection of the active SCI and CAN ports. The isoSPI interface can be selected for Master or Slave operation and the SPI MODE (0-3) is also configurable via on-card switches.

The CPT-DFC1 card mounts within the DF Series stack and uses the 26 way Communications Interface for communication with the DF Series Control Card.

DF Series Peripheral Cards are available with alternative communications interfaces. The currently available cards in this range are the CPT-DFC1, CPT-DFC4 and CPT-DFJ.

Technical Specifications


  • On-card facilities include:
    • Dual Isolated USB UART Interface
      • Dual SCI to Isolated single Mini-USB Interface (two serial ports within the one USB connection)
      • USB-A: On-Card DIP Switch Selectable between SCIA and SCIC
      • USB-B: On-Card DIP Switch Selectable between SCIB and SCID
      • Transmit and Received LEDs
      • Optional USB Shield connection to USB Ground.
      • 1000V Isolation between 5V-TTL level signals and USB Interface.
      • ESD Signal Protection
    • Isolated CAN Interface
      • ISO1050DUBR Isolated CAN Transceiver - ISO11898-2 Standard
      • Option of Mini-USB CAN connector or 0.1” Molex style
      • On-Card DIP Switch Selectable between CANA and CANB
      • ESD CAN Differential Signal Protection
    • Isolated SPI Interface (isoSPI configuration)
      • LTC6820IUD - SPI Encoder/Decoder
      • Bidirectional SPI Communications through a single twisted pair connection
      • Direction Selection: On-Card DIP Switch Selectable between Master/Slave
      • Mode Selection: On-Card DIP Switch Selectable Phase and Offset
      • Option of Mini-USB isoSPI connector or 0.1” Molex style
    • Real-Time Clock (I²C)
      • PCF85063ATL - Real-Time Clock with I²C-bus Interface
      • Real-Time Clock/Calendar
      • Alarm Function
      • Low Power Optimised
      • Countdown Timer
      • Minute and half minute interrupt
      • Battery Backup: 1F Supercapacitor
      • Internal Power-On Reset
    • 26-way DF Series Communications Interface
  • Dimensions:
    • 96mm x 46mm (3.78" x 1.81")