The CPC-USB/ARM7 is a USB CAN bus adapter, for use with Windows or Linux based systems in commercial and industrial environments. It utilizes a compact and robust metal housing, is powered via USB, and is equipped with a powerful Cortex M3 microcontroller.
The CPC-USB supports CAN protocols 2.0A and 2.0B, and is suitable for use with higher layer communication protocols such as CANopen, J1939, and DeviceNet. It is available with or without galvanic isolation, and there is the possibility of variants with transceivers for low speed operation for automotive environments, or for high voltage tolerance.
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As a member of the CPC family of PC to CAN interface products, the CPC-USB/ARM7 benefits from the CPC Software Interface Framework, which provides a consistent host software interface environment for Windows and Linux based applications that is independent of the PC hardware interface being used.
The CPC USB/ARM7 can also be used with SocketCAN in Linux based applications.
CPC-USB includes a CAN segment connected by a male plug of type D-Sub 9, the pin assignment is complying to CiA DS-102 standard. In addition, the interface includes a USB connector that also carries the supply for CPC-USB. The following table shows the assignment of the CAN connector:
|Pin||Name||Description (standard version)||Description (low speed version)|
|1||RTL||Not connected||Connected with Pin 2 by a 5k6 resistor and with dedicated Pin of TJA1054 CAN transceiver|
|2||CAN_L||CAN data line (dominant low)||CAN data line (dominant low)|
|7||CAN_H||CAN data line (dominant high)||CAN data line (dominant high)|
|8||RTH||Not Connected||Connected with Pin 7 by a 5k6 resistor and with
dedicated Pin of TJA1054 CAN transceiver
|4,5,6,9||-||Not Connected||Not Connected|
|Voltage on bus connections (standard version)||-30||+30||V|
|Voltage on bus connections (LS version)||-27||+30||V|
|Voltage on bus connections (HV version)||-80||+80||V|
Any (also temporary) stress in excess of the limiting values may cause permanent damage on CPC-USB and other connected devices. Exposure to limiting conditions for extended periods may affect the reliability and shorten the life cycle of the device.
|Current consumption (idle mode)||-||100||-||mA|
|Current consumption (operational mode)||-||-||250||mA|
All values, unless otherwise specified, refer to a supply voltage of 5V and an environmental temperature of 20°C.