USB/CAN Interface (Version 2.0)
CPC-USB is a CAN interface for USB ports in a compact and robust metal housing. It is powered via USB and is equipped with a Cortex M3 microcontroller, and supports 11-Bit and 29-Bit CAN identifiers.
The CPC-USB is available as standard with galvanic isolation (optionally available without). Variants are optionally available with transceivers either for low speed operation for automotive environments, or for high voltage environments. Use of the MAX13502 transceiver allows up to +/-80V on the CAN bus lines.
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.
All values, unless otherwise specified, refer to a supply voltage of 5V and an environmental temperature of 20°C.