Copley Controls: Single Channel CAN PCI Express Interface Card CAN-PCIE-01

Continuous Current: 0A

A highly cost-effective, dual-channel CAN card makes the connection between Copley Controls’ distributed control software and CANopen servo and stepper drives. The two independent CAN ports are galvanically isolated to provide greater noise immunity in industrial environments. An on-board microcontroller off-loads tasks from the host computer enabling faster system performance. PCI compliant, it is compatible with both 3.3VDC and 5VDC computers.

DESCRIPTION

The PCIe-CAN is a single channel CAN interface card for the PCI Express bus. The CAN interface is galvanically isolated to protect the PC hardware and provide better noise immunity in industrial environments. The card incorporates a high performance 32-bit RISC processor. This processor handles all low level details of interfacing with the CAN hardware, offloading this task from the host processor. A 4Kbyte dual-port RAM is used to buffer messages to and from the host processor. This memory space provides room for 10 transmit and 164 receive CAN messages. The on-board processor synchronizes it’s local clock to the host processor clock. All received messages are time stamped using this clock with 1 microsecond accuracy. Transmitted messages may also be time stamped with their actual transmit time. This allows for simple implementation of the CANopen network synchronization protocol (DS301 object 1013h). Device driver support is provided for Windows and Linux. CANview bus monitoring software is available for both Windows and Linux hosts.

ON-BOARD PROCESSOR

Many inexpensive CAN interface cards are little more then a PCI Express interface chip and one or more CAN controllers such as the SJA1000 from Philips. Cards such as this provide very little buffering on board and require the host processor to retrieve incoming messages very quickly or data will be lost. Desktop operating systems such as Windows or Linux do not guarantee low latency response to external events, so at times of high bus activity it is common for inexpensive CAN interface cards to lose messages. The on-board processor provided on the CAN-PCIe-01 interface card solves this problem by handling each CAN message as it’s received and storing them in a large queue. Extended periods of 100% bus utilization can be sustained at maximum bit rate with no loss of data.

DIMENSIONS (mm)

114 x 81