PCIe-CAN-01 FEATURES DESCRIPTION Value of on

PCIe-CAN-01 FEATURES DESCRIPTION Value of on
PCIe-CAN-01
FEATURES
•
Single galvanically isolated CAN channel
•
High speed ISO 11898 compliant interface supports up
to 1 Megabit/sec bit rates.
•
Supports CAN 2.0A and 2.0B message format
•
PCI Express x1 low profile interface
•
On board 32-bit processor
DESCRIPTION
The PCIe-CAN-01 is a single channel CAN interface card for the PCI Express bus. It's 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.
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 Microsoft Windows, Linux and QNX. CANview bus monitoring
software is available for both Windows and Linux hosts.
Value of 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 Microsoft 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 PCIe-CAN 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.
CAN Bus Connector – Dsub 9, male
PIN
Signal
1
No Connection
2
CAN Low
3
CAN Ground
4
No Connection
5
No Connection
6
CAN Ground
7
CAN High
8
No Connection
9
No Connection
Specifications
CAN Channels
1 galvanically isolated.
CAN bit rate
20 kbps to 1000 kbps
Maximum message rate
20,800/sec
Message buffering
164 receive messages and 10 transmit messages
On-board termination
120 Ohm, jumper selectable
Timestamp resolution
1 microsecond
OS supported
Windows, Linux, QNX
PCI interface
PCI Express x1
Input voltage
3.3V from PCIe connector
Input current
180mA typical
Operating temperature
-10° to 70° C
Dimensions
3.8” x 1.9” (96mm x 48mm)
Agency approvals
CE, FCC, RoHS
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