Sys Tec Electronic USB-CANmodul, System Manual

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Introduction
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SYS TEC electronic GmbH 2001 L-487e_6
5
1 Introduction
Unveiled in 1995, the Universal Serial Bus (USB) connectivity
standard provides a simple and convenient way to connect various
peripheral devices to a host-PC. It will replace a wide variety of serial
and parallel connections. The USB standard allows up to 127 devices
to be connected to the PC without using multiple connector types,
without interrupt conflicts (IRQs), hardware address adjustments
(jumpers) or channel changes (DMA). USB provides powerful true
hot plug-and-play capability; i.e., dynamic attach and recognition for
new devices. It allows the user to work with those devices
immediately without restarting the operating system.
The USB-CANmodul takes advantage of this new communication
standard and provides an easy to use portal from a host-PC to a CAN
network. Connecting the USB-CANmodul to the host-PC is simple.
The included USB cable supports the two types of USB connectors,
type A and type B. The type A plug connects to the host computer or
an upstream hub. Type B plug connects downstream to the USB-
CANmodul. The USB interface enables data transfer with a rate of up
to 12 MBit/s. With a uniform connector for all device types, the
system is absolutely user friendly.
Once the USB-CANmodul is connected to the host-PC, the operating
system reads the configuration data and automatically loads the
device driver. All CAN messages are transferred transparently
through the USB Bus. CAN Baud Rates of up to 1 MBit/s are
supported. The transmitted and received CAN messages are buffered
by the USB-CANmodul. The device supports CAN messages
according to CAN 2.0A and 2.0B specifications (11- and 29-Bit
identifiers). Connection to the CAN bus meets the CiA Standard DS
102 (DB-9) and features optical isolation of the CAN signals.