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ExpressCard Kits
The ExpressCard serial hardware gives you a variety of solutions for
serial communication. The ExpressCard-8420 interface works with the
RS-232 protocol, and the ExpressCard-8421 interface works with the RS-
422 and RS-485 protocols. You can use the RS-232 ports for serial
communication up to distances of 50 ft. You can connect the RS-485
ports to up to 31 devices using serial cable lengths up to 4,000 ft.
The ExpressCard-8420 and ExpressCard-8421 are available with two
ports. All ExpressCard cards include cables for each port that terminates
in a standard DB-9 connector. Throughout this help file,
ExpressCard
serial interfaces
refers to all versions of the interfaces.
The RS-232 ports are DTE. In the RS-232 specification, Data Terminal
Equipment (DTE) and Data Communications Equipment (DCE) refer to
the types of equipment on either end of a serial connection. In general,
DTE and DCE refer to computer equipment and modems, respectively.
For more information about cabling a RS-232 port to other devices, refer
to
.
The RS-485 ports support four hardware transceiver control modes for
reliable communication with two and four-wire devices. For more
information about transceiver control modes, refer to
All ExpressCard serial hardware uses standard 16550-compatible UARTs
(Universal Asynchronous Receiver/Transmitters) for complete
compatibility with standard PC COM ports. The serial hardware contains
FIFO (First-In-First-Out) buffers to reduce susceptibility to interrupt
latency for faster transmission rates. Full Plug and Play compatibility
allows switchless configuration and installation. For more information
about the serial hardware specifications and operating conditions, refer to
the
NI Serial Hardware Guide
.
ExpressCard Board Names and Descriptions
ExpressCard
Board Name
Description
ExpressCard-8420 RS-232 two port
ExpressCard-8421 RS-485 two port
Содержание ENET-232 Series
Страница 1: ......
Страница 5: ...Using Help Conventions Navigating Help Searching Help Printing Help File Topics ...
Страница 17: ...How to Use this Help File To use this help file refer to the following flow chart and the appropriate topics ...
Страница 21: ...Serial Hardware Overview PCI Kits PXI Kits USB Kits ENET Kits ExpressCard Kits PCMCIA Kits ...
Страница 24: ...PCI 485I RS 485 two port isolated RS 485 four port isolated ...
Страница 27: ...PXI 8423 RS 485 two port isolated RS 485 four port isolated ...
Страница 63: ...Save Pending Changes To save your changes to this item click Save ...
Страница 65: ...Restore Defaults To reset the fields to their default values at any time click the Defaults button ...
Страница 98: ...0 LPVOID l_SerialInterface sizeof l_SerialInterface LPDWORD l_ByteCount NULL ...
Страница 127: ...2 PORT LEDs USB Serial Hardware LEDs ...
Страница 139: ...Connecting the Cables to a Four Port PXI Serial Board ...
Страница 141: ...67 58 50 41 33 24 16 7 TXD 9 RI 9 ...
Страница 167: ......
Страница 169: ......
Страница 171: ......
Страница 181: ...How many serial ports can I have on my machine You can have up to 256 serial ports ...
Страница 189: ...nslookup hostname If you still cannot communicate with your device contact National Instruments ...
Страница 201: ...Glossary Prefixes Symbols A B C D E F G H I K L M P R S T U V ...
Страница 203: ...Symbols degrees ohms percent ...
Страница 204: ...A A amperes ANSI American National Standards Institute ...
Страница 205: ...B b bits B bytes baud bits per second bps bits per second ...
Страница 206: ...C C Celsius COM Computer Output Microform used in reference to a communication port CTS clear to send ...
Страница 208: ...E EIA Electronic Industries Association EMI electromagnetic interference ENET Ethernet ...
Страница 209: ...F FCC Federal Communications Commission FIFO First In First Out ft feet ...
Страница 210: ...G G ground ...
Страница 211: ...H HSI handshake input HSO handshake output Hz Hertz ...
Страница 213: ...K Kbaud kilobits per second ...
Страница 214: ...L LED light emitting diode ...
Страница 215: ...M m meters MB megabyte ...
Страница 216: ...P PC personal computer PCI Peripheral Components Interconnect ...
Страница 218: ...S s seconds SCSI Small Computer Systems Interface ...
Страница 220: ...U UART Universal Asynchronous Receiver Transmitter ...
Страница 221: ...V V volts VDC volts direct current VXI VME eXtensions for Instrumentation ...
Страница 222: ...Important Information Warranty Copyright Trademarks Patents Warning Regarding Use of NI Products Compliance ...