![background image](http://html.mh-extra.com/html/national-instruments/enet-232-series/enet-232-series_manual_708976029.webp)
ENET Kits
The ENET serial hardware gives you a variety of solutions for serial
communication. The RS-232 interfaces work with the RS-232 protocols.
The RS-485 interfaces work 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 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 boards 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 serial ENET interfaces contain FIFO (First-In-First-Out) buffers to
reduce susceptibility to interrupt latency for faster transmission rates.
Also, serial ENET interfaces contain additional onboard buffers to reduce
susceptibility to Ethernet network traffic.
With a serial ENET interface, you gain all the features inherent in a
networked device: fewer cabling distance restrictions, device sharing,
and communication with devices throughout the Internet. In a serial
application, you usually are restricted to the distance limitations of the
RS-232, RS-422, or RS-485 specifications. Because the serial ENET
interface uses Ethernet, you can add an unlimited distance to your
application by exploiting the distances available using a networked
device. Device sharing with a serial ENET interface happens on a per-
port basis. That is, although the serial ENET interface supports network
connections from multiple hosts, each serial port is associated with only
one host at a time.
Dynamic Host Configuration Protocol (DHCP) is available on many
networks to configure network parameters automatically. DHCP simplifies
the installation and configuration process for the serial ENET. For more
information about DHCP, refer to
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 ...