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Topic: RS232


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  The educational encyclopedia, rs232-485   (Site not responding. Last check: 2007-10-03)
RS232 C RS-232C is the most recent version of the EIA (Electronics Industry Association) standard for low speed serial data communication.
RS232, RS422 and RS485 RS 232, RS 422 and RS 485, transfer protocols
RS232 - 485 balanced voltage interface RS422 interfaces are typically used when the data rate or distance criteria cannot be met with RS-232
users.telenet.be /educypedia/computer/rs232485.htm   (440 words)

  
 RS232 to RS485 Addressable Converter
RS485 to RS232 addressable converter with DB25 connector and terminal strip for RS485 connections.
These units provide both Transmit and receive buffering of RS232 data and a full 16 bit CRC checksum for the RS485 network packet error detection.
RS232 and RS485 baud rates are individually selected and can support differing baud rates.
www.rs-485.com /converteritemw.asp?record=28   (304 words)

  
 RS485, RS232, RS422, RS423, Quick Reference Guide
RS232 (single-ended) was introduced in 1962, and despite rumors for its early demise, has remained widely used through the industry.
The RS232 signals are represented by voltage levels with respect to a system common (power / logic ground).
RS232 has numerous handshaking lines (primarily used with modems), and also specifies a communications protocol.
www.rs485.com /rs485spec.html   (1037 words)

  
 RS232 Cables
RS232 serial or parallel extension cable, wired straight through (1 to 1), 25 Conductor DB25 Male to Male, 10'.
RS232 serial or parallel extension cable, wired straight through (1 to 1), 25 Conductor DB25 Male to Male, 100'.
RS232 serial or parallel extension cable, wired straight through (1 to 1), 25 Conductor DB25 Male to Male, 15'.
www.ramelectronics.net /html/rs232_cables.html   (555 words)

  
 serial interface, rs232, DTE, DCE cables, rs232 pinouts, DB25 Null-modem cable, DB25 to DB9 DTE - DCE cable, etc.
In this document the term RS232 will be used when refered to this serial interface.
The description of RS232 is an EIA/TIA norm and is identical to CCITT V.24/V.28, X.20bis/X.21bis and ISO IS2110.
The zero state is not defined in RS232 and is considered a fault condition (this happens when a device is turned off).
www.connectworld.net /rs232.html   (608 words)

  
 RS232 serial cable pinout information
Although this serial interface is differential (the receive and transmit have their own floating ground level which is not the case with regular RS232) it is possible to connect RS232 compatible devices with this interface because the voltage levels of the bit streams are in the same range.
Where the definition of RS232 focussed on the connection of DTE, data terminal equipment (computers, printers, etc.) with DCE, data communication equipment (modems), MMJ was primarily defined for the connection of two DTE's directly.
RS232 null modem cables with handshaking can be defined in numerous ways, with loopback handshaking to each PC, or complete handshaking between the two systems.
www.lammertbies.nl /comm/cable/RS-232.html   (787 words)

  
 rs232power
The really good thing about RS232 [1] is that it was devised long ago when a signal had to be pretty hefty to reliably detect it.
But we have never found any RS232 implementations that used supply rails of greater than 12 volt and are comfortable using circuitry that is rated for 12 volt maximum.
The RS232 outputs from which you draw power may be routed to RS232 inputs on another port, so that the outputs have a double load.
www.analogservices.com /rs232.htm   (2705 words)

  
 RS-232 Bus Description and EIA232 Pinout
RS232 is an Unbalanced (Single Ended), unidirectional (point-to-point) interface - signal is referenced to ground.
RS232 is rated to operate up to 20kbps.
The start bit is active low [RS232 drivers invert the signaling, so it's active high as seen on the RS232 cable; between +3v and +15v].
www.interfacebus.com /Design_Connector_RS232.html   (965 words)

  
 The Micro Stop - RS232 and microcontroller schematics and C code, a lot is free!
RS232 controlled and RS232 powered DVM2005 voltmeter kit with PC voltage display.
The circuit shown can be used directly from a microcontroller or add the RS232 interface circuit to control the LCD from a PC.
Build a 2X16 RS232 LCD that can be controlled from a PC at RS232 signal levels or from microcontroller levels.
www.viddata.com /micro_stop.htm   (1105 words)

  
 RS232 to TTL Converter
This converter provides two way RS232 serial communications signal conversion between the TTL (Transistor Transistor Logic) output (from an OOPic or other PIC) to and from a personal computer RS232 serial COM port.  This converter can be used on any Micro controller/PIC which has TTL serial communications that needs to be converted to RS232.
RS232 to TTL signal converter serial cable (Tx, Rx, +5, GND).  It is a serial cable with a single 4-pin header for mounting on the OOPic prototyping area or for your own RS232 PIC project. For the mating 4-Pin Friction Lock Header follow this link. This type does not have handshaking.
Type 2: RS232 to TTL signal converter serial cable (Tx, Rx, +5, GND).  It is a serial cable with two 2-pin connectors for use with the existing 40 OOPic I/O header or other PIC pinouts.  This type does not have handshaking.
www.superdroidrobots.com /rs232.htm   (342 words)

  
 Microchip PIC microcontroller projects
Complete RS232 communication routine for PIC16F84, which allows to display sent characters from the PC on a dot matrix LCD Display and send an acknowledge back to the PC.
ASCII values entered on one terminal window are transmitted by RS232 to the controller, displayed on the LCD, and further transmitted to the other terminal window.
The scan patterns are fetched by the controller and afterwards sent to the RS232 target device, in this case the PC and an Excel 97 worksheet programmed with Visual Basic to visualize the scan patterns.
www.electronic-engineering.ch /microchip/projects/projects.html   (1240 words)

  
 ADR Serial Data Acquisition Interfaces ( RS232, RS485, USB to Digital, Analog and Relay I/O )
RS232 and RS485 ports, 8 single-ended or 4 differential analog inputs, 0 -5 VDC or +/-5VDC.
RS232 and RS485 ports, 8 single-ended analog inputs, 0 -5 VDC, 0-10VDC, +/-5VDC, +/-10VDC.
RS232 and RS485 ports, 8 relay contact outputs (0.5A@125VAC 1A@30VDC), 4, TTL or contact input lines, and one event counter which accepts contact or TTL inputs.
www.ontrak.net /products.htm   (660 words)

  
 Max233 Adapter
A tiny RS232 adapter using a Maxim’s Max233.
For example one port can be used to collect data from a device such as a GPS and the other port can be connected to a PC terminal to monitor or control the device.
RS232 adapter with an on-board regulator which can, if possible, use the DTE ‘s (such as a PC) RTS/DTR voltage to power the Max232 IC.
www.compsys1.com /workbench/On_top_of_the_Bench/Max233_Adapter/max233_adapter.html   (865 words)

  
 RS232: RS232 Connector wiring
When Handshaking is required, generally RTS of one device connects to CTS of the other, and vice versa, and also DSR of one device connects to DTR of the other device, and vice versa.
If you have problem with RS232 cabling, your best "emergency" tool may be a breakout box (sometimes called an LED box).
By this, I mean that one line in the cable has an output driving it from both ends - and this is not correct for RS232 - so that means that the cable wiring is not correct for the devices.
www.airborn.com.au /rs232.html   (1092 words)

  
 Tech Info - RS232 Cables and Wiring
RS232 defines both the physical and electrical characteristics of the interface.
RS232 is practically identical to ITU V.24 (signal description and names) and V.28 (electrical).
The power level on RS232 pins is defined by TIA in terms of short circuit protection at 100mA.
www.zytrax.com /tech/layer_1/cables/tech_rs232.htm   (1620 words)

  
 Using RS232 devices with USB
Another method of connecting RS232 devices to a USB based host is to use a USB to RS232 converter.
To connect an ADR2200 to a USB based computer, all that is required is a USB to RS232 converter, a standard A-B USB cable, an RS232 cable and the ADR2200 target device.
Since the USB to RS232 converter is configured as an actual COM port, the application software can access the ADR2200 as if it were connected directly to the host computer through the specified COM port.
www.ontrak.net /usb.htm   (674 words)

  
 The Moth: Serial (RS232) communications in .NET
I guess MS thought that rs232 was becoming obsolete - or I don't know what.
The fact is that, especially on CE devices, rs232 is part of everyday life.
The first rs232 code to appear for.net is here.
www.danielmoth.com /Blog/2004/09/serial-rs232-communications-in-net.html   (359 words)

  
 AT Keyboard Interface V1.04 for Microchip PIC 16F84 Microcontroller
Therefore, the RS232 terminal is placed at the entrance to the supervised area.
There exists no possibility to implement also RS232 reception using my modules m_rsxxx.asm, because they require PORTB,0 as well and are laid out as non-preemptive data acquisition routines (see also 'Limitations').
RS232 Debug Interface have been used to debug the interface during implementation time.
www.electronic-engineering.ch /microchip/projects/keyboard/v1xx/keyboard_v1xx.html   (2878 words)

  
 RS232 industry links by RS232Pro
Dallas Semiconductor has a document on PC RS232 fundamentals that is very comprehensive.
Embedded RS232 developers may find a document with simplified information on using the MCS-51tm (80C51) microcontroller's built-in UART useful.
The newest of the "Rx" line is the 89C51Rx2 controllers that use half the processing time as their predecessors.
www.rs232pro.com /vidlinks.htm   (933 words)

  
 RS232 Specifications and standard
Communication as defined in the RS232 standard is an asynchronous serial communication method.
The RS232 standard describes a communication method where information is sent bit by bit on a physical channel.
More information about the voltage levels of RS232 and other serial interfaces can be found in the interface comparison table.
www.lammertbies.nl /comm/info/RS-232_specs.html   (1673 words)

  
 RS232   (Site not responding. Last check: 2007-10-03)
The RS232 (Recommended Standard 232) specification [1] is the universally agreed protocol for serial interfaces.
RS232 serial interfaces limit cable length to 16 meters.
To overcome the distance limitations of RS232, BandB Electronics offer a range of protocol converters to which convert the RS232 signals to RS422 and RS485 standards [3].
www.bb-europe.com /electronics/rs232_av.html   (227 words)

  
 The RS232 page
RS232 describes the standard for serial data communication between PCs and peripheral devices, such as modems, mice etc. and between PCs.
Nowadays RS232 is replaced by USB more and more, but it is still an important standard, especially in the world of mobile devices, such as palmtop PCs and mobile phones.
This still meets the RS232 specifications, but it may lead to problems if you connect power-hungry devices which are powered by the port itself.
www.daniel-hertrich.de /rs232   (3570 words)

  
 PTronix - Serial Monitor, RS232 Analyzer, PC Interfacing
Use to log, view, analyse or automate RS232 communication or simply use as an ASCII Terminal for basic serial port communication and RS232 device configuration.
There are currently two versions of this RS232 / serial monitor (Standard and Gold Edition) with a slightly different feature set so that you only pay for what you need.
These high quality, fully documented modules have an unparalleled feature set and are affordably priced for use by technicians, engineers or students in schools, colleges and universities for their data acquisition and control system requirements.
www.ptronix.com /products   (327 words)

  
 Docklight RS232 Terminal - RS232 Monitor - Free Download
This makes it possible to simulate the behavior of a serial communication device, which is particularly useful for generating test conditions that are hard to reproduce with the original device (e.g.
However, it is also possible to use Docklight for other communication standards such as RS485 and RS422, which have a different electrical design to RS232 but follow the RS232 communication mechanism.
It would be useful for recording data from total station, GPS and other rs232 devices connected to PDA.
windows-development-tools-debugging.funhosts.com /docklight-rs232-terminal-rs232-monitor.html   (663 words)

  
 RS232 Monitoring Software and RS232 Terminal Software Tools
RS232 Hex Com Tool is a serial software terminal program that can be used to communicate with just about any rs232 peripheral.
RS232 Hex Com Tool is easy to use and rs232 setup data can be saved for multiple peripherals and later retrieved for easy setup of each individual device.
RS232 controlled DVM2005 digital volt meter kit with PC interface and in-circuit programming.
www.viddata.com   (438 words)

  
 RS232
Quick and easy explanation of the RS232 cables used with most digital receivers.
The ends are RS232 9 pin male to male.
RS232 cables are available from your DMS International dealer.
www.dmsiusa.com /rs232.htm   (174 words)

  
 Software Download: Rs232
Can be used (running on different ports) together with another web server and script engine, to have a most wanted feature missing or hard to implement feature: accessing remote serial ports.
The RS232 Cardreader is an encased programmer which can be used for EEPROM, AVR and PIC programming.
Automate operations on schedule, on a keypress or via various events (windows event log changes, file/folder modifications, signals from an RS232 port, etc.) Here are just a few examples of what xStarter can do for you: The program can start/stop processes and services, send keys to applications or play pre-recorded macros imitating a real user.
www.sharewareconnection.com /titles/rs232.htm   (3461 words)

  
 RS232 software, RS 232 to TCP/IP software from TAL Technologies   (Site not responding. Last check: 2007-10-03)
BC-Wedge for bar code scanners, and CE-Wedge for RS232 to Windows CE are also available.
RS232 to TCP/IP TCP-Com is a software based RS232 to TCP/IP converter.
For example, you can use TCP-Com to turn a PC into a “Serial Device Server” so that you can connect any RS232 serial device directly to a TCP/IP network and communicate with that device from any other workstation in the same network or across the Internet.
www.rs232software.com   (195 words)

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