RS-232

(redirected from Rs232)
Also found in: Acronyms.

RS-232

(communications)
A standard developed by the Electronic Industries Association that governs the interface between data processing and data communications equipment, and is widely used to connect microcomputers to peripheral devices.

RS-232

RS-232

(Recommended Standard-232) A TIA/EIA standard for serial transmission. Although employed for numerous other purposes, the RS-232 serial port was widely used on earlier personal computers prior to USB (see serial port). The RS-232 cable limitation of 50 feet can be extended to several hundred feet with high-quality cable.

Although RS-232 defines the signals for 25 lines, many applications use less than a dozen, which is why both DB-25 and DB-9 connectors are used. RS-232 transmits positive voltage for a 0 and a negative voltage for a 1. In 1984, RS-232 was officially renamed TIA/EIA-232-E. See RS-232/485.

Pin Settings for Plug(Reverse order for socket.)
  ______________________________________
  1  2  3  4  5  6  7  8  9  10 11 12 13
   14 15 16 17 18 19 20 21 22 23 24 25

           _________________
             1  2  3  4  5
               6  7  8  9


 25 pin                        9 pin

  1 - PG   Protective ground
  2 - TD   Transmitted data     3
  3 - RD   Received data        2
  4 - RTS  Request to send      7
  5 - CTS  Clear to send        8
  6 - DSR  Data set ready       6
  7 - SG   Signal ground        5
  8 - CD   Carrier detect       1
  9 - + voltage (testing)
 10 - - voltage (testing)
 11 - 
 12 - SCD  Secondary CD
 13 - SCS  Secondary CTS
 14 - STD  Secondary TD
 15 - TC   Transmit clock
 16 - SRD  Secondary RD
 17 - RC   Receiver clock
 18 - 
 19 - SRS  Secondary RTS            9 pin
 20 - DTR  Data terminal ready      4
 21 - SQD  Signal quality detector
 22 - RI   Ring indicator           9
 23 - DRS  Data rate select
 24 - XTC  External clock
 25 - 
References in periodicals archive ?
They also are providing the same sort of "virtual COM port" drivers with the instrument so that you can continue to use legacy RS232 communication software to communicate with the instrument even though the cable connection from the instrument is either a USB cable or a network cable.
In addition, when used in conjunction with static IP addressed SIMs, also available from Amplicon, the RS232 and Ethernet devices attached can be connected to directly from any Internet-facing PC in the world, the company claims.
The RS232 CDMA MultiModem (models MTCBA-C-Nx-IP) with IP capability, comes in a rugged industrial chassis design with an RS232 DE-15 voice/data interface, permanent screw-type power connector and SMA antenna connector.
However, the ability of the AdderLink AV200 Series to communicate with up to 64 screens individually or collectively from a single RS232 interface brings a new level of digital signage display management to this market.
Even with a RS232 device, such as a digital display, balance scale, or bar code scanner, Advanced Systems and Designs can design a FlashCable[R] so the customer can automatically record data and eliminate manual data entry errors.
Microprocessor 8051 with smps for above 101 keys pcat/ps2 keyboard , rs232 serial link / cable & pc up/down loading software & crossassembler on cd , rs232 port to usb connector
The SP3282EB offers robust ESD protection on both the RS232 pins and CMOS/TTL-logic pins.
The new system makes optional all ancillary functions that were standard on the Procan 2, such as floppy disk or RS232 port.
Rather than use a RS232 cable, a programmer can use a Device Server attached to the serial port.
The GT1020 models offer increased mounting options including vertical or horizontally installations, and standard equipment such as a single embedded high-speed serial port, and an additional RS232 or RS422 serial port.
com)-- Electro Standards Laboratories, Cranston, RI, announces the Model 4139 HP fiber to RS232 converter.
Communications interfaces for Ethernet, Profibus Master and RS232 have been integrated into the base modules of the IndraControl L.