RS-232

(redirected from RS 232)

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 ?
Contract awarded for 4698ns01-rs 232 to e1(g:703) interface convertor with converts rs 232 asynchronous data into 2.048 mbps e1 data or nx 64 kbps e1 data, it supports both frame and un frame operations over e1 channel.
A wide range of onboard I/O is available to the user: the board supports four 10/100/1000Mbps Ethernet interfaces (two front and two rear) and the front panel also supports a USB 2.0, RS 232, analog graphics, keyboard and mouse interfaces.
With the PC interface RS 232, the USB slave port and the SmartMedia card, data are said to be easily transferred.
The boards are designed with a USB and RS 232 interface so that users are independent from their OS.
In addition, printer and RS 232 ports connect the unit to printers and computers, allowing the instantaneous printout of results.
An RS 232 interface port is provided to upload measurement data to SPC and other database software.
Dect-3 Or Similar Of Make: Rishabh/Kusam-Meco/Fluke Tech, Spec: Resistance Measurment Range:0.01 Ohm To 1200 Ohm Current Measurment Range: 0 To 20 A, Complete Interfacing: Rs 232 Protection Level: Double Insulation Alert: Sound And Light Annunciater With Following Accessories: Carrying Case, Standard Look Resistance Of 5.1 Ohm, Manual, Rs 232 Cable Pc Software Cd,Calibration Certificate.
Tenders are invited for Pyrometer Portable Infrared Temperature Range 200 Digree C To 1850 Digree C Interface : Rs 232 Computer Interface Emissivity : Adjustable From 0.1 To 1.0 With 9V Alkaline Battery,Hard Carrying Case Rs 232 Connection Software Cd.
Tenders are invited for supplying of security guards minimum wages rs 232 per head per day 42 heads approx and supplying of armed guards minimum wages rs 232 per head per day 05 heads approx
Dte Side- Asynchronous Rs 232, D-Type Connector Supportable To Baud Rate Between 9600 And 57600 Bits/Sec, Dsc Side-4 Wire Ei Communication G.703 Line Speed 2 Mbps, Line Impedance 120 Ohm/75 Ohm, Connector Rj 45 Or Bnc, Power Supply Rating 16V To 30 Vdc Or 230V Ac
Tenders are invited for Rs 232 To Usb Converter Cable