 |
|
home |
contacts | site policy
|
| |
|
Interface pinout and electrical information.
|
|
| |
MENU |
|
| |
|
| |
| These are short descriptions of the interfaces available from the menu on
the left at the bottom of this page . The information is as accurate as I can
make it , if you spot mistakes let me know. |
| |
|
|
Digital Interface Voltage Comparisons
|
| |
|
LOGIC
STATE |
CCITT
RECOMMENDATION |
| Control |
Data |
V.28 |
V.35 |
V.11 |
X.21 |
RS 449 |
| Minimum Input Voltages |
OFF |
1 |
-3v |
< -70 mV |
<-0.3v |
<-0.3v |
<-0.3v |
| ON |
0 |
+3v |
>+70mV |
>+0.3v |
>+0.3v |
>+0.3v |
| Typical Output Voltages |
OFF |
1 |
-5 .. -12v |
-0.55v |
-3v |
-3v |
-3v |
| ON |
0 |
+5 .. +12v |
+0.55v |
+3v |
+3v |
+3v |
| Recommended
connector type |
|
25 way D-Type |
34 way square |
|
15 way D-Type |
37 way D-Type |
|
| |
| |
| These are short descriptions of the interfaces available from the menu on
the left. The information is as taken from many different sources too numerous
to mention. If what you require is not here try
technick ,this site is
excellent for hardware and interface information. |
| |
|
| |
|
| X.21 / V.11 |
| X.21 defines the physical characteristics for a general interface between
DTE and DCE using synchronous transmission on public data networks . This
interface is extensively used for 64Kb circuits and 56Kb/s (USA and
Japan). |
| |
| RS 449 |
| RS449 redefines RS232 and was intended to replace it . This recommendation
includes several CCITT V.24 circuits which were not included in RS-232 and they
are 140,141,142,126,116 and 117. It also specifies that for data rates higher
than 20Kb/s ten V.24 circuits should have balanced circuits and use V.11 /
RS422 voltage levels making them compatable with CCITT X.21 . |
| |
| V.35 |
| V.35 describes the modulation methods for 48Kb/s synchronous full duplex
data communication circuits. It also redefines the V.24 circuits 103,104,114
and 115 to make them balanced circuits. |
| |
| RJ45 |
| RJ45 Connector as used for UTP and ISDN S-Bus / PRA 2mb presentation
connections. |
| |
| IEEE 488 |
| This interface is for Programmable Instrumentation using a Data Bus between
instruments to transfer data to and from the various instruments connected.
|
| |
| RS 232 |
| Most computers,terminals,printers and modems have a familiar connector with
either 9 pin D-Type or 25 pin D-Type , if so this connector probably conforms
to the CCITT V.24 / RS232 standard. |
| |
| Laplink |
| 25 Pin male to 25 Pin male connector used between two PC's running LAPLINK
software. |
| |
| Centronics |
| The Centronics Parallel interface has become accepted as the standard
connector used between a PC and a Printer.The interface carries an 8 bit byte
in parallel which is clocked in to the printer using the STROBE pulse signal
supplied by the Computer (PC). |
| |
| PC Com Port |
| Programmers only , indepth information about the PC serial port. This file
is 126Kb and has not yet been tidied up for web publication. |
| |
| U.S.B. |
| Just about any computer that you buy for your home or office today comes
with one or more Universal Serial Bus connectors on the back. These USB
connectors let you attach everything from mice to printers to your computer
quickly and easily. |
| |
| Firewire |
| FireWire uses 64-bit fixed addressing, based on the IEEE 1212
standard.Developed by Apple Computers and often found on Video Cameras. |
| |
|
|
| |
|
|
|
|
If you find this useful and have information to add email
Martin Ryan. All contributions ,
queries and constructive criticisms are welcome. |
|
