This document discusses various ports and connectors used in computer systems. It describes common ports like USB, serial, parallel, PS/2, VGA, audio, RJ-45, RJ-11, firewire, DVI, HDMI and S-Video. It provides details on the purpose of each port, corresponding connector type and color coding of pins/wires. It also includes images to illustrate the different ports and connectors.

1. Practical - 02
System Unit Rare Panel
Ports and Connectors

2. System Unit Rare Panel

3. System Unit Rare Panel

4. Ports
• A computer port is a connection point or interface
between a computer and an external or internal
device. Internal ports may connect such devices as
hard drives and CD ROM or DVD drives; external ports
may connect modems, printers, mice and other
devices.
• A port serves as an interface between the computer
and other computers or peripheral devices. Physically,
a port is a specialized outlet on a piece of equipment to
which a plug or cable connects. Electronically, the
several conductors making up the outlet provide a
signal transfer between devices.

5. DIN5 – Port and Connector

6. DIN5 – Port and Connector
• It contains 5 holes/pins.
• DIN stands for Deutsches Institut für
Normung.
• It is commonly known as a PC/AT connection.
• It is utilized for serial data transfer between
computers and peripherals such as PC
keyboards, MIDI keyboards, and electronic
instruments.

7. DIN5 – Port and Connector

8. PS/2 – Port and Connector

9. PS/2 – Port and Connector

10. PS/2 – Port and Connector
• Introduced by IBM in 1987.
• Stands for Personal System/2.
• Used to connect Keyboard and Mouse.
• Also called Mini-Din-6.

11. PS/2 – Port and Connector
Purple
Keyboard
Green
Mouse

12. PS/2 – Port and Connector

13. Serial – Port and Connector

14. Serial – Port and Connector

15. Serial – Port and Connector
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Sends the data serially bit by bit.
Also called DB9.
Also called COM ports (Communication).
Bi-Directional (Transmit and Receive).
Mostly used to connect serial mouse, modem,
GPS Receivers and Bar code scanners.

16. Parallel – Port and Connector

17. Parallel – Port and Connector

18. Parallel – Port and Connector
Pins (2 – 9) = Data (0 bit – 7 bit)

19. Parallel – Port and Connector

20. Parallel – Port and Connector
• Sends 8 bits at a time.
• Also called DB25 or Centronics port.
• Also called Printer Port or LPT (Line Printer
Terminal).
• Mostly used to connect printers, scanners and
external drives.
• A newer type of parallel port, which supports the
same connectors as the Centronics interface, is
the EPP (Enhanced Parallel Port) or ECP (Extended
Capabilities Port).

21. VGA – Port and Connector

22. VGA – Port and Connector

23. VGA – Port and Connector
• VGA stands for Video Graphics Array.
• Also called DE15 or DB15.
• Also called RGB Connector.
• Used to connect Monitor, TV and Projector.

24. VGA – Port and Connector
BLUE
GREEN
RED

25. VGA – Port and Connector

26. USB – Port and Connector

27. USB – Port and Connector
• USB stands for Universal Serial Bus.
• Used to connect many different types of devices
to system unit.
• Is Plug and Play.
• Up to 127 devices can be connected.
• Used to connect Monitor, TV and Projector.

28. USB – Port and Connector
Versions of USB
• USB 1.0 (Full Speed)
• Released in the year 1996
• Maximum transfer speed of 12 Mbits/s
• USB 2.0 (High Speed)
• Released in the year 2000
• Maximum transfer speed of 480 Mbits/s
• USB 3.0 (Super Speed)
• Released in the year 2008
• Maximum transfer speed of 5 Gbits/s

29. USB – Port and Connector
Types of USB Connectors and ports
• USB A
• USB B
• USB Mini A
• USB Mini B
• USB Micro AB
• USB Micro B

30. USB – Port and Connector
USB A
USB B

31. USB – Port and Connector
USB B
USB A

32. USB – Port and Connector
USB A
USB Micro B

33. USB – Port and Connector
USB Micro B
USB Mini B
USB A

34. USB – Port and Connector
USB Mini B
USB Mini A

35. USB – Port and Connector
USB A
USB Micro AB

36. USB – Port and Connector

37. USB – Port and Connector

38. USB – Port and Connector

39. Firewire – Port and Connector

40. Firewire – Port and Connector

41. Firewire – Port and Connector
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Also called IEEE1394 Interface.
Developed by Apple in 1990s.
It provides serial communication.
Plug and play.
Up to 63 devices can be attached.
Provides maximum transfer rate of 400
Mbps/s.

42. RJ-45 – Port and Connector

43. RJ-45 – Port and Connector

44. RJ-45 – Port and Connector
• Stands for Rigid Jack 45 or Registered Jack 45.
• Used to connect computer over Local Area
Network (LAN)

45. RJ-11 – Port and Connector

46. RJ-11 – Port and Connector
• Stands for Rigid Jack 11 or Registered Jack 11.
• Also called Phone connector or Phone Jack.
• Used to connect computer over Internet using
dial up phone line.

47. RJ-11 – Port and Connector

48. Audio – Port and Connector

49. Audio – Port and Connector

50. Audio – Port and Connector
3.5mm Stereo Jack
Mono Jack

51. Audio – Port and Connector

52. S/PDIF – Port and Connector

53. S/PDIF – Port and Connector

54. S/PDIF – Port and Connector
• Stands for
Sony/Philips Digital Interconnect Format.
• Provides Audio interface.

55. DVI – Port and Connector

56. DVI – Port and Connector

57. DVI – Port and Connector

58. DVI – Port and Connector
• Stands for Digital Video Interface.
• Used to Connect Video Devices like Monitor
and Projector.

59. HDMI – Port and Connector

60. HDMI – Port and Connector

61. HDMI – Port and Connector

62. HDMI – Port and Connector
• Stands for High-Definition Multimedia
Interface.
• Audio and video interface.

63. S-Video – Port and Connector

64. S-Video – Port and Connector

65. S-Video – Port and Connector
• Stands for Separate Video.
• Contains 4 pins.
• Provides Video interface.

66. Label the Ports

67. Label the Ports

68. Label the Ports

69. PS/2 to USB Conversion
USB Pin
Name
USB Pin
Number
USB Wire
Color
PS/2 Pin
Number
PS/2 Pin
Name
PS/2 Wire
Color
VDC +5V
1
Red
4
VDC +5V
Red
Data -
2
White
1
Data
White
Data +
3
Green
5
Clock
Brown
Ground
4
Black
3
Ground
Black