EIA-449 Standard By- Vineeta Shakya

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EIA-449 Standard By- Vineeta Shakya CORPORATE INSTITUTE OF SCIENCE & TECHNOLOGY, BHOPAL Department of Electronics and Communication Engg. EIA-449 Standard By- Vineeta Shakya

EIA 449 Standard Introduced in 1970 by EIA to overcome limitation of RS-232 Increase Bandwidth Increase Distance

Mechanical Specification It has two connector 9 Pin connector 37 Pin Connector

9 Pin Connector

Function of each Pin

37 Pin Connector

Pin function

Category I Pins Category - I Pins has those pins whose functions are compatible with those of EIA-232. For each Category - I Pin EIA -449 defines two pins one in the first column and one in second colemn

Category-II Pins Category – II Pins are those that have no equivalent in EIA – 232 or have been redefined.

Functions Of Category- II Pins

Electrical Specifications EIA-449 uses two standard to defines its electrical specifications RS- 423 (for Unbalanced Circuit) RS- 422 (for Balanced Circuit)

RS-423 Standard

RS-423 Standard

Wave forms for RS-422

BNC Connector

BNC Connector

RJ-11 connector

Pin function

RJ-45 Connector