logging in or signing up rs 449 serial interfaces Misty91 Download Post to : URL : Related Presentations : Let's Connect Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Copy embed code: Embed: Flash iPad Dynamic Copy Does not support media & animations Automatically changes to Flash or non-Flash embed WordPress Embed Customize Embed URL: Copy Thumbnail: Copy The presentation is successfully added In Your Favorites. Views: 643 Category: Science & Tech.. License: All Rights Reserved Like it (0) Dislike it (0) Added: August 25, 2010 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... By: pp12479 (32 month(s) ago) very good Saving..... Post Reply Close Saving..... Edit Comment Close By: ahmed.subzero (38 month(s) ago) it is very useful ppt and thanks for that Saving..... Post Reply Close Saving..... Edit Comment Close Premium member Presentation Transcript RS 449 Serial Interface Standards : RS 449 Serial Interface Standards Snapshot : Serial Interfaces Need for a standard, its requirements RS 449 Serial Interfacing Pin designations Primary goals Category 1 and Category 2 circuits Comparison with RS 232 Snapshot Serial Interfaces : To ensure an orderly flow of data between a DTE and a DCE, a standard serial interface is used to connect them. Serial Interfaces Requirements of a standard : A serial interface standard should provide the following: A specific range of voltages to transmit and receive signals Limitations for electrical parameters of the transmission line to be taken into account Standard cable and connectors Functional description of each signal on the interface Requirements of a standard RS 449 Serial Interface Standards : The data rates had exceeded the capabilities of RS 232 interfaces Consequently, in 1977 EIA introduced RS 449 with the intention of replacement of RS 232 However, it is a generic connector specification. It is not an actual interface When combined with RS-422A or RS-432A,these cables could replace RS 232 cables RS 449 Serial Interface Standards Primary Cable : Primary Cable Secondary Cable : Secondary Cable Primary goals of new specifications : Compatibility with the RS-232 interface standard Replace the set of mnemonics used with RS 232 interface with more meaningful names Provide separate cables and connectors for the primary and secondary data channels Provide single ended or balanced transmission Reduce crosstalk Primary goals of new specifications Slide 9: Offer higher data transmission rates Provide loopback capabilities Improve performance and reliability Specify a Standard connector With RS 422A,acts a balanced interface cable. Operating speed:10Mbps and Span distances:1200 metres With RS 423A,acts as an unbalanced interface cable. Operating speed:100kbps and Span distances: upto 90 metres Category 1 and Category 2 circuits : Category 1 and Category 2 circuits Functional Description : Functional Description You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.