HP rp5430 HP DTC Cabling and Racking Guide - Page 78
RS-422/RS-423 compatibility, Terminal connections
View all HP rp5430 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 78 highlights
8 A note on standards RS-422/RS-423 compatibility RS-422 and RS-423 are both compatible since they specify the same electrical characteristics for the receiver. However, when connecting devices with different baud rate and distance capabilities, the connection is limited to the baud rate and distance supported by the device with the slower/shorter distance specification. Data In RS-423 Txa Txb RS-422 Rxa Rxb + Data Out Data Out - -Rxa + Rxb Txa Data In Txb Terminal connections Direct terminal connections can be made using either the RS-232, RS-423, or RS422 standards. The table below gives details for each. The distance, data rate, and distance/data rate ratio given here are all maximum values. The conductors column gives the number of conductors necessary for a full-duplex direct connection. Transmission RS-232 Single-ended RS-423 Single-ended RS-422 Differential Conductors Dist 3 50ft 4 4000ft 4 4000ft Data Rate Dist x Data Rate 20 kBaud 100kBaud-ft 100 kBaud 4 MBaud-ft 10 MBaud 400 MBaud-ft 72