| ??? 10/25/07 07:08 Read: times |
#146171 - Minimum RS422/485 Responding to: ???'s previous message |
Erik Malund said:
since you control both ends why not use RS422, the transceiver cost is about the same as RS232, for instance the DS8921AMX transceiver cost $0.60 at DigiKey. Erik This is a nice Idea , I am now trying to keep the power supply same , ie send VCC from one card along with GND to keep the GND noise under limits. BTW whats the minima distance of ones cable for RS422/RS485 link to establish. Maximum distance of 800mts I have done without any troubles. Thanks! APC |
| Topic | Author | Date |
| UART Maximum | 01/01/70 00:00 | |
| Baud rate ? | 01/01/70 00:00 | |
| Baud | 01/01/70 00:00 | |
| RS232? | 01/01/70 00:00 | |
| 100m on 4800 BPS | 01/01/70 00:00 | |
| How? | 01/01/70 00:00 | |
| true RS232 | 01/01/70 00:00 | |
| you do not say how | 01/01/70 00:00 | |
| a) ----- option only | 01/01/70 00:00 | |
| Twisted Pair | 01/01/70 00:00 | |
| He would not be THAT ignorant, I hope | 01/01/70 00:00 | |
| a much better idea | 01/01/70 00:00 | |
| Assumption | 01/01/70 00:00 | |
| a much better idea | 01/01/70 00:00 | |
| WRONG | 01/01/70 00:00 | |
| panacea ---> The Godess of all cure :) | 01/01/70 00:00 | |
| of course, you need to connect gnd | 01/01/70 00:00 | |
| ground problem isnt a problem | 01/01/70 00:00 | |
| Call a spade a spade... | 01/01/70 00:00 | |
| no, it is not | 01/01/70 00:00 | |
| Differential | 01/01/70 00:00 | |
| no, it is not | 01/01/70 00:00 | |
| Oh yes it is! | 01/01/70 00:00 | |
| since you control both ends ... | 01/01/70 00:00 | |
| Minimum RS422/485 | 01/01/70 00:00 | |
| mimum length for 485/422 | 01/01/70 00:00 | |
Thanks for the input to all | 01/01/70 00:00 |