need help for RS232 & RS485

Status
Not open for further replies.
S

smartshashi

Member level 4
Joined
Aug 11, 2004
Messages
68
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Activity points
513
can anybody tell me where i will get whole description of Rs232 & Rs485.
 

I've a question here about RS485 wiring.

Let's say if somebody connect the A & B wrongly for RS485 interface, i.e. A becomes B and B becomes A. What's going to happen? What will the output signal be due to this wrong connection?
 

Connecting A to B and B to A will not cause any damage ..
However, signals will be reversed in phase - "0" becomes "1" and vice versa - so, receivers will not read wrongly connected transmitter and wrongly connected receiver will not read the other transmitters ..

Regards,
IanP
 

I see. Last time I'm afraid that connecting A & B wrongly may cause damage to the IC. Connecting A & B wrongly will make the signal get inverted. Is it possible to use some automatic mechanism to inverse the signals back automatically if wrong signals detected due to wrong connections of A & B then?
 

I tried to use logic gates to invert the signals in the case that A & B are connected wrongly. The signal inversion done by the logic gates manage to make the devices resume communications. Anyway, what will be the signal level of A & B in case that A & B are connected wrongly when all transmitters and receivers are in tri-state?
 

I like rs 232 and this is usful info
 

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…