FULL DUPLEX RS485

Thread Starter

josepars

Joined Nov 28, 2018
73
Hi everyone. I confused about MAX3080E pins. In this image, what is the Y,Z, A and B pins. I want to communicate with device support RS485. Which are TX+, TX-,RX+,RX- pins. Which pins will send my data to other device and which pins will bring me data from device. Ekran Görüntüsü (182).png
 

nsaspook

Joined Aug 27, 2009
8,382
On your MAX3080E diagram
D means driver: transmit pins Y,Z
R means receiver: receive pins A,B

Don't expect every device to match this.
 

Thread Starter

josepars

Joined Nov 28, 2018
73
On your MAX3080E diagram
D means driver: transmit pins Y,Z
R means receiver: receive pins A,B

Don't expect every device to match this.
Yeah, master device will tranmit data with using Y,Z and for receiving will use A,B to communicate with slave device, right?
 

Marc Sugrue

Joined Jan 19, 2018
213
I did not understand which are my transmit pins A,B or Y,Z ?
For RS485 which is half duplex Y & A would connect together and Z & B would connect together. You would have to use the flow control lines to only transmit or receive at any one point in time which can be achieved by connecting the !RE & DE lines on the IC together so when High you can transmit and when low its in receive mode. RS422 uses all 4 wires.
 
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