How to daisy chain 485

冰魄3009

How to daisy chain 485 [Copy link]

485 Hand in hand daisy chain pcb wiring method?

冰魄3009

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chunyang

485 does not allow branches that are larger than or close to the shortest wavelength of the signal. When designing the node, leave two bus interfaces, one input and one output, and place the 485 interface chip nearby.

冰魄3009

chunyang posted on 2018-11-28 12:41 485 does not allow branches that are larger than or close to the shortest wavelength of the signal. When designing a node, leave two bus interfaces, one in and one out, and place the 485 interface chip nearby...

Are the two wires of slave 1 and slave 11 also directly connected via AA BB?

chunyang

Bingpo3009 posted on 2018-11-28 13:12 Are the two wires of slave 1 and slave 11 also directly connected by AA BB?

All nodes are A to A, B to B, see the previous post for the principle.

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chunyang posted on 2018-11-28 14:08 All nodes are A connected to A, B connected to B, see the previous post for the principle.

Is the above picture correct?

chunyang

Bingpo3009 posted on 2018-11-28 14:18 Is the above picture correct?

Your picture is meaningless. I can't tell how it is connected. I suggest you figure out the principles first.

冰魄3009

How do you achieve the hand-in-hand wiring method of ABC? How do you handle the two bus interfaces of the incoming and outgoing lines of B in the middle?