Rs 485 Daisy Chain Wiring Diagram. The other topologies like star t drop or ring are not recommended. The rs 485 standards suggests that its nodes be networked in a daisy chain also known as party line or bus topology see figure 3 1.
The easiest and the best way to connect the devices in a modbus rtu rs485 communication is using daisy chain method. Slave 2 wire slave 2 wire cnv 100 converter lt x2 lt 4w 2w notes. Rs 485 daisy chain wiring diagram best wiring library rs485 wiring diagram.
As the rs 485 system recommends 120 ohm cables the biostar devices have 120 ohm resistors on board.
Connection between the devices. Occasionally the cables will cross. Rs485 half duplex wiring diagram two wire rs networks operate in half duplex mode on one twisted pair plus a the following diagram shows the daisy chain topology. It is also recommended that shielded twisted pair cables wire an rs 485 connection because it increases differential.