The converter features RS-485 driver and receiver in one device. It also provides very flexible configuration settings for Driver Enable control and Receiver Enable control. The configuration for the node in RS-485 2- wire network is:
SW1-2&1 | 2W | Select 2-wire topology |
SW1-4 | TXC | Enable RTS/ADC Control for Driver |
SW1-6 | RXC | Enable RTS/ADC Control for Receiver |
SW1-5 | RTS-E | Use RTS control (optional) |
SW2-1 | SDE | Use ADC control (optional) |
SW2-2-8 | Baud | Baud when ADC control is enabled (optional) |
SW1-3 | T-D | Disable internal terminator (optional) |
3.5 RS-485 Full-duplex 4-wire Network
The 4-wire network simplifies bus arbitration in multi-node RS-485. A single Master node is the only driver allowed on the top most wire pair. All other nodes listen to all data traffic that passes on the party-line type multi-drop bus. Nodes may transmit on the lower pair of wires when addressed by the master node or by using a software token-passing bus arbitration scheme.
