RS-485 and RS-422 are in wide use as an interface for telecommunica- tions, industrial, medical, security and networking applications. The fol- lowing sections describe examples of some of popular physical topologies.
3.1 RS-422 Point-to-Point Circuit
This is the simplest configuration, just one driver and one receiver. If termination is used, it is only required at the receiver. Most RS-422 cables used to connect telecom or data-com equipment are point to point links.
The converter can convert an RS-232 device into a Driver node in this point-to-point circuit.
The configuration is: | |
SW1-4 | TXE | Enable Driver always |
SW1-6 | RXC | Enable Receiver RTS/ADC Control |
SW1-5 | RTS-D | Disable RTS control |
SW2-1 | SDD | Disable ADC control |
