... direction auto-turnaround, no flow control is required 5. Point to multi point, support 128 nodes loopbackSpecification: Standards: EIA RS ... -485 signal: D+, D-, GNDWorking mode: Asynchronism, point to point, 4 wire full-duplexTransfer rate: 300~115200bps, auto ... direction auto-turnaround, no flow control is required 5. Point to multi point, support 128 nodes loopbackSpecification: Standards: EIA RS ...