Rịba ama amaokwu a dị n'okpuru ma zaa ajụjụ ahụ mgbe e mesịrị n'otu asụsụ ahụ dị ka amaokwu ahụ:  Passage: Na nnyefe eletriki dịka EIA-485, a na-eji eriri eriri abụọ nwere mgbochi nke 150 ohms na topology bọs. Enwere ike iji ọnụego bit site na 9.6 kbit / s ruo 12 Mbit / s. Ogologo eriri dị n'etiti ndị na-emegharị ugboro abụọ na-ejedebe site na 100 ruo 1200 m, dabere na ọnụego bit eji. A na-ejikarị usoro nnyefe a na PROFIBUS DP.  Ajụjụ: Na topology bọs, ole ka mgbochi (na ohms) nwere eriri eriri abụọ?
150 ohms