20Relayoutput R1A Relay Get by the Code F6.04 and F6.05,defined as a variety of functions forRelayTxA-TxC:Normally-open contact;TxB-TxC:Normally-closed contact;Max contact capacity:AC250V/2A ,DC30V/1AR1BR1CCommunicationA+ RS485 anode Standard 485 interfaceB- RS485 cathode