... rank 4.Customizable, OEM&ODM Introduction1.Specification 8 Channel Analog Input 8 One Form A Relay output ... RS232( 3 wire) ,1 RS485 Modbus RTU2.Parameters Analog input 8 Channel Analog Input, 0~5v or 0~ ... 1KHz Maximum Counter Frequency Digit relay Output 8 Channel Relay Output One Form A (SPST) 250V/ ... Directly connect to IO terminals Communication 1 RS485 or RS232( 3 wire) ,1 RS485, Modbus RTU Max baud ...