Feature Hardware Interface Connector: DB9 male 2 Bus: 32 bit Universal PCI Signal RS-422: T/R+, T/R-, RXD+, RXD-, GND RS-485: Data+(A) Data-(B) GND Transmission;300bps-115.2kbps Data bits: 5, 6, 7, 8 Stop bits: 1, 1.5, 2 Parity: None, Even, odd, Space, Mark Flow Control: RTS/CTS XON/XOFF Operating Temperature: 0~70℃ Optical Isolation Protection: Isolation Voltage2500Vrms 500VDCContinuous DC/DC Module