Technical Specifications Appendix AOEM4 Family Installation and Operation User Manual Rev 12 117INPUT/OUTPUT DATA INTERFACECOM1Electrical format User-selectable. Defaults to RS232 but can be configured for RS422. SeeSection 3.2.5.1 on Page 36 for more details. (Can also be factory configuredfor LVTTL operation)Bit ratesa 300, 1200, 4800, 9600 (default), 19200, 38400, 57600, 115200, 230400,460800, 921600 bpsLead input CTS for RS232Lead output RTS for RS232Signals supported TX, RX, RTS, CTS for RS232 / TXD(+), TXD(-), RXD(+), RXD(-) for RS422COM2Electrical format RS232 (Can be factory configured for LVTTL operation)Bit ratesa 300, 1200, 4800, 9600 (default), 19200, 38400, 57600, 115200, 230400 bpsLead input CTS and DCDLead output RTS and DTRSignals supported TX, RX, RTS, CTS, DTR, DCDCOM3Electrical format LVTTL (Can be factory configured for RS232 or RS422 operation)Bit ratesa 300, 1200, 4800, 9600 (default), 19200, 38400, 57600, 115200, 230400 bpsLead input CTSLead output RTSSignals supported TX, RX, RTS, CTSUSB(Requires Firmware Version 2.100 or HIGHER)Signals supported USB D(+), USB D(-)a. Baud rates higher than 115,200 bps are not supported by standard PC hardware. Special PC hard-ware is required for higher rates, including 230400 bps, 460800 bps, and 921600 bps.