The DAT9000 and DAT9011 Modbus Masters and Modbus Slaves range of controllers have Ethernet, RS485, RS232 and USB ports. Options on these units have on board digital and analog IO and the DAT9011DL has data logging capability that logs data from not only it's own inputs but the DAT3000 series and other connected slaves from other manufacturers. The data is logged to the USB port which is situated on the front face of the DAT9011DL and can take an 8G USB thumb drive.The DAT3500 series is a range of communication isolators and converters which includes isolating RS485, RS232, RS422 signals from the field to the control room. It is also able to extend the range of the signals. The options that are available are RS232 to RS485 or RS422, USB to RS485 or RS422, Ethernet to RS485 or RS422, Ethernet to RS485.