... in, for long terms data recordUp to 16-points recording( option)Maximum 16 points relay output,(option)Could ... auxiliary power supply for sensors. USB port: plug and play. Support 1GB,2GB,..USB flash driveCommunication: RS485,RS232, MODBUS ... 3, 4, 5,6s……16-channels record time: 360 days(record interval time is 1m). Record Interval1S2S3S4S5S10S…….60S……3600SRecord Time3days6days9days12days15days30days ...