... used the advanced technology, to be designed high quality and performance, isolated, high accuracy, universal use, to be aimed to monitor, record, analysis ... -5V0-5V1.000 to 5.000V0.000 to 5.000VDC Current0 to 10mA4 to 20mA0.000 to 10.000mA4.000 to 20.000mA Output ... ,24VDC auxiliary power supply for sensors. USB port: plug and play. Support 1GB,2GB,..USB flash driveCommunication: RS485,RS232, MODBUS-RTU ...