... :Petroleum, Chemical, Pharmaceutical, Metallurgy, Paper, Electricity, Nuclear power, Food, Cement, Building, aviation, Medical University lab, Marine ... -20mA, or one point 24VDC auxiliary power supply for 2 wires system Various data display: circule chart, bargraph ... : 4-20mA , up 2 points24VDC , 50mA auxiliary power supplyCommunication: RS232, RS485 MODBUS-RTU protocolPrinting: RS232 printUSBAlarm ...