... has good capability Multi-Output Interface4~20mA, Pulse, Alarm Outputs, RS-485 and Modbus Communication Technical dataNominal Meter Size 10 to ... isolationUpper Alarm-ALMH, Lower Alarm-ALML with photoelectric isolation CommunicationsRS-232 without galvanic isolationRS-485 with galvanic isolation, MODBUS. Supply Power85 ...