... --9999 Auxilliary power: 24V/12V/30mA DA series Process Indicator for voltage & ampere measurementFeatures:1) Input: mA, mV, V, ... (30mA) auxiliary sensor power.6) RS232 or RS485 Communication, Modbus RTU Protocol.7) Power supply: ... TC and RTD), Panel Meter, Sensor Meter, inductor, Power Meter, Coulometer, Voltage Meter, Ampere Meter, Counter, Tacho Meter, Frequency Meter, flowmeter,Timer,Timer Relay ...