How to configure and calibrate 4-20mA analog input on EC32/EC60 RTU remote terminals?
EC32/EC60 RTU offers 4 isolated 4-20mA inputs with ±0.1% accuracy and calibration
Ecolor's EC32/EC60 RTU remote terminal units feature precision 4-20mA analog input channels designed for industrial current loop signal acquisition. Configuration and calibration procedures:
- Hardware specifications: 4 isolated 4-20mA input channels, 250Ω input impedance, ±0.1% FS accuracy
- Range configuration: Set engineering units via web interface - lower limit (4mA value) and upper limit (20mA value)
- Zero calibration: Apply 4mA reference signal and execute zero-point calibration in calibration menu
- Span calibration: Apply 20mA reference signal and perform full-scale calibration for linearity
- Digital filtering: Configurable filter time constant 0.1-60 seconds for noise reduction
- Alarm setup: High/low limit alarms, wire break detection, over-range protection
Ideal for monitoring electromagnetic flowmeters, pressure transmitters, level sensors, and other 4-20mA industrial instruments with remote data logging capabilities.
RTU Remote Terminal Unit