METSO IOP302

Technical Specifications​

Eight independent analog input channels are provided as standard. Supported signal types include 4-20 mA, 0-20 mA, 0-5 V, 0-10 V and ±10 V; temperature configurations support Pt100, Pt1000, Cu50 and thermocouples K/J/T/E/S/R/B on compatible ordering variants. Current input impedance is approximately 250 Ω. Voltage input impedance is 1 MΩ or higher. A/D resolution depends on system firmware and typically provides 12-bit to 16-bit conversion; engineering configuration should be checked against the installed DNA/IOP firmware. Accuracy is ±0.1 percent of full scale under specified calibration conditions. Sampling rate is configurable per channel according to DPU load, commonly 10 to 100 conversions per second per channel on high-speed variants. Galvanic isolation is provided between field and logic sides and, on selected configurations, between channels. Backplane supply is 24 V DC with low power consumption suitable for rack installation. Operating temperature is 0 °C to +60 °C for standard rack variants. Storage temperature is -40 °C to +85 °C. Relative humidity is 5 to 95 percent non-condensing. Protection rating is IP20 for cabinet installation.

Functional Features​

Signal conditioning, filtering, linearization, cold-junction compensation for thermocouples, open-circuit and over-range detection, self-diagnostics, per-channel configuration and status indication through system diagnostics.

Applications​

Pulp and paper processes, mining, metallurgy, power generation, chemical plants, oil and gas utilities, and water/wastewater treatment where isolated analog acquisition is required.

Construction And Materials​

Rack or carrier-mounted I/O card with matched terminal base, field-side electronics, isolation barriers, A/D conversion stage and backplane connector. Industrial plastic/metal faceplate with status LEDs.

Working Principle​

Field current or voltage is received through the terminal base, conditioned and converted by the A/D stage, electrically isolated from the logic side, scaled according to the configured engineering range and transmitted to the DPU over the backplane bus.

Installation Requirements​

Install the card in the designated Metso/Valmet DNA I/O carrier or S-series rack with the correct terminal base. Configure channel type, range, filtering and cold-junction parameters in the DNA engineering tool. Ground the shield and terminal base according to system grounding rules. Verify loop power for active transmitters.

Precautions​

Configure each channel strictly for current, voltage or temperature before wiring. Do not apply voltage to a current-input channel without proper shunt configuration. For thermocouples, verify cold-junction compensation and sensor type. Check open-circuit detection settings to avoid false alarms. Prevent condensation and maintain cabinet temperature within the specified range.