Description
‑ Power Supply：Power supplied by Harmony rack back‑plane, 5VDC back‑plane logic power supply
‑ Mechanical Structure：Rack plug‑in module for Symphony Harmony rack；overall weight approx 0.38kg
‑ On‑board Resources：Multi‑channel A/D conversion circuit, signal conditioning circuit, channel‑level fault detection circuit, hardware self‑diagnosis circuit.
‑ Communication Interface：Internal rack back‑plane module bus for communicating with station processor.
‑ Galvanic Isolation：Channel‑to‑system galvanic isolation, suppress ground loop interference from field transmitters.
‑ Core Function：Field analog signal acquisition, A/D analog‑to‑digital conversion, open‑circuit detection, channel fault diagnosis, transmit digital process value to station processor via back‑plane bus.
‑ Protection：Input over‑voltage and surge protection for each analog channel.
‑ Status LED Indicators：Module run LED, fault LED, per‑channel signal status LED.
‑ Weight：approx 0.38kg
‑ NRAI01 is analog input slave card for INFI90 Harmony station, multiple configurable analog input channels, adapt to two‑wire transmitters 4‑20mA and voltage signal 0‑10V. Support channel open‑circuit fault detection, can identify broken field transmitter wiring.
‑ Each channel completes signal conditioning and A/D conversion, converts field physical quantity into DCS internal point value, upload to MFP/BRC processor through rack back‑plane bus. Filter time can be configured by function‑code to restrain industrial site high‑frequency noise.
‑ Built‑in hardware self‑diagnosis: detect module hardware failure, channel over‑range, field circuit open‑circuit; fault alarm information upload to DCS operator station.
‑ Installed on Symphony Harmony standard rack, cannot work independently, must cooperate with station processor and matched terminal unit for field instrument wiring.
Difference compared with IMMPI01 / IMSPM01：NRAI01 is field analog signal acquisition I/O module; IMSPM01 / IMMPI01 belong to serial communication interface modules, not for analog measuring.
‑ Complete field analog signal collection and A/D conversion, upload process value to station processor.
‑ Monitor module hardware status and each channel signal health status, open‑circuit / over‑range fault upload to DCS system.
‑ No independent process control logic function, control algorithm runs in upper‑level MFP/BRC processor.
‑ Back‑plane：Rack internal back‑plane module bus for data communication and module power supply.
‑ External interfaces：Connect field transmitters through supporting terminal wiring unit.
‑ Mounting：Plug‑in installation on Symphony Harmony standard rack
‑ Operating Temperature：‑20 ℃ ~ +60 ℃
‑ Storage Temperature：‑40 ℃ ~ +85 ℃
‑ Relative Humidity：5‑95 %RH, non‑condensing
‑ Pollution degree：Degree 2
‑ Protection Class：IP20, cabinet‑internal installation.
- NRAI01 analog input slave module（3BSE008602R1）
Complementary parts: Symphony Harmony rack, MFP / BRC series processor, matched analog input terminal unit, field 4‑20mA / 0‑10V transmitters, shielded signal cable, INFI‑NET network, operator station.
‑ Insert module into correct I/O slot of Harmony rack, tighten front‑panel screws to ensure reliable back‑plane connector contact.
‑ Field analog signal wiring adopt shielded cable, separate layout from high‑voltage power cable, reduce electromagnetic interference. Confirm channel configuration matches field transmitter signal type.
‑ Module replacement recommends power‑off operation. After replacement, download corresponding function‑code configuration, verify each channel process value consistent with field instrument indication.
‑ Two‑wire transmitter loop power is supplied by matched terminal unit, check loop power supply when open‑circuit alarm appears.
Power plant, petrochemical, pulp‑and‑paper industry Symphony INFI90 DCS control cabinets; analog signal acquisition spare‑part for Harmony system, collect pressure, flow, temperature transmitter signals.
- ABB Symphony Harmony NRAI01 analog input slave module (3BSE008602R1), standard analog‑input I/O slave module for INFI90 DCS.
- Support 4‑20mA two‑wire transmitter and 0‑10V voltage signal input, channel‑level open‑circuit detection, configurable digital filter.
- Galvanic isolation between field side and DCS system side, per‑channel over‑voltage protection, abundant hardware and channel fault self‑diagnosis, alarm upload.
- Rack plug‑in structure, cooperate with special terminal unit for field instrument wiring, cabinet‑internal IP20 application.
- Only undertake analog signal acquisition and A‑D conversion, control strategy executed by station processor.
- Discontinued legacy DCS spare‑part, used for old‑system maintenance and retrofit projects。
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