Description
‑ Power Supply：Power supplied by rack back‑plane, 5VDC logic power supply
‑ Mechanical Structure：Rack plug‑in module for Symphony Plus rack；overall weight approx 0.58kg
‑ On‑board Resources：On‑board signal conditioning circuit, 24‑bit high‑precision A/D converter, cold‑junction compensation circuit, lead‑wire resistance compensation circuit, channel self‑diagnosis circuit, on‑board calibration storage
‑ Communication Interface：Internal rack back‑plane module bus for communicating with station processor.
‑ Galvanic Isolation：Channel‑group isolation, isolation voltage 1500VRMS, restrain ground loop interference from field sensors。
‑ Core Function：Multi‑type field analog signal acquisition, high‑precision A/D conversion, thermocouple cold‑junction compensation, RTD lead‑wire compensation, channel fault diagnosis, convert raw signal to engineering value and upload to station processor.
‑ Protection：Per‑channel input over‑voltage and surge protection.
‑ Status LED Indicators：Power LED, fault LED, module status LED.
‑ Weight：approx 0.58kg
‑ SPASI23 is universal 16‑channel analog input card for Symphony Plus. Each channel can be independently configured. Support multiple thermocouple types B/E/J/K/N/R/S/T/U; support platinum, copper, nickel RTD thermal resistance; also support 4‑20mA current, 0‑10V, ±10V voltage and millivolt input signals。
‑ On‑board realizes cold‑junction compensation for thermocouple, lead‑wire resistance compensation for 3‑wire RTD, automatically complete engineering unit conversion, reduce calculation burden of station processor. Support channel open‑circuit, short‑circuit, over‑range fault detection.
‑ Built‑in comprehensive self‑diagnosis: detect module hardware failure, channel signal abnormality, field loop fault; fault alarm information upload to DCS operator station.
‑ Installed on Symphony Plus standard rack, cannot work independently, must cooperate with station processor and matched terminal wiring unit for field sensor connection.
Difference compared with NRAI01：NRAI01 belongs to old‑generation INFI90 Harmony series; SPASI23 is upgraded Symphony Plus universal AI module, owns built‑in cold‑junction and lead‑wire compensation, higher sampling precision and richer signal types.
‑ Complete multi‑type field analog signal acquisition, pre‑processing and A‑D conversion, upload engineering converted process value to station processor.
‑ Monitor module hardware running status and each channel signal health status, fault information upload to DCS system.
‑ No independent process control logic function, all control algorithm executed by upper‑level station processor.
‑ Back‑plane：Rack internal back‑plane module bus for data communication and module power supply.
‑ External interfaces：Connect field sensors and transmitters through supporting terminal wiring unit.
‑ Mounting：Plug‑in installation on Symphony Plus standard rack
‑ Operating Temperature：0 ℃ ~ +70 ℃
‑ Storage Temperature：‑40 ℃ ~ +85 ℃
‑ Relative Humidity：5‑95 %RH, non‑condensing
‑ Pollution degree：Degree 2
‑ Protection Class：IP20, cabinet‑internal installation。
- SPASI23 smart process analog input slave module（6643932X1）
Complementary parts: Symphony Plus rack, station processor, matched analog input terminal unit, thermocouple / RTD / 4‑20mA field sensors, shielded signal cable, system network, operator station.
‑ Insert module into correct I/O slot of Symphony Plus rack, tighten front‑panel locking knobs to guarantee reliable back‑plane connector contact.
‑ Field signal wiring adopt shielded cable, separate layout from high‑voltage power cable to avoid electromagnetic interference. Channel configuration must match actual field sensor type.
‑ Module replacement recommends power‑off operation. After replacement, download corresponding configuration, verify each channel process value consistent with field instrument reading.
‑ For RTD application, confirm three‑wire wiring mode; for thermocouple, pay attention to positive‑negative polarity of thermal wire.
Power plant, petrochemical, pulp‑and‑paper industry Symphony Plus DCS control cabinets; universal multi‑signal analog acquisition spare‑part, collect temperature, pressure, flow and other process parameters from field sensors.
- ABB Symphony Plus SPASI23 universal analog input slave module (6643932X1), high‑density 16‑channel universal AI card for Symphony Plus DCS。
- Support thermocouple, RTD, 4‑20mA, voltage, millivolt multi‑signal input, onboard cold‑junction compensation and RTD lead‑wire resistance compensation, 24‑bit high‑precision A/D conversion.
- Group‑channel galvanic isolation, per‑channel surge & over‑voltage protection, abundant hardware and channel fault self‑diagnosis, alarm upload function.
- Rack plug‑in structure, cabinet‑internal IP20 application, cooperate with special terminal unit for field sensor wiring.
- Complete signal pre‑processing on‑board, reduce processor load, no independent control logic. Distinguished from old‑generation NRAI01 Harmony series AI module.
- Discontinued legacy DCS spare‑part, used for old‑system maintenance and retrofit projects。
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