Product Short Description
SPASI23 is a 16-channel high-performance analog input module within ABB’s Bailey INFI 90 / Symphony Plus I/O family. It converts field signals from thermocouples (TC), RTDs, thermistors, millivolt sources, voltage and current loops into high-resolution digital data for controllers such as AC 800M, Symphony Plus, or any PLC/DCS that supports Modbus RTU or proprietary Bailey Controlway .
Description
Technical Specifications
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Input channels: 16
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Signal types & ranges
– Thermocouple: –200 °C to +1 800 °C (all standard types B, E, J, K, N, R, S, T)
– RTD: –200 °C to +800 °C (Pt100, Pt1000, Ni120, Cu50, Cu100)
– Thermistor: –50 °C to +150 °C
– Voltage: –10 V to +10 V, 0–10 V, ±2.5 V, 1–5 V
– Current: –20 mA to +20 mA, 4–20 mA -
ADC resolution: 16-bit (24-bit front-end Σ-Δ)
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Accuracy: ±0.1 % of full scale
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Conversion time: 250 µs per channel
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Isolation: 2 500 V RMS channel-to-ground, 1 500 V channel-to-channel
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Communication: RS-485 Modbus RTU; Profibus DP, Controlway (optional)
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Power supply: 24 VDC ±10 %, 2.5 W
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Operating temperature: –40 °C to +70 °C
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Storage temperature: –55 °C to +85 °C
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Humidity: 0 % – 95 % RH non-condensing
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Dimensions: 73.66 mm × 360.68 mm × 269.24 mm (6U single-slot)
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Weight: 0.771 kg
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Mounting: DIN rail or rack installation; includes terminal board and cables .
Functional Features
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Universal inputs: each channel independently configurable via software for any of the listed signal types.
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High-speed sampling and filtering: built-in anti-aliasing and digital averaging for noise immunity.
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Hot-swap support: module can be replaced without powering down the rack.
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Self-diagnostics: open-circuit, short-circuit, over-range alarms with LED indication and register flags.
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Redundancy-ready: supports dual-module configurations and address-coded cascading for larger channel counts.
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Easy integration: drop-in replacement for legacy IMASI03/IMASI13 modules with minimal configuration changes .
Typical Applications
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Process control: temperature, pressure, flow and level loops in chemical, petrochemical, pharmaceutical and food plants.
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Power generation: turbine metal temperature, boiler flue-gas, generator stator RTDs.
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Oil & gas: wellhead thermocouples, pipeline RTD leak detection, refinery distillation column profiling.
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Environmental monitoring: air-quality, water-quality and stack emission measurement systems.
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Laboratory & test rigs: engine test cells, climatic chambers, material testing machines.
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Building and energy management: HVAC, solar thermal, district heating metering .
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