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Product Overview
The ABB Bailey SPASI23 Analog Input Module is a high-performance input module engineered for precise analog signal acquisition in distributed control systems (DCS), particularly in ABB’s INFI 90 and Symphony control platforms. Designed to interface with various process sensors and transmitters, the SPASI23 converts field analog signals (typically 4–20 mA) into digital values usable by the controller.
It supports high-density signal acquisition with robust electrical isolation and superior noise rejection, making it suitable for demanding industrial environments such as chemical processing, oil and gas, power generation, and water treatment. With 16 input channels, each individually configurable, the SPASI23 enables seamless integration into scalable automation architectures.
Key Features
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16 individually isolated analog input channels
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Accepts standard 4–20 mA current signals
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High accuracy and resolution
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Per-channel diagnostics and configuration
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Optical and galvanic isolation for signal integrity
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Built-in self-test and status LEDs
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Compatible with INFI 90 and Symphony DCS systems
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Hot-swappable under certain configurations
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Ruggedized for harsh industrial environments
Technical Specifications
| Item | Specification |
|---|---|
| Manufacturer | ABB |
| Product Name | Analog Input Module |
| Model Number | SPASI23 |
| System Compatibility | Symphony, INFI 90 DCS |
| Number of Channels | 16 analog input channels |
| Signal Type | 4–20 mA current loop |
| Input Impedance | 250 Ohms |
| Resolution | 12-bit or higher (depending on system setup) |
| Accuracy | ±0.1% of full scale |
| Isolation | Galvanic isolation per channel |
| Power Supply | Supplied by I/O chassis |
| Status Indicators | Per-channel diagnostics, module status LEDs |
| Operating Temperature Range | 0°C to +60°C |
| Storage Temperature Range | -40°C to +85°C |
| Humidity Range | 5% to 95% non-condensing |
| Mounting Type | Rack-mounted |
| Hot-Swappable | Yes (within redundancy systems) |
| Dimensions | 73.66 × 360.68 × 269.24 mm |
| Weight | 0.771 kg |
| Certifications | CE, UL, CSA (varies per batch) |
Industry Applications
The SPASI23 module is ideal for capturing analog signals from sensors and instruments in a range of process automation industries:
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Oil & Gas – Monitors pressures, flow rates, and temperatures in field installations.
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Chemical & Petrochemical – Provides accurate sensor data acquisition in process control environments.
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Power Generation – Interfaces with analog transducers in steam, gas, and hydro systems.
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Water & Wastewater – Collects flow, level, and pH measurements from field devices.
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Food & Beverage – Enables sanitary process control with analog sensors in critical points.
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Pulp & Paper – Supports monitoring of tank levels, pressure, and other continuous variables.
Product Advantages
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High Density – 16 analog inputs in a single module reduce footprint and wiring costs.
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Superior Signal Integrity – Galvanic isolation and robust design prevent ground loops and signal noise.
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Flexible Configuration – Per-channel setup allows tailored use based on sensor type or process need.
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Built-in Diagnostics – LEDs and self-test functions help quickly identify failures or irregularities.
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Seamless Integration – Designed to plug directly into Symphony and INFI 90 control architectures.
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Durable Construction – Withstands temperature extremes and industrial interference without degradation.
Frequently Asked Questions (FAQ)
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Q: How many input channels does the SPASI23 have?
A: It supports 16 analog input channels. -
Q: What kind of input signals does it accept?
A: It is designed for 4–20 mA current loop signals. -
Q: Is each channel isolated from the others?
A: Yes, each channel is galvanically isolated for signal integrity and safety. -
Q: Can the SPASI23 be used in redundant configurations?
A: Yes, it supports use in redundant I/O systems for increased availability. -
Q: Does the module provide any diagnostics?
A: Yes, it includes per-channel diagnostics and LED status indicators. -
Q: Is it compatible with ABB Symphony DCS?
A: Yes, it works seamlessly with Symphony and INFI 90 control platforms. -
Q: What is the accuracy of the analog readings?
A: Typically ±0.1% of full scale under standard conditions. -
Q: How is the module powered?
A: Power is supplied from the I/O chassis it is mounted in. -
Q: Can this module be hot-swapped?
A: Yes, in systems configured for redundancy, it can be hot-swapped without interrupting operation. -
Q: What is the typical use case for this module?
A: It is used for acquiring analog signals from field sensors such as pressure, flow, level, or temperature transmitters.
Related ABB Bailey Models
| Model | Description |
|---|---|
| SPASI02 | Analog Input Module with 8 Channels |
| SPASI12 | Isolated Analog Input Module |
| SPASI14 | Extended Range Analog Input Module |
| SPAIC02 | Analog Input Conditioner Module |
| SPACA01 | Analog Control Module |
| IMASI23 | Symphony-compatible Analog Input Module |
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| Model | Description |
|---|---|
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