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Product Overview
The ABB DSAI 155A (Part Number: 3BSE014162R1) is a high-performance thermocouple input module designed for use in ABB’s Advant Master DCS or 800xA control platforms. It is part of the DSAI (Digital Signal Analog Input) series and specializes in acquiring temperature signals from thermocouples, converting them into reliable digital data for control and monitoring purposes.
Engineered to support multiple thermocouple types, including Type K, J, T, and others, the DSAI 155A is equipped with high accuracy, cold junction compensation (CJC), and galvanic isolation between channels and system bus. This makes it an ideal solution for demanding industrial applications where precision temperature monitoring is crucial, such as in power plants, refineries, chemical processing, and metallurgical environments.
Its robust design, diagnostics features, and ease of integration with ABB’s distributed control architecture make it a dependable solution for mission-critical temperature measurement tasks.
Product Specifications
| Parameter | Details |
|---|---|
| Model Number | DSAI 155A |
| Part Number | 3BSE014162R1 |
| Module Type | Thermocouple Input Module |
| Supported Sensor Types | Type K, J, T, N, E, R, S, B thermocouples |
| Number of Input Channels | 8 individual thermocouple inputs |
| Input Signal Range | Thermocouple voltage (μV to mV depending on type) |
| Cold Junction Compensation | Yes (internal CJC for accuracy) |
| Measurement Accuracy | ±0.1% of full-scale (typical) |
| Resolution | 16-bit |
| Input Isolation | Galvanically isolated inputs from bus and each other |
| Internal Diagnostics | Channel fault detection, temperature overrange, signal loss |
| Input Refresh Time | <200 ms total for all channels |
| Operating Voltage | Supplied through system bus (typically 5 VDC logic level) |
| Power Consumption | Approx. 2.5 W |
| Operating Temperature | 0°C to +55°C |
| Storage Temperature | -40°C to +70°C |
| Humidity | 5% to 95% RH, non-condensing |
| Mounting Type | DIN-rail/module rack-mounted |
| Dimensions (H × W × D) | 255 x 15 x 363 mm |
| Weight | 0.5 kg |
| System Compatibility | Advant Master DCS, Symphony, ABB 800xA |
| Certifications | CE, UL, RoHS |
| Manufacturer | ABB Ltd. |
Applications
The DSAI 155A thermocouple module is purpose-built for accurate and fast temperature measurement in harsh and controlled industrial settings. It is well-suited for applications requiring consistent thermal monitoring, fast signal conversion, and high system reliability.
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Power Generation: Steam turbine and generator temperature sensing
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Chemical & Petrochemical Plants: Reactor, furnace, and pipe temperature feedback
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Metallurgy & Steel Plants: Monitoring smelters, kilns, and casting temperatures
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Oil & Gas: Heat exchanger, distillation column, and combustion analysis
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Food & Beverage: Oven, freezer, and pasteurization temperature monitoring
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Pharmaceutical Manufacturing: Bioreactor and controlled chamber temperature control
These applications benefit from the DSAI 155A’s noise immunity, precision, and compatibility with industrial-grade thermocouples.
Product Advantages
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Multi-Type Thermocouple Support: Handles a wide range of thermocouple types including exotic high-temperature sensors.
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High Signal Accuracy: 16-bit resolution and cold junction compensation ensure reliable data for control algorithms.
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Built-in Diagnostics: Automatically detects broken wires, out-of-range temperatures, or input faults.
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Robust Industrial Design: Withstands fluctuating temperatures, electromagnetic interference, and field conditions.
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Flexible Integration: Compatible with ABB’s Advant Master, Symphony, and 800xA systems.
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Scalable Architecture: Easily expanded in modular DCS environments for large-scale installations.
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Channel Isolation: Prevents fault propagation across channels and to the control system.
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Compact Footprint: DIN-rail mounting saves space in control cabinets while maintaining accessibility.
Frequently Asked Questions (FAQ)
1. What thermocouple types are supported by the DSAI 155A module?
It supports Type K, J, T, E, N, R, S, and B thermocouples for broad industrial use.
2. How many channels does this module provide?
The DSAI 155A offers 8 individual thermocouple input channels.
3. Is cold junction compensation built into the module?
Yes, the module includes internal CJC for enhanced measurement accuracy.
4. Can it be used with non-ABB systems?
It is designed for use within ABB systems but can potentially interface with others using suitable hardware.
5. What is the typical accuracy of the module?
It offers a typical measurement accuracy of ±0.1% of full scale.
6. How is the module mounted?
It is DIN-rail or rack-mounted within ABB’s standard control cabinets.
7. What diagnostics are available?
It can detect sensor disconnection, overrange temperature, or faulty signals per channel.
8. What kind of isolation does it have?
Each input is galvanically isolated from each other and from the system bus.
9. What is the resolution of the signal conversion?
The module provides 16-bit resolution for detailed signal analysis.
10. Is this module field-replaceable?
Yes, the module is designed for easy installation and replacement in the field or service bay.
Related Models from the DSAI Series or Similar
| Model Number | Description | Input Type | Channels | Mounting | Weight (kg) |
|---|---|---|---|---|---|
| DSAI 130 | Analog Input Module | mA/Voltage | 8 | DIN rail | 0.50 |
| DSAI 133 | Fast Analog Input Module | Voltage | 4 | Panel Mount | 0.52 |
| DSAO 120 | Analog Output Module | Voltage/Current | 8 | DIN rail | 0.53 |
| DSDI 130 | Digital Input Module | 24 VDC | 16 | DIN rail | 0.48 |
| DSDO 120 | Digital Output Module | 24 VDC | 16 | Panel Mount | 0.47 |
| DSAI 145A | Advanced Thermocouple Module | T/C (K, J, E) | 8 | DIN rail | 0.56 |
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