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ABB SB821 3BSE018109R1 – Complete Technical Overview and Product Specification Guide
1. Basic Product Information
Product Model: ABB SB821
Part Number: 3BSE018109R1
Brand: ABB
Series: SB Signal Conditioning & Transducer Series
Product Type: Industrial Analog Signal Conditioner / Transducer
Category: Industrial Signal Processing and Measurement Module
The ABB SB821 is a high‑performance analog signal conditioner designed for precision processing, isolation, scaling, and transmission of analog measurement signals from various field sensors to industrial controllers and instrumentation systems.
2. Product Introduction
The ABB SB821 3BSE018109R1 is an advanced industrial signal conditioning module that accepts raw analog inputs from field devices such as voltage sources, current loops, thermocouples, resistance temperature detectors (RTDs), and other instrumentation sensors. Its purpose is to condition those signals—filtering noise, scaling and linearizing responses, and electrically isolating the input from the output—before delivering a stable, standardized analog output such as 4–20 mA or 0–10 V.
By isolating and accurately conditioning sensor signals, the SB821 ensures that downstream controllers, data acquisition systems, distributed control systems (DCS), and operator stations receive precise, distortion‑free analog information needed for reliable automation, monitoring, and control. This module is engineered for continuous operation in demanding industrial environments, with a compact DIN‑rail mounting form factor that simplifies installation in control cabinets and electrical racks.
3. Technical Specifications
Electrical, Mechanical and Operational Parameters
| Parameter | Specification |
|---|---|
| Model | SB821 |
| Part Number | 3BSE018109R1 |
| Series | SB Analog Signal Conditioning & Transducers |
| Product Type | Analog Signal Conditioner / Transducer |
| Supported Input Types | Voltage, Current, Thermocouple, RTD |
| Output Signal Types | 4–20 mA, 0–10 V |
| Input Impedance | High (type dependent) |
| Output Load Capability | Standard industrial loads |
| Electrical Isolation | Full galvanic isolation between input and output |
| Accuracy | ±0.1 % of full scale (typical) |
| Response Time | < 100 ms |
| Supply Voltage | 24 V DC |
| Power Consumption | < 5 W |
| Operating Temperature Range | –10 °C to +55 °C |
| Storage Temperature Range | –20 °C to +70 °C |
| Relative Humidity | 5 % to 95 % non‑condensing |
| Protection Rating | IP20 |
| Mounting Type | DIN‑Rail Mount |
| Connection Method | Screw Terminal |
| Dimensions (W × H × D) | 17.5 × 100 × 110 mm |
| Weight (kg) | 0.20 kg |
4. Product Applications
The SB821 conditioner is used in a wide range of industrial automation and process control environments. Its main function is to prepare raw analog signals from field devices for accurate interpretation and processing by controllers or monitoring systems.
Typical application scenarios include:
• Conditioning temperature measurements from thermocouples and RTDs.
• Scaling and linearizing pressure or level transmitter signals for control loops.
• Preparing analog feedback for programmable logic controllers (PLCs) and DCS inputs.
• Signal filtration to reduce electrical noise and prevent ground loop interference.
• Analog preprocessing for data acquisition, recording systems, and operator displays.
• Machine automation requiring precise analog signal feedback.
• Environmental monitoring and instrumentation systems.
• Utility and plant automation requiring isolated analog feedback.
In these contexts, the SB821 ensures that field signal disturbances do not propagate into automation systems, maintaining the quality of control and diagnostic feedback.
5. Product Advantages
High Precision Signal Conditioning
The SB821 delivers accurate scaling and linearization, enabling precise process measurement and control.
Galvanic Isolation for Signal Integrity
Complete electrical isolation between input and output eliminates ground loop issues and reduces noise interference.
Multi‑Input Flexibility
Supports multiple analog input types including RTDs, thermocouples, voltage, and current loops.
Standard Industrial Outputs
Provides standardized 4–20 mA and 0–10 V outputs compatible with PLCs, DCS units, and recorders.
Compact DIN‑Rail Mount Design
The small form factor allows space‑efficient installation inside control cabinets and electrical racks.
Reliable Industrial Performance
Designed for uninterrupted operation in industrial environments with wide temperature and humidity tolerance.
Low Power Operation
Operates on a standard low‑voltage 24 V DC supply with minimal power draw.
Ease of Installation and Maintenance
Screw terminal connections and a modular form factor simplify wiring and service.
6. Recommended Models from the Same Series or Related Devices
Below are five related analog signal conditioning or transducer modules from the SB family or with similar functional roles.
| Model | Supported Inputs | Output Type | Supply Voltage | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| SB170 | Voltage / Current | 4–20 mA | 24 V DC | 17.5×100×110 | 0.15 kg |
| SB171 | Voltage / Current / Thermocouple / RTD | 4–20 mA / 0–10 V | 24 V DC | 17.5×100×110 | 0.15 kg |
| SB172 | Thermocouple | 4–20 mA | 24 V DC | 17.5×100×110 | 0.15 kg |
| SB175 | RTD Only | 0–10 V | 24 V DC | 17.5×100×110 | 0.15 kg |
| SB821 | Voltage / Current / Thermocouple / RTD | 4–20 mA / 0–10 V | 24 V DC | 17.5×100×110 | 0.20 kg |
7. Five Popular Industrial Automation Models from the Same Brand
Below are five widely used automation hardware modules from ABB that are commonly used alongside signal conditioners like the SB821 in control and monitoring systems.
| Model | Device Type | Supply Voltage | Dimensions (mm) | Weight (kg) | Application |
|---|---|---|---|---|---|
| AC800M | Modular Controller | 24 V DC | 140×180×120 | 1.2 kg | Core automation CPU |
| PM856 | Processor Module | 24 V DC | 120×150×90 | 0.9 kg | Program control processor |
| CI870 | Communication Interface | 24 V DC | 120×150×90 | 0.8 kg | Field network interface |
| AI820 | Analog Input Module | 24 V DC | 120×150×80 | 0.6 kg | Multi‑channel analog acquisition |
| DI820 | Digital Input Module | 24 V DC | 120×150×80 | 0.6 kg | Digital signal acquisition |
8. Frequently Asked Questions (FAQ)
Q1: What is the main function of the SB821?
A: The SB821 conditions, scales, isolates, and transmits analog measurement signals for use in automation and monitoring systems.
Q2: What types of input signals does it support?
A: It supports voltage, current, thermocouple, and RTD analog inputs.
Q3: What type of analog outputs does the SB821 provide?
A: Standard outputs such as 4–20 mA and 0–10 V.
Q4: What power supply is required?
A: It operates on a standard 24 V DC industrial supply.
Q5: How much does the SB821 weigh?
A: The approximate weight is 0.20 kg.
Q6: What are the physical dimensions of the SB821 module?
A: Approximately 17.5 × 100 × 110 mm.
Q7: Where is this product typically installed?
A: It is usually mounted on DIN rails within industrial control cabinets.
Q8: Why is galvanic isolation important in signal conditioning?
A: Galvanic isolation prevents electrical noise and ground loop interference, improving signal accuracy and integrity.
Q9: In what industries is the SB821 commonly used?
A: It is widely used in manufacturing, utilities, environmental monitoring, and process control systems.
Q10: Can the SB821 operate continuously in industrial environments?
A: Yes, it is designed for continuous, stable operation under normal industrial temperature and humidity conditions.