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- 3BSC610037R1
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ABB SD821 3BSC610037R1 – Detailed Technical Overview and Product Specification Guide
1. Basic Product Information
Product Model: ABB SD821
Part Number: 3BSC610037R1
Brand: ABB
Series: SD Digital Signal Conditioning & Processor Modules
Product Type: Digital Signal Conditioner / Converter
Category: Industrial Signal Processing and Measurement Interface
The ABB SD821 is a high‑precision digital signal conditioning module designed to convert, scale, filter, and digitize analog sensor signals for reliable use in automation and control systems used in demanding industrial environments.
2. Product Introduction
The ABB SD821 3BSC610037R1 is an advanced industrial digital signal conditioner engineered to interface closely with raw analog inputs from field sensors and instrumentation. These inputs can originate from current loops, voltage sources, thermocouples, resistance temperature detectors (RTDs), and similar devices. The SD821 processes these signals by applying high‑resolution digital conversion, filtering noise, linearizing non‑linear characteristics, scaling the measurement outputs into engineering units, and providing electrical isolation to ensure integrity during transmission to control systems.
Unlike simple analog conditioners, the SD821 integrates digital signal processing internally to deliver highly stable conditioned outputs directed to programmable logic controllers (PLCs), distributed control systems (DCS), data acquisition (DAQ) modules, operator interfaces, and other industrial automation equipment. Enhanced digital conversion and filtering enable this module to improve noise immunity, reduce error, and provide accurate real‑time measurement feedback essential for modern control logic.
The SD821 is designed for continuous 24/7 operation in industrial settings where signal quality and reliability are critical. Its DIN‑rail mounting form factor allows space‑efficient installation inside control cabinets, electrical racks, and automation panels. With its digital processing capabilities, the SD821 bridges the gap between analog field measurement signals and digitally oriented control architectures.
3. Technical Specifications
Electrical, Mechanical, and Operational Parameters
| Parameter | Specification |
|---|---|
| Model | SD821 |
| Part Number | 3BSC610037R1 |
| Series | SD Digital Signal Conditioning & Processor |
| Product Type | Digital Signal Conditioner / Converter |
| Supported Input Types | Voltage, Current, Thermocouple, RTD |
| Output Format | Digitally conditioned signal for controllers |
| Signal Conversion | High‑resolution digital A/D conversion |
| Input Impedance | High input impedance (dependent on configuration) |
| Output Interface | Digital output compatible with PLC/DCS/DAQ |
| Galvanic Isolation | Full isolation between input and output |
| Accuracy | ±0.1 % of full scale (typical) |
| Response Time | < 100 ms |
| Supply Voltage | 24 V DC |
| Power Consumption | < 7 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 or Rack Mount |
| Connection Method | Screw / Plug‑in Terminals |
| Dimensions (W × H × D) | 45 × 120 × 110 mm |
| Weight (kg) | Approx. 0.45 kg |
4. Product Applications
The SD821 is specifically designed for industrial environments requiring precise digitized conversion of analog sensor signals before they are consumed by digital control systems.
Typical Application Scenarios
• Conversion of analog signals for distributed control systems (DCS).
• Digital conditioning for PLC input channels requiring accurate feedback.
• Temperature process loops using thermocouples and RTDs with digital linearization.
• Front‑end signal processing for data acquisition and historian systems.
• Noise filtering and precision scaling for industrial instrumentation.
• Integration of analog measurement sources into networked automation systems.
• Machine automation requiring robust analog‑to‑digital interfacing.
• Utility infrastructure and power generation monitoring applications.
In these scenarios, the SD821 ensures that controllers and monitoring systems receive clean, digitized signals with minimal noise and high stability, improving overall automation performance.
5. Product Advantages
Digital Processing for High Accuracy
The SD821 performs high‑resolution digital conversion, minimizing conversion error and enabling precise measurement scaling.
Flexible Input Compatibility
Supports a wide range of analog input types including voltage, current loops, thermocouples, and RTDs.
Galvanic Isolation Enhances Signal Integrity
Full isolation between input and output reduces electrical noise and prevents ground loop interference.
Output Designed for Digital Automation
Digitally conditioned signals are suitable for direct integration with PLCs, DCS machines, and data acquisition systems.
Programmable Filtering and Response
Internal digital processing offers configurable filtering and response characteristics for specific application needs.
Robust Industrial Construction
Built for continuous operation in industrial environments with wide temperature and humidity tolerance.
Compact Mounting Form Factor
DIN‑rail or rack mount design allows flexible installation in control cabinets and automation panels.
Efficient Installation and Maintenance
Screw and plug‑in terminal connections simplify field wiring and facilitate easy service.
6. Recommended Models from the Same Series or Related Devices
Below are five related digital and analog signal conditioning and processing modules from the SD, SC, or SB families or with similar functionalities.
| Model | Supported Inputs | Output Type | Supply Voltage | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| SD800 | Analog sensor inputs | Digital conditioned output | 24 V DC | 45×120×110 | 0.40 kg |
| SD810 | Voltage / Current | Digital output | 24 V DC | 45×120×110 | 0.41 kg |
| SD812 | Voltage / Current / Thermocouple / RTD | Digital conditioned output | 24 V DC | 45×120×110 | 0.42 kg |
| SD821 | Voltage / Current / Thermocouple / RTD | Digital conditioned output | 24 V DC | 45×120×110 | 0.45 kg |
| SC610 | Voltage / Current / Thermocouple / RTD | Analog outputs | 24 V DC | 35×100×110 | 0.32 kg |
7. Five Popular Industrial Automation Models from the Same Brand
Below are five widely used automation hardware modules that interface with digital signal conditioning devices like the SD821 in control 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 | Logic processing |
| CI870 | Communication Interface | 24 V DC | 120×150×90 | 0.8 kg | Fieldbus / 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 SD821?
A: The SD821 conditions and digitizes analog sensor signals for accurate use in digital automation systems.
Q2: What types of analog inputs does the model support?
A: It supports current, voltage, thermocouple, and RTD analog inputs.
Q3: What type of output does the SD821 provide?
A: It provides digitally conditioned signals for PLCs, DCS, or data acquisition modules.
Q4: What power supply does the unit require?
A: The module operates on a standard 24 V DC industrial supply.
Q5: How heavy is the SD821?
A: The unit weighs approximately 0.45 kg.
Q6: What are its physical dimensions?
A: Approximate dimensions are 45 × 120 × 110 mm.
Q7: Where is this product typically installed?
A: It is typically mounted on DIN rails or within modular racks in control cabinets.
Q8: Why is galvanic isolation important?
A: Galvanic isolation improves signal quality by reducing noise and preventing ground loop interference.
Q9: In what industries is the SD821 commonly used?
A: It is used in manufacturing, power utilities, process industries, and automation sectors.
Q10: Can it operate continuously in industrial environments?
A: Yes, it is designed for stable 24/7 operation under industrial operating conditions.