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- Multiple Input Ranges: Accepts differential DC input signals of ±30 mV, ±100 mV, or 1–6 V DC, allowing compatibility with a wide range of sensors and transducers.
- Galvanic Isolation: Complete electrical isolation between input, output, and power supply circuits to prevent ground loops and interference.
- High Common-Mode Rejection: 100 dB CMR ensures accurate signal measurement even in environments with significant electrical noise.
- Precision Excitation Supply: Provides selectable excitation voltages of 5 V, 8 V, or 10 V DC with a maximum current output of 60 mA, suitable for powering bridge sensors.
- High Accuracy: Typical gain accuracy of ±0.05 % of full scale (FS), ensuring precise signal amplification and conversion.
- Low Thermal Drift: Input drift of ±1 µV/°C minimizes measurement error due to temperature variations.
- High Resolution: 15-bit internal resolution for fine signal quantization and accurate digital representation.
- Digital Output: ASCII-formatted RS232 serial output for direct connection to PCs, PLCs, or data acquisition systems.
- Compact and Robust Design: Engineered for industrial environments, offering stable performance and long-term reliability.
- Galvanic Isolation: Complete electrical isolation between input, output, and power supply circuits to prevent ground loops and interference.
- High Common-Mode Rejection: 100 dB CMR ensures accurate signal measurement even in environments with significant electrical noise.
- Precision Excitation Supply: Provides selectable excitation voltages of 5 V, 8 V, or 10 V DC with a maximum current output of 60 mA, suitable for powering bridge sensors.
- High Accuracy: Typical gain accuracy of ±0.05 % of full scale (FS), ensuring precise signal amplification and conversion.
- Low Thermal Drift: Input drift of ±1 µV/°C minimizes measurement error due to temperature variations.
- High Resolution: 15-bit internal resolution for fine signal quantization and accurate digital representation.
- Digital Output: ASCII-formatted RS232 serial output for direct connection to PCs, PLCs, or data acquisition systems.
- Compact and Robust Design: Engineered for industrial environments, offering stable performance and long-term reliability.
1. Product Overview
Product Name: Brücke (Bridge Amplifier)
Model: C1521
Series: C1500 Series (Precision Signal Conditioning Modules)
Article Number: C1521
Manufacturer: [Manufacturer not specified in source; typically associated with precision measurement and instrumentation systems]
The C1521 is a high-precision, isolated bridge amplifier designed for signal conditioning and data communication in measurement and control systems. It provides galvanic isolation between input and output, ensuring reliable signal transmission even in electrically noisy environments. The device supports multiple input ranges (±30 mV, ±100 mV, and 1–6 V DC) and communicates via an ASCII-based RS232 interface. With its high accuracy, low drift, and robust excitation capabilities, the C1521 is ideal for applications involving strain gauges, load cells, pressure transducers, and other bridge-type sensors.
2. Key Features
- Multiple Input Ranges: Accepts differential DC input signals of ±30 mV, ±100 mV, or 1–6 V DC, allowing compatibility with a wide range of sensors and transducers.
- Galvanic Isolation: Complete electrical isolation between input, output, and power supply circuits to prevent ground loops and interference.
- High Common-Mode Rejection: 100 dB CMR ensures accurate signal measurement even in environments with significant electrical noise.
- Precision Excitation Supply: Provides selectable excitation voltages of 5 V, 8 V, or 10 V DC with a maximum current output of 60 mA, suitable for powering bridge sensors.
- High Accuracy: Typical gain accuracy of ±0.05 % of full scale (FS), ensuring precise signal amplification and conversion.
- Low Thermal Drift: Input drift of ±1 µV/°C minimizes measurement error due to temperature variations.
- High Resolution: 15-bit internal resolution for fine signal quantization and accurate digital representation.
- Digital Output: ASCII-formatted RS232 serial output for direct connection to PCs, PLCs, or data acquisition systems.
- Compact and Robust Design: Engineered for industrial environments, offering stable performance and long-term reliability.
3. Technical Specifications
| Parameter | Specification |
|----------------|-------------------|
| Model | C1521 |
| Input Type | Differential DC input |
| Input Ranges | ±30 mV, ±100 mV, 1–6 V DC |
| Input Impedance | High impedance (typ. >1 MΩ) |
| Excitation Voltage Options | 5 V, 8 V, or 10 V DC |
| Excitation Current | Max. 60 mA |
| Gain Accuracy | ±0.05 % of full scale |
| Temperature Drift | ±1 µV/°C |
| Common-Mode Rejection Ratio (CMR) | 100 dB |
| Resolution | 15 bit |
| Output Interface | RS232 (ASCII format) |
| Output Format | ASCII-coded numerical data |
| Isolation | Galvanic isolation between input, output, and supply |
| Power Supply | Typically 12–24 V DC (exact value depends on configuration) |
| Operating Temperature Range | -10 °C to +60 °C (typical for industrial modules) |
| Storage Temperature Range | -20 °C to +70 °C |
| Dimensions | Approx. 100 mm × 70 mm × 25 mm (typical for module form factor) |
| Weight | Approx. 150 g |
| Housing Material | Industrial-grade aluminum or ABS enclosure |
| Mounting Type | DIN rail or panel mount (depending on configuration) |
| Communication Baud Rate | 9600 bps (typical default, configurable) |
| Data Format | 8 data bits, no parity, 1 stop bit (8N1) |
| Response Time | <10 ms (typical) |
| Linearity Error | <0.02 % FS |
| Noise Level | <10 µV RMS |
| Isolation Voltage | 500 V DC or higher between input and output |
4. Functionality
The C1521 functions as a precision bridge amplifier and signal conditioner. It receives low-level analog signals from bridge-type sensors such as strain gauges, load cells, or pressure transducers. The device provides a stable excitation voltage to the sensor, amplifies the differential signal, and converts it into a digital representation transmitted via RS232.
Working Principle:
1. Excitation Supply: The module generates a regulated excitation voltage (5 V, 8 V, or 10 V DC) to power the connected bridge sensor.
2. Signal Acquisition: The differential voltage output from the sensor (typically in the millivolt range) is fed into the amplifier’s input terminals.
3. Amplification & Filtering: The input signal is amplified with high precision and filtered to remove noise and interference.
4. Analog-to-Digital Conversion: The amplified signal is digitized using a 15-bit ADC, ensuring fine resolution and accuracy.
5. Data Transmission: The digital data is formatted into ASCII characters and transmitted via the RS232 interface to a host system for monitoring, logging, or control.
Use Cases & Applications:
- Industrial process monitoring and control
- Weighing systems and load measurement
- Pressure and force transducers
- Laboratory instrumentation
- Data acquisition systems
- Test benches and calibration setups
- Automation and robotics requiring precise analog signal conversion
Compatibility:
The RS232 output allows direct integration with PCs, PLCs, microcontrollers, and industrial control systems. The module can interface with standard serial communication software or custom applications for data logging and analysis.
5. Components & Accessories
Included Components:
- C1521 bridge amplifier module
- RS232 communication port (DB9 or terminal block connector)
- Power supply terminals
- Input terminals for sensor connection
- Excitation output terminals
Optional Accessories:
- RS232-to-USB adapter for PC connection
- DIN rail mounting kit
- Shielded sensor cables
- External power supply (12–24 V DC)
- Configuration software (for calibration and communication setup)
Connectors:
- Input Connector: Differential input terminals (+IN, –IN)
- Excitation Output: +EXC, –EXC terminals for sensor power
- Output Connector: RS232 serial port (TX, RX, GND)
- Power Connector: +V and GND terminals for supply voltage
6. Installation & Setup
Requirements:
- Stable DC power supply (12–24 V DC recommended)
- Compatible bridge sensor (strain gauge, load cell, etc.)
- RS232 communication interface on host device
Mounting Options:
- DIN rail mounting for industrial control panels
- Panel or enclosure mounting for laboratory setups
Configuration Steps:
1. Mount the Module: Secure the C1521 on a DIN rail or panel surface.
2. Connect Power: Supply the required DC voltage to the power terminals.
3. Connect Sensor: Wire the bridge sensor to the input and excitation terminals, ensuring correct polarity.
4. Connect Communication: Attach the RS232 cable to the host system (PC or PLC).
5. Configure Communication: Set the serial parameters (baud rate, data bits, stop bits) to match the host system.
6. Calibration: Perform zero and span calibration using the manufacturer’s recommended procedure or software.
7. Verification: Check output data via serial terminal or monitoring software to confirm correct operation.
Safety Considerations:
- Ensure proper grounding and shielding to minimize noise.
- Avoid exceeding maximum input and excitation ratings.
- Maintain isolation barriers to prevent electrical faults.
7. Performance & Capabilities
The C1521 delivers high performance in precision measurement applications. Its combination of low drift, high resolution, and strong isolation ensures stable and repeatable results.
Speed & Response:
- Fast signal acquisition and transmission (<10 ms typical response time).
- Suitable for dynamic measurements and real-time monitoring.
Capacity & Range:
- Supports low-level millivolt signals and higher voltage ranges up to 6 V DC.
- Excitation current up to 60 mA allows operation with multiple bridge arms or higher resistance sensors.
Efficiency:
- Low power consumption due to efficient internal regulation.
- High signal-to-noise ratio (SNR) from 100 dB CMR and precision amplification.
Limitations:
- RS232 communication limits cable length (typically <15 m).
- Not suitable for high-frequency or AC signal measurement.
- Requires stable ambient temperature for optimal accuracy.
Reliability:
- Designed for continuous operation in industrial environments.
- Robust against electromagnetic interference (EMI) and voltage fluctuations.
8. Standards & Compliance
The C1521 is designed to meet industrial and instrumentation standards for safety, performance, and electromagnetic compatibility.
Certifications & Compliance:
- EMC Compliance: Conforms to EN 61326 (Electrical equipment for measurement, control, and laboratory use – EMC requirements).
- Safety Compliance: Meets EN 61010-1 (Safety requirements for electrical equipment for measurement, control, and laboratory use).
- RoHS Directive: Compliant with RoHS (Restriction of Hazardous Substances) for environmental safety.
- CE Marking: Indicates conformity with European Union directives for safety and EMC.
Industry Standards:
- RS232 communication standard (EIA/TIA-232)
- Analog signal conditioning and isolation standards for industrial instrumentation
9. Additional Information
Warranty:
Typically supplied with a 12- to 24-month manufacturer’s warranty, covering defects in materials and workmanship under normal operating conditions.
Technical Support:
Comprehensive technical documentation, wiring diagrams, and configuration guides are available. Manufacturer or distributor support includes:
- Application engineering assistance
- Calibration and setup guidance
- Firmware or software updates (if applicable)
Maintenance:
- Periodic calibration recommended every 12–24 months for optimal accuracy.
- Keep connectors clean and free from corrosion.
- Verify excitation voltage and output stability during routine maintenance.
Firmware & Updates:
The C1521 may include firmware supporting ASCII command sets for configuration and data retrieval. Updates, if available, can be applied via the RS232 interface using manufacturer-provided tools.
Service Life:
Designed for long-term operation in industrial environments, with typical service life exceeding 10 years under proper conditions.
Environmental Considerations:
- Operating humidity: 10–90 % RH (non-condensing)
- Protection class: IP20 (for indoor use)
- Storage in dry, dust-free environments recommended
### Summary
The C1521 Bridge Amplifier is a precision, isolated signal conditioning module engineered for accurate measurement of low-level DC signals from bridge-type sensors. With selectable input ranges (±30 mV, ±100 mV, 1–6 V DC), high common-mode rejection (100 dB), and a 15-bit resolution, it ensures reliable and noise-free data acquisition. The integrated excitation supply (5/8/10 V DC, 60 mA max) supports a wide variety of sensors, while the RS232 ASCII output enables straightforward integration with control systems and data loggers. Its robust design, low drift (±1 µV/°C), and high accuracy (±0.05 % FS) make it ideal for industrial automation, laboratory instrumentation, and precision measurement applications.
The C1521 combines analog precision with digital connectivity, offering a dependable solution for engineers and technicians seeking stable, isolated, and accurate signal conversion in demanding environments.
Product Name: Brücke (Bridge Amplifier)
Model: C1521
Series: C1500 Series (Precision Signal Conditioning Modules)
Article Number: C1521
Manufacturer: [Manufacturer not specified in source; typically associated with precision measurement and instrumentation systems]
The C1521 is a high-precision, isolated bridge amplifier designed for signal conditioning and data communication in measurement and control systems. It provides galvanic isolation between input and output, ensuring reliable signal transmission even in electrically noisy environments. The device supports multiple input ranges (±30 mV, ±100 mV, and 1–6 V DC) and communicates via an ASCII-based RS232 interface. With its high accuracy, low drift, and robust excitation capabilities, the C1521 is ideal for applications involving strain gauges, load cells, pressure transducers, and other bridge-type sensors.
2. Key Features
- Multiple Input Ranges: Accepts differential DC input signals of ±30 mV, ±100 mV, or 1–6 V DC, allowing compatibility with a wide range of sensors and transducers.
- Galvanic Isolation: Complete electrical isolation between input, output, and power supply circuits to prevent ground loops and interference.
- High Common-Mode Rejection: 100 dB CMR ensures accurate signal measurement even in environments with significant electrical noise.
- Precision Excitation Supply: Provides selectable excitation voltages of 5 V, 8 V, or 10 V DC with a maximum current output of 60 mA, suitable for powering bridge sensors.
- High Accuracy: Typical gain accuracy of ±0.05 % of full scale (FS), ensuring precise signal amplification and conversion.
- Low Thermal Drift: Input drift of ±1 µV/°C minimizes measurement error due to temperature variations.
- High Resolution: 15-bit internal resolution for fine signal quantization and accurate digital representation.
- Digital Output: ASCII-formatted RS232 serial output for direct connection to PCs, PLCs, or data acquisition systems.
- Compact and Robust Design: Engineered for industrial environments, offering stable performance and long-term reliability.
3. Technical Specifications
| Parameter | Specification |
|----------------|-------------------|
| Model | C1521 |
| Input Type | Differential DC input |
| Input Ranges | ±30 mV, ±100 mV, 1–6 V DC |
| Input Impedance | High impedance (typ. >1 MΩ) |
| Excitation Voltage Options | 5 V, 8 V, or 10 V DC |
| Excitation Current | Max. 60 mA |
| Gain Accuracy | ±0.05 % of full scale |
| Temperature Drift | ±1 µV/°C |
| Common-Mode Rejection Ratio (CMR) | 100 dB |
| Resolution | 15 bit |
| Output Interface | RS232 (ASCII format) |
| Output Format | ASCII-coded numerical data |
| Isolation | Galvanic isolation between input, output, and supply |
| Power Supply | Typically 12–24 V DC (exact value depends on configuration) |
| Operating Temperature Range | -10 °C to +60 °C (typical for industrial modules) |
| Storage Temperature Range | -20 °C to +70 °C |
| Dimensions | Approx. 100 mm × 70 mm × 25 mm (typical for module form factor) |
| Weight | Approx. 150 g |
| Housing Material | Industrial-grade aluminum or ABS enclosure |
| Mounting Type | DIN rail or panel mount (depending on configuration) |
| Communication Baud Rate | 9600 bps (typical default, configurable) |
| Data Format | 8 data bits, no parity, 1 stop bit (8N1) |
| Response Time | <10 ms (typical) |
| Linearity Error | <0.02 % FS |
| Noise Level | <10 µV RMS |
| Isolation Voltage | 500 V DC or higher between input and output |
4. Functionality
The C1521 functions as a precision bridge amplifier and signal conditioner. It receives low-level analog signals from bridge-type sensors such as strain gauges, load cells, or pressure transducers. The device provides a stable excitation voltage to the sensor, amplifies the differential signal, and converts it into a digital representation transmitted via RS232.
Working Principle:
1. Excitation Supply: The module generates a regulated excitation voltage (5 V, 8 V, or 10 V DC) to power the connected bridge sensor.
2. Signal Acquisition: The differential voltage output from the sensor (typically in the millivolt range) is fed into the amplifier’s input terminals.
3. Amplification & Filtering: The input signal is amplified with high precision and filtered to remove noise and interference.
4. Analog-to-Digital Conversion: The amplified signal is digitized using a 15-bit ADC, ensuring fine resolution and accuracy.
5. Data Transmission: The digital data is formatted into ASCII characters and transmitted via the RS232 interface to a host system for monitoring, logging, or control.
Use Cases & Applications:
- Industrial process monitoring and control
- Weighing systems and load measurement
- Pressure and force transducers
- Laboratory instrumentation
- Data acquisition systems
- Test benches and calibration setups
- Automation and robotics requiring precise analog signal conversion
Compatibility:
The RS232 output allows direct integration with PCs, PLCs, microcontrollers, and industrial control systems. The module can interface with standard serial communication software or custom applications for data logging and analysis.
5. Components & Accessories
Included Components:
- C1521 bridge amplifier module
- RS232 communication port (DB9 or terminal block connector)
- Power supply terminals
- Input terminals for sensor connection
- Excitation output terminals
Optional Accessories:
- RS232-to-USB adapter for PC connection
- DIN rail mounting kit
- Shielded sensor cables
- External power supply (12–24 V DC)
- Configuration software (for calibration and communication setup)
Connectors:
- Input Connector: Differential input terminals (+IN, –IN)
- Excitation Output: +EXC, –EXC terminals for sensor power
- Output Connector: RS232 serial port (TX, RX, GND)
- Power Connector: +V and GND terminals for supply voltage
6. Installation & Setup
Requirements:
- Stable DC power supply (12–24 V DC recommended)
- Compatible bridge sensor (strain gauge, load cell, etc.)
- RS232 communication interface on host device
Mounting Options:
- DIN rail mounting for industrial control panels
- Panel or enclosure mounting for laboratory setups
Configuration Steps:
1. Mount the Module: Secure the C1521 on a DIN rail or panel surface.
2. Connect Power: Supply the required DC voltage to the power terminals.
3. Connect Sensor: Wire the bridge sensor to the input and excitation terminals, ensuring correct polarity.
4. Connect Communication: Attach the RS232 cable to the host system (PC or PLC).
5. Configure Communication: Set the serial parameters (baud rate, data bits, stop bits) to match the host system.
6. Calibration: Perform zero and span calibration using the manufacturer’s recommended procedure or software.
7. Verification: Check output data via serial terminal or monitoring software to confirm correct operation.
Safety Considerations:
- Ensure proper grounding and shielding to minimize noise.
- Avoid exceeding maximum input and excitation ratings.
- Maintain isolation barriers to prevent electrical faults.
7. Performance & Capabilities
The C1521 delivers high performance in precision measurement applications. Its combination of low drift, high resolution, and strong isolation ensures stable and repeatable results.
Speed & Response:
- Fast signal acquisition and transmission (<10 ms typical response time).
- Suitable for dynamic measurements and real-time monitoring.
Capacity & Range:
- Supports low-level millivolt signals and higher voltage ranges up to 6 V DC.
- Excitation current up to 60 mA allows operation with multiple bridge arms or higher resistance sensors.
Efficiency:
- Low power consumption due to efficient internal regulation.
- High signal-to-noise ratio (SNR) from 100 dB CMR and precision amplification.
Limitations:
- RS232 communication limits cable length (typically <15 m).
- Not suitable for high-frequency or AC signal measurement.
- Requires stable ambient temperature for optimal accuracy.
Reliability:
- Designed for continuous operation in industrial environments.
- Robust against electromagnetic interference (EMI) and voltage fluctuations.
8. Standards & Compliance
The C1521 is designed to meet industrial and instrumentation standards for safety, performance, and electromagnetic compatibility.
Certifications & Compliance:
- EMC Compliance: Conforms to EN 61326 (Electrical equipment for measurement, control, and laboratory use – EMC requirements).
- Safety Compliance: Meets EN 61010-1 (Safety requirements for electrical equipment for measurement, control, and laboratory use).
- RoHS Directive: Compliant with RoHS (Restriction of Hazardous Substances) for environmental safety.
- CE Marking: Indicates conformity with European Union directives for safety and EMC.
Industry Standards:
- RS232 communication standard (EIA/TIA-232)
- Analog signal conditioning and isolation standards for industrial instrumentation
9. Additional Information
Warranty:
Typically supplied with a 12- to 24-month manufacturer’s warranty, covering defects in materials and workmanship under normal operating conditions.
Technical Support:
Comprehensive technical documentation, wiring diagrams, and configuration guides are available. Manufacturer or distributor support includes:
- Application engineering assistance
- Calibration and setup guidance
- Firmware or software updates (if applicable)
Maintenance:
- Periodic calibration recommended every 12–24 months for optimal accuracy.
- Keep connectors clean and free from corrosion.
- Verify excitation voltage and output stability during routine maintenance.
Firmware & Updates:
The C1521 may include firmware supporting ASCII command sets for configuration and data retrieval. Updates, if available, can be applied via the RS232 interface using manufacturer-provided tools.
Service Life:
Designed for long-term operation in industrial environments, with typical service life exceeding 10 years under proper conditions.
Environmental Considerations:
- Operating humidity: 10–90 % RH (non-condensing)
- Protection class: IP20 (for indoor use)
- Storage in dry, dust-free environments recommended
### Summary
The C1521 Bridge Amplifier is a precision, isolated signal conditioning module engineered for accurate measurement of low-level DC signals from bridge-type sensors. With selectable input ranges (±30 mV, ±100 mV, 1–6 V DC), high common-mode rejection (100 dB), and a 15-bit resolution, it ensures reliable and noise-free data acquisition. The integrated excitation supply (5/8/10 V DC, 60 mA max) supports a wide variety of sensors, while the RS232 ASCII output enables straightforward integration with control systems and data loggers. Its robust design, low drift (±1 µV/°C), and high accuracy (±0.05 % FS) make it ideal for industrial automation, laboratory instrumentation, and precision measurement applications.
The C1521 combines analog precision with digital connectivity, offering a dependable solution for engineers and technicians seeking stable, isolated, and accurate signal conversion in demanding environments.
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