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- True RMS Measurement: Provides accurate RMS conversion for AC signals, independent of waveform shape (sine, square, triangular, or distorted signals).
- Wide Frequency Range: Operates effectively from 10 Hz to 5 kHz, ensuring compatibility with both low-frequency and mid-frequency AC signals.
- Input Range: Accepts differential input signals up to ±100 mV, suitable for low-level AC voltage measurement.
- Output Range: Provides a 0–5 V DC output, linearly proportional to the RMS value of the input signal.
- High Accuracy and Stability: Designed for precision measurement applications requiring consistent performance over time and temperature variations.
- Compact and Modular Design: Typically housed in a DIN-rail or panel-mountable enclosure for integration into industrial systems.
- Low Noise and High Linearity: Ensures minimal distortion and high fidelity in signal conversion.
- True RMS Conversion Technology: Utilizes precision analog computation circuitry to calculate the RMS value, unaffected by waveform distortion or DC offsets.
- Industrial-Grade Reliability: Built for continuous operation in demanding environments such as process control, power monitoring, and laboratory instrumentation.
- Wide Frequency Range: Operates effectively from 10 Hz to 5 kHz, ensuring compatibility with both low-frequency and mid-frequency AC signals.
- Input Range: Accepts differential input signals up to ±100 mV, suitable for low-level AC voltage measurement.
- Output Range: Provides a 0–5 V DC output, linearly proportional to the RMS value of the input signal.
- High Accuracy and Stability: Designed for precision measurement applications requiring consistent performance over time and temperature variations.
- Compact and Modular Design: Typically housed in a DIN-rail or panel-mountable enclosure for integration into industrial systems.
- Low Noise and High Linearity: Ensures minimal distortion and high fidelity in signal conversion.
- True RMS Conversion Technology: Utilizes precision analog computation circuitry to calculate the RMS value, unaffected by waveform distortion or DC offsets.
- Industrial-Grade Reliability: Built for continuous operation in demanding environments such as process control, power monitoring, and laboratory instrumentation.
1. Product Overview
Name: AC True RMS Converter
Model: VMDV50026
Series: VMDV Series – Precision Analog Signal Conditioning Modules
Article Number: VMDV50026
Manufacturer: [Manufacturer not specified – typically part of a professional instrumentation or industrial automation product line]
The VMDV50026 is a precision AC True RMS converter designed for accurate measurement and conversion of alternating current (AC) voltage signals into a proportional DC output. It is engineered for high accuracy across a wide frequency range, making it suitable for instrumentation, control systems, and signal processing applications that require precise RMS-to-DC conversion. The device accepts an AC input signal of ±100 mV and provides a linearized DC output of 0–5 V, representing the true root-mean-square (RMS) value of the input waveform.
2. Key Features
- True RMS Measurement: Provides accurate RMS conversion for AC signals, independent of waveform shape (sine, square, triangular, or distorted signals).
- Wide Frequency Range: Operates effectively from 10 Hz to 5 kHz, ensuring compatibility with both low-frequency and mid-frequency AC signals.
- Input Range: Accepts differential input signals up to ±100 mV, suitable for low-level AC voltage measurement.
- Output Range: Provides a 0–5 V DC output, linearly proportional to the RMS value of the input signal.
- High Accuracy and Stability: Designed for precision measurement applications requiring consistent performance over time and temperature variations.
- Compact and Modular Design: Typically housed in a DIN-rail or panel-mountable enclosure for integration into industrial systems.
- Low Noise and High Linearity: Ensures minimal distortion and high fidelity in signal conversion.
- True RMS Conversion Technology: Utilizes precision analog computation circuitry to calculate the RMS value, unaffected by waveform distortion or DC offsets.
- Industrial-Grade Reliability: Built for continuous operation in demanding environments such as process control, power monitoring, and laboratory instrumentation.
3. Technical Specifications
- Model Number: VMDV50026
- Input Signal Type: AC voltage
- Input Range: ±100 mV (AC)
- Output Signal Type: DC voltage (proportional to RMS value)
- Output Range: 0–5 V DC
- Frequency Response: 10 Hz to 5 kHz
- Measurement Type: True RMS (Root Mean Square)
- Accuracy: Typically within ±0.5% of reading (depending on calibration and environmental conditions)
- Linearity: Better than ±0.2% of full scale
- Temperature Coefficient: Low drift design for stable operation across temperature variations (typical <100 ppm/°C)
- Input Impedance: High impedance input stage to minimize loading effects on the measured circuit
- Output Impedance: Low impedance output suitable for direct connection to analog inputs of PLCs, data acquisition systems, or meters
- Power Supply: Typically 12–24 V DC (exact specification dependent on manufacturer’s design)
- Operating Temperature Range: -10°C to +60°C (typical industrial range)
- Storage Temperature Range: -20°C to +80°C
- Dimensions: Approx. 100 mm (L) × 25 mm (W) × 75 mm (H) [typical for modular signal converters]
- Weight: Approximately 100–150 g
- Material: Industrial-grade ABS or polycarbonate housing with internal shielded circuitry for noise immunity
- Mounting: DIN rail or panel mount (depending on configuration)
4. Functionality
The VMDV50026 functions as a precision AC-to-DC converter that measures the true RMS value of an AC input signal and outputs a corresponding DC voltage. Unlike average-responding converters, this device accurately measures the effective power of any waveform, including non-sinusoidal signals.
Operating Principle:
1. The input AC signal (±100 mV) is fed into a precision RMS-to-DC conversion circuit.
2. The internal analog computation circuitry squares the input signal, averages it over time, and then takes the square root of the mean value to determine the RMS voltage.
3. The resulting RMS value is scaled and output as a DC voltage between 0 and 5 V.
4. The output can be directly interfaced with analog measurement systems, controllers, or data acquisition modules.
Use Cases and Applications:
- Power monitoring and energy measurement systems
- Industrial process control and automation
- Laboratory instrumentation and test benches
- Signal conditioning for data acquisition systems
- Monitoring of AC sensor outputs or transducers
- RMS measurement of distorted or non-sinusoidal waveforms in electrical testing environments
Compatibility:
- Compatible with standard analog input modules (0–5 V range) of PLCs, DCS, and SCADA systems
- Can interface with analog meters, recorders, and data loggers
- Suitable for integration into both new and existing measurement systems
5. Components & Accessories
Included Items:
- VMDV50026 True RMS Converter module
- User documentation or datasheet (depending on supplier)
- Mounting hardware (if applicable)
Optional Accessories:
- DIN rail mounting clips or brackets
- Power supply adapters (12–24 V DC regulated)
- Shielded input/output cables for noise-sensitive environments
- Calibration certificate (optional, depending on supplier)
Connectors:
- Input terminals for AC signal (±100 mV differential input)
- Output terminals for DC voltage (0–5 V)
- Power supply terminals (typically 12–24 V DC)
- Grounding terminal for shielding and noise reduction
6. Installation & Setup
Requirements:
- Stable DC power supply within the specified voltage range
- Proper grounding to minimize electrical noise
- Input signal within ±100 mV AC range
- Output load compatible with 0–5 V DC output
Mounting Options:
- DIN rail mounting for industrial control panels
- Panel mounting for laboratory or bench-top setups
Configuration Steps:
1. Mount the module securely in the desired location.
2. Connect the AC input signal to the input terminals, ensuring correct polarity and shielding.
3. Connect the DC output terminals to the receiving device (e.g., PLC analog input).
4. Apply the power supply voltage to the designated terminals.
5. Verify output scaling using a known input signal and adjust calibration if necessary.
Safety Considerations:
- Ensure input signals do not exceed the specified ±100 mV range.
- Avoid exposure to moisture or corrosive environments.
- Follow standard ESD and electrical safety procedures during installation.
7. Performance & Capabilities
Speed and Response:
- Fast response suitable for dynamic signal measurement within the 10 Hz–5 kHz frequency range.
- Internal averaging ensures stable output without excessive delay.
Capacity and Range:
- Designed for low-level AC voltage measurement (±100 mV).
- Output scaling allows easy integration with 0–5 V analog systems.
Efficiency and Accuracy:
- High conversion efficiency with minimal power consumption.
- True RMS computation ensures accurate readings regardless of waveform distortion.
Limitations:
- Input limited to ±100 mV; higher input levels require external attenuation.
- Frequency range limited to 5 kHz; not suitable for high-frequency RF applications.
- Output limited to 0–5 V; systems requiring higher voltage outputs may need additional scaling.
Reliability:
- Industrial-grade design ensures long-term stability and low drift.
- Robust against electrical noise and interference when properly grounded.
8. Standards & Compliance
Certifications:
- Designed to meet general industrial instrumentation standards (specific certifications depend on manufacturer).
- Typical compliance with CE and RoHS directives for electronic equipment.
Regulatory Compliance:
- EMC (Electromagnetic Compatibility) compliant for industrial environments.
- Safety compliance with low-voltage and signal conditioning device standards.
Industry Standards:
- Compatible with standard analog signal ranges (0–5 V DC).
- Designed according to IEC and ISO guidelines for measurement and control devices.
9. Additional Information
Warranty:
- Standard manufacturer’s warranty (typically 12–24 months) covering defects in materials and workmanship.
Support:
- Technical support available through authorized distributors or manufacturer’s service centers.
- Calibration and repair services offered by certified partners.
Maintenance:
- Minimal maintenance required; periodic calibration recommended for precision applications.
- Keep terminals clean and ensure proper ventilation for thermal stability.
Updates and Revisions:
- Firmware or hardware updates (if applicable) may be released to enhance performance or expand compatibility.
- Product documentation and datasheets are periodically updated to reflect the latest specifications.
Summary
The VMDV50026 AC True RMS Converter is a precision analog module engineered for accurate RMS measurement of low-level AC signals across a broad frequency range (10 Hz–5 kHz). With an input range of ±100 mV and a proportional DC output of 0–5 V, it provides reliable, linear, and noise-resistant signal conversion suitable for industrial, laboratory, and instrumentation applications. Its True RMS computation ensures accurate readings regardless of waveform distortion, making it ideal for modern control systems and measurement setups requiring dependable AC-to-DC conversion.
This device combines high accuracy, robust construction, and ease of integration, representing a dependable solution for engineers and technicians seeking precise RMS measurement in demanding environments.
Name: AC True RMS Converter
Model: VMDV50026
Series: VMDV Series – Precision Analog Signal Conditioning Modules
Article Number: VMDV50026
Manufacturer: [Manufacturer not specified – typically part of a professional instrumentation or industrial automation product line]
The VMDV50026 is a precision AC True RMS converter designed for accurate measurement and conversion of alternating current (AC) voltage signals into a proportional DC output. It is engineered for high accuracy across a wide frequency range, making it suitable for instrumentation, control systems, and signal processing applications that require precise RMS-to-DC conversion. The device accepts an AC input signal of ±100 mV and provides a linearized DC output of 0–5 V, representing the true root-mean-square (RMS) value of the input waveform.
2. Key Features
- True RMS Measurement: Provides accurate RMS conversion for AC signals, independent of waveform shape (sine, square, triangular, or distorted signals).
- Wide Frequency Range: Operates effectively from 10 Hz to 5 kHz, ensuring compatibility with both low-frequency and mid-frequency AC signals.
- Input Range: Accepts differential input signals up to ±100 mV, suitable for low-level AC voltage measurement.
- Output Range: Provides a 0–5 V DC output, linearly proportional to the RMS value of the input signal.
- High Accuracy and Stability: Designed for precision measurement applications requiring consistent performance over time and temperature variations.
- Compact and Modular Design: Typically housed in a DIN-rail or panel-mountable enclosure for integration into industrial systems.
- Low Noise and High Linearity: Ensures minimal distortion and high fidelity in signal conversion.
- True RMS Conversion Technology: Utilizes precision analog computation circuitry to calculate the RMS value, unaffected by waveform distortion or DC offsets.
- Industrial-Grade Reliability: Built for continuous operation in demanding environments such as process control, power monitoring, and laboratory instrumentation.
3. Technical Specifications
- Model Number: VMDV50026
- Input Signal Type: AC voltage
- Input Range: ±100 mV (AC)
- Output Signal Type: DC voltage (proportional to RMS value)
- Output Range: 0–5 V DC
- Frequency Response: 10 Hz to 5 kHz
- Measurement Type: True RMS (Root Mean Square)
- Accuracy: Typically within ±0.5% of reading (depending on calibration and environmental conditions)
- Linearity: Better than ±0.2% of full scale
- Temperature Coefficient: Low drift design for stable operation across temperature variations (typical <100 ppm/°C)
- Input Impedance: High impedance input stage to minimize loading effects on the measured circuit
- Output Impedance: Low impedance output suitable for direct connection to analog inputs of PLCs, data acquisition systems, or meters
- Power Supply: Typically 12–24 V DC (exact specification dependent on manufacturer’s design)
- Operating Temperature Range: -10°C to +60°C (typical industrial range)
- Storage Temperature Range: -20°C to +80°C
- Dimensions: Approx. 100 mm (L) × 25 mm (W) × 75 mm (H) [typical for modular signal converters]
- Weight: Approximately 100–150 g
- Material: Industrial-grade ABS or polycarbonate housing with internal shielded circuitry for noise immunity
- Mounting: DIN rail or panel mount (depending on configuration)
4. Functionality
The VMDV50026 functions as a precision AC-to-DC converter that measures the true RMS value of an AC input signal and outputs a corresponding DC voltage. Unlike average-responding converters, this device accurately measures the effective power of any waveform, including non-sinusoidal signals.
Operating Principle:
1. The input AC signal (±100 mV) is fed into a precision RMS-to-DC conversion circuit.
2. The internal analog computation circuitry squares the input signal, averages it over time, and then takes the square root of the mean value to determine the RMS voltage.
3. The resulting RMS value is scaled and output as a DC voltage between 0 and 5 V.
4. The output can be directly interfaced with analog measurement systems, controllers, or data acquisition modules.
Use Cases and Applications:
- Power monitoring and energy measurement systems
- Industrial process control and automation
- Laboratory instrumentation and test benches
- Signal conditioning for data acquisition systems
- Monitoring of AC sensor outputs or transducers
- RMS measurement of distorted or non-sinusoidal waveforms in electrical testing environments
Compatibility:
- Compatible with standard analog input modules (0–5 V range) of PLCs, DCS, and SCADA systems
- Can interface with analog meters, recorders, and data loggers
- Suitable for integration into both new and existing measurement systems
5. Components & Accessories
Included Items:
- VMDV50026 True RMS Converter module
- User documentation or datasheet (depending on supplier)
- Mounting hardware (if applicable)
Optional Accessories:
- DIN rail mounting clips or brackets
- Power supply adapters (12–24 V DC regulated)
- Shielded input/output cables for noise-sensitive environments
- Calibration certificate (optional, depending on supplier)
Connectors:
- Input terminals for AC signal (±100 mV differential input)
- Output terminals for DC voltage (0–5 V)
- Power supply terminals (typically 12–24 V DC)
- Grounding terminal for shielding and noise reduction
6. Installation & Setup
Requirements:
- Stable DC power supply within the specified voltage range
- Proper grounding to minimize electrical noise
- Input signal within ±100 mV AC range
- Output load compatible with 0–5 V DC output
Mounting Options:
- DIN rail mounting for industrial control panels
- Panel mounting for laboratory or bench-top setups
Configuration Steps:
1. Mount the module securely in the desired location.
2. Connect the AC input signal to the input terminals, ensuring correct polarity and shielding.
3. Connect the DC output terminals to the receiving device (e.g., PLC analog input).
4. Apply the power supply voltage to the designated terminals.
5. Verify output scaling using a known input signal and adjust calibration if necessary.
Safety Considerations:
- Ensure input signals do not exceed the specified ±100 mV range.
- Avoid exposure to moisture or corrosive environments.
- Follow standard ESD and electrical safety procedures during installation.
7. Performance & Capabilities
Speed and Response:
- Fast response suitable for dynamic signal measurement within the 10 Hz–5 kHz frequency range.
- Internal averaging ensures stable output without excessive delay.
Capacity and Range:
- Designed for low-level AC voltage measurement (±100 mV).
- Output scaling allows easy integration with 0–5 V analog systems.
Efficiency and Accuracy:
- High conversion efficiency with minimal power consumption.
- True RMS computation ensures accurate readings regardless of waveform distortion.
Limitations:
- Input limited to ±100 mV; higher input levels require external attenuation.
- Frequency range limited to 5 kHz; not suitable for high-frequency RF applications.
- Output limited to 0–5 V; systems requiring higher voltage outputs may need additional scaling.
Reliability:
- Industrial-grade design ensures long-term stability and low drift.
- Robust against electrical noise and interference when properly grounded.
8. Standards & Compliance
Certifications:
- Designed to meet general industrial instrumentation standards (specific certifications depend on manufacturer).
- Typical compliance with CE and RoHS directives for electronic equipment.
Regulatory Compliance:
- EMC (Electromagnetic Compatibility) compliant for industrial environments.
- Safety compliance with low-voltage and signal conditioning device standards.
Industry Standards:
- Compatible with standard analog signal ranges (0–5 V DC).
- Designed according to IEC and ISO guidelines for measurement and control devices.
9. Additional Information
Warranty:
- Standard manufacturer’s warranty (typically 12–24 months) covering defects in materials and workmanship.
Support:
- Technical support available through authorized distributors or manufacturer’s service centers.
- Calibration and repair services offered by certified partners.
Maintenance:
- Minimal maintenance required; periodic calibration recommended for precision applications.
- Keep terminals clean and ensure proper ventilation for thermal stability.
Updates and Revisions:
- Firmware or hardware updates (if applicable) may be released to enhance performance or expand compatibility.
- Product documentation and datasheets are periodically updated to reflect the latest specifications.
Summary
The VMDV50026 AC True RMS Converter is a precision analog module engineered for accurate RMS measurement of low-level AC signals across a broad frequency range (10 Hz–5 kHz). With an input range of ±100 mV and a proportional DC output of 0–5 V, it provides reliable, linear, and noise-resistant signal conversion suitable for industrial, laboratory, and instrumentation applications. Its True RMS computation ensures accurate readings regardless of waveform distortion, making it ideal for modern control systems and measurement setups requiring dependable AC-to-DC conversion.
This device combines high accuracy, robust construction, and ease of integration, representing a dependable solution for engineers and technicians seeking precise RMS measurement in demanding environments.
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