Editorial Technical Reference

Data Acquisition Unit (DAU)

This page explains how Data Acquisition Unit (DAU) is classified within Computer, Electronic and Optical Product Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

A hardware component that collects, digitizes, and transmits sensor data from the environment.

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Data Acquisition Unit (DAU) in a manufacturing environment
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Product Specifications

Technical details and manufacturing context for Data Acquisition Unit (DAU)

Definition
The Data Acquisition Unit (DAU) is a critical component within an Environmental Monitoring System. It serves as the primary interface between physical sensors (e.g., for temperature, humidity, air quality, pressure) and the system's data processing or control unit. Its role is to continuously or periodically sample analog signals from these sensors, convert them into digital data, perform initial signal conditioning (like filtering or amplification), and transmit this formatted data to a central controller, data logger, or network for further analysis, storage, and visualization. The DAU is designed for industrial environments, with an operating temperature range of -40 to 85 °C and a storage range of -40 to 105 °C, per IEC 60068-2-1/2. It supports a humidity range of 5–95% RH (non-condensing) per IEC 60068-2-78 and offers an ingress protection rating of IP54–IP65 per IEC 60529. It typically features 8–32 input channels, a sampling rate of 1–1000 Hz, an input voltage range of 0–10 V, and an ADC resolution of 16–24 bits, with an accuracy of ±0.1% FS. The unit operates on a supply voltage of 9–36 V DC and consumes 2–10 W. Communication interfaces include RS-485, CAN, and Ethernet, referencing ISO 11898 and IEEE 802.3. The DAU weighs 0.5–2.0 kg and has dimensions of 100x50x150 mm (W x H x D). It is housed in a metal or plastic enclosure and contains a printed circuit board with electronic components. These specifications are reference ranges; verify model-specific values with the manufacturer.
Working Principle
The DAU connects to various analog sensors via input channels. It uses an analog-to-digital converter (ADC) to sample continuous voltage or current signals at a defined rate. Internal circuitry provides signal conditioning, such as amplification, filtering, and isolation. A microcontroller or dedicated logic manages acquisition timing, formats digital data into packets, and handles communication protocols (e.g., RS-485, Ethernet, Modbus, 4-20mA) to relay data upstream. It is typically powered externally and may include local data buffering.
Common Materials
Printed Circuit Board (PCB), Electronic Components (ICs, resistors, capacitors), Metal or Plastic Enclosure
Technical Parameters
ParameterTypical rangeNotes & selection driver
Number of Input Channels8–32 channelsSelect based on sensor count; more channels increase cost.
Sampling Rate1–1000 HzHigher rates for dynamic signals; memory and bandwidth trade-off.
Input Voltage Range0–10 VTypical for analog sensors; ensure compatibility.
ADC Resolution16–24 bitHigher resolution improves measurement precision.
Accuracy±0.1 % FSFull-scale accuracy; lower is better.
Operating Temperature-40–85 °CExceeding range may cause drift or failure.IEC 60068-2-1/2
Storage Temperature-40–105 °CNon-operational; avoid prolonged exposure.IEC 60068-2-1/2
Humidity Range5–95 % RHNon-condensing; condensation may cause short circuits.IEC 60068-2-78
Ingress Protection RatingIP54–IP65Higher IP for dusty or wet environments.IEC 60529
Supply Voltage9–36 V DCWide input range for industrial power rails.
Power Consumption2–10 WLower power for battery-operated systems.
Communication InterfaceRS-485, CAN, EthernetChoose based on network topology and speed.ISO 11898, IEEE 802.3
Weight0.5–2.0 kgAffects mounting and portability.
Dimensions (W x H x D)100x50x150 mmCheck enclosure space and mounting holes.

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM
  • Analog Input Module
    Conditions (amplifies, filters, isolates) and digitizes incoming analog sensor signals.
    Material: PCB with integrated circuits (op-amps, ADCs)
  • Microcontroller / Processor
    Manages the timing of data acquisition, formats digital data, and controls communication interfaces.
    Material: Integrated Circuit (IC)
  • Communication Interface
    Provides the physical and protocol layer for transmitting acquired data to a central system (e.g., RS-485 transceiver, Ethernet PHY).
    Material: PCB with communication ICs and connectors
  • Power Supply Unit
    Converts external power input to the stable voltage levels required by the DAU's internal electronics.
    Material: PCB with voltage regulators, capacitors
  • Enclosure
    Protects internal electronic components from environmental factors like dust, moisture, and physical damage.
    Material: Plastic (e.g., ABS) or Metal (e.g., aluminum)

Application & selection

Application Fit & Sizing Matrix

Operational Limits
pressure: 0 to 100 psi
resolution: 24-bit ADC
input range: ±10V differential
temperature: -40°C to +85°C
sampling rate: Up to 100 kHz per channel
Media Compatibility
✓ Industrial process fluids (water, oils, coolants) ✓ Ambient air/gas monitoring ✓ Clean electrical signals from sensors
Unsuitable: Direct immersion in corrosive chemicals or abrasive slurries without protective housing
Sizing Data Required
  • Number of sensor channels required
  • Maximum sampling frequency needed
  • Input signal voltage/current range

Risk, maintenance & compliance

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Sensor Signal Degradation
Cause: Environmental contamination (dust, moisture, chemical exposure) compromising sensor connections or internal circuitry, leading to inaccurate or intermittent data readings.
Power Supply Failure
Cause: Voltage spikes, unstable power sources, or overheating due to inadequate ventilation, causing component damage or complete unit shutdown.
Maintenance Indicators
  • Inconsistent or erratic data readings from connected sensors
  • Unusual audible buzzing/humming or visible overheating of the unit casing
Engineering Tips
  • Implement regular environmental sealing checks and maintain clean, stable operating conditions (controlled temperature/humidity) to prevent contamination and thermal stress.
  • Install surge protection devices and ensure proper power conditioning, along with scheduled thermal imaging inspections to detect early overheating issues.

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
IEC 61010-1:2010 - Safety requirements for electrical equipment EN 61326-1:2013 - EMC requirements for electrical equipment

Quoted from the published standard.

Manufacturing Precision
  • Enclosure dimensions: +/- 0.5mm
  • Mounting hole alignment: +/- 0.2mm
Quality Inspection
  • Environmental stress screening (temperature/humidity cycling)
  • Signal integrity verification (noise/interference testing)
Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
Check the legal entity, factory address, ownership, certifications, and direct contacts.

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Manufacturers of Data Acquisition Unit (DAU)

1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Xiamen Chenmai Wisdom Technology Co., Ltd.
Xiamen, Fujian, CN
Also makes: Remote Terminal Unit, Liquid Level Gauge, Control System and 5 more
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Remote Terminal Unit (RTU) M21F-V60X”
View source page ↗ chenmaiwise.com · recorded 2026-09-17
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Frequently Asked Questions

What is the typical number of input channels for a DAU?

The DAU typically offers 8 to 32 input channels, depending on the model. The number of channels should be selected based on the sensor count required for your application; more channels increase cost.

What communication interfaces are available on the DAU?

The DAU supports RS-485, CAN, and Ethernet interfaces, referencing standards ISO 11898 and IEEE 802.3. The choice depends on network topology and speed requirements.

What is the operating temperature range of the DAU?

The DAU operates in a temperature range of -40 to 85 °C, with a storage range of -40 to 105 °C, per IEC 60068-2-1/2. Exceeding these ranges may cause drift or failure.

What is the accuracy of the DAU?

The DAU has a full-scale accuracy of ±0.1% FS. Lower values indicate better measurement precision. Verify the specific accuracy for your model with the manufacturer.

Data basis: editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Related equipment

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Environmental Monitoring System
View system integration details

Industrial Ecosystem & Supply Chain Structure

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Data Acquisition Unit (DAU).

DAQ Unit Data Logger Remote Terminal Unit (RTU)

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review · Page last updated 13 October 2026

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