Detailed Introduction to Yokogawa UR1A-400N-1KD-2P1-2/CE/CN/BK/Z
1. Product Description
The Yokogawa UR1A-400N-1KD-2P1-2/CE/CN/BK/Z is a rugged, high-performance circular chart recorder developed by Yokogawa Electric Corporation—a global leader in industrial automation and measurement solutions. Designed for continuous process monitoring in harsh industrial environments, this analog-digital hybrid recorder combines the reliability of traditional chart recording with modern data integration capabilities, making it an indispensable tool for tracking critical process parameters.
Tailored for industries requiring compliant, traceable data logging, the UR1A-400N excels in key scenarios:
- Petrochemical Plants: Monitors temperature, pressure, and flow rates in reaction vessels and pipelines, providing hard-copy records for regulatory compliance (e.g., ISO 9001, EPA standards);
- Power Generation: Tracks boiler steam pressure, turbine temperature, and generator output, enabling quick identification of abnormal fluctuations to prevent equipment damage;
- Pharmaceutical Manufacturing: Logs temperature and humidity in cleanrooms and sterilization chambers, ensuring compliance with GMP (Good Manufacturing Practices) and FDA requirements;
- Food Processing: Records pasteurization temperatures and cooling rates, maintaining product safety and quality consistency while supporting audit trails.
With its robust mechanical design, wide input compatibility, and compliance with global standards (CE, CN), the UR1A-400N delivers reliable performance in extreme conditions (e.g., high vibration, temperature swings) and seamlessly integrates with existing process control systems—bridging the gap between analog monitoring and digital data management.
2. Product Technical Specifications
The UR1A-400N’s specifications are optimized for industrial process monitoring, emphasizing accuracy, durability, and flexibility. Key parameters are organized into intuitive categories below:
2.1 Core Measurement Capabilities
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Parameter
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Specification
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Input Channels
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4 universal input channels (configurable per channel)
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Input Types Supported
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Thermocouples (J, K, T, E, R, S, B, N), RTDs (Pt100, Cu50), DC voltage (0-10V), DC current (4-20mA, 0-20mA)
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Measurement Accuracy
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±0.1% FS (for DC voltage/current); ±0.2% FS (for thermocouples/RTDs)
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Resolution
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16-bit ADC (analog-to-digital conversion)
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Sampling Rate
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1 sample/second per channel (continuous recording)
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Chart Speed
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10 selectable speeds: 0.25, 0.5, 1, 2, 4, 8, 12, 24, 48, 96 mm/hour
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Chart Type
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Circular paper chart (diameter: 250 mm); compatible with Yokogawa UR series chart paper (e.g., UR-250-001)
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2.2 Electrical & Power Specifications
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Parameter
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Specification
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Power Supply
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AC 100-240V ±10%, 50/60Hz; Power consumption: ≤30VA
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Input Impedance
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≥10 MΩ (for voltage inputs); 250 Ω (for 4-20mA current inputs)
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Isolation
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Channel-to-channel: ≥500V AC (1 minute); Input-to-power: ≥1000V AC (1 minute)
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Output Signals
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2 alarm relay outputs (NO/NC configurable); Contact rating: 250V AC/3A, 30V DC/3A
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Communication Interface
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RS-485 (Modbus RTU protocol); Optional Ethernet (Modbus TCP) via expansion module
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2.3 Mechanical & Environmental Ratings
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Parameter
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Specification
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Enclosure Type
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Panel-mounted, dust-tight design
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Protection Level
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IP54 (front panel); IP20 (rear terminal block)
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Operating Temperature
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0°C to +50°C (ambient); Storage temperature: -20°C to +60°C
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Relative Humidity
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10% to 90% (non-condensing)
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Vibration Resistance
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10-55 Hz, 0.3 mm double amplitude (IEC 60068-2-6)
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Shock Resistance
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100 m/s² (11ms duration, IEC 60068-2-27)
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Physical Dimensions
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Diameter: 280 mm; Depth: 180 mm; Weight: ~3.5 kg
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2.4 Compliance & Certifications
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Parameter
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Specification
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Safety Certifications
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CE (EN 61010-1), UL/CSA 61010-1, CN (GB 4793.1)
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EMC Compliance
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EN 61326-1 (industrial immunity), EN 55011 (emission)
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Environmental Compliance
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RoHS compliant (restriction of hazardous substances)
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3. System Introduction
The Yokogawa UR1A-400N-1KD-2P1-2/CE/CN/BK/Z serves as a critical “data anchor” in industrial process monitoring systems, integrating with sensors, controllers, and data management platforms to provide continuous, traceable records. Below is its role in a typical industrial system:
3.1 System Architecture
A complete monitoring system with the UR1A-400N includes three key layers, designed for seamless data flow and reliability:
- Sensing Layer:
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- Field sensors (thermocouples, RTDs, pressure transmitters) measure process parameters (temperature, pressure, flow) and send analog signals (4-20mA, 0-10V) to the UR1A-400N’s input channels. For example, a Pt100 RTD in a chemical reactor sends temperature data to Channel 1 of the recorder.
- Recording & Processing Layer:
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- The UR1A-400N processes incoming signals via a 16-bit ADC, converts them to readable values, and records them simultaneously on two media:
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- Analog Chart: Prints data on a circular paper chart (e.g., 24-hour or 7-day cycles) with clear scaling and time stamps, providing an immediate visual reference and hard-copy audit trail.
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- Digital Storage: Logs data to internal memory (up to 10,000 data points) or an external USB drive (via optional port), enabling digital export for analysis.
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- Alarm functionality: Triggers relay outputs when parameters exceed user-defined thresholds (e.g., high temperature in a boiler), activating audible/visual alerts or shutting down non-critical processes.
- Data Integration Layer:
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- The UR1A-400N connects to a central control system (e.g., DCS, SCADA) via RS-485 (Modbus RTU) or optional Ethernet. This allows remote monitoring of recorded data, configuration of recording parameters (e.g., chart speed, alarm limits), and synchronization with digital data management platforms (e.g., Yokogawa Exaquantum).
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- For compliance-focused industries (pharmaceuticals, food processing), digital data can be exported as CSV or PDF files, signed with timestamps to meet regulatory requirements.
3.2 System Advantages
- Dual Recording Redundancy: Analog chart + digital storage ensures data integrity—critical for industries where data loss could lead to non-compliance or safety risks.
- Wide Input Compatibility: Universal input channels eliminate the need for signal converters, reducing system complexity and cost when monitoring multiple parameter types.
- Rugged Reliability: IP54 protection, vibration resistance, and wide temperature range make the UR1A-400N suitable for harsh industrial environments (e.g., refineries, power plants) where delicate electronics often fail.
- Compliance Readiness: Pre-certified to global standards (CE, CN, GMP) and support for audit trails simplifies regulatory compliance, reducing the burden of documentation for quality teams.
- Ease of Integration: Modbus protocol compatibility allows seamless connection to existing control systems, while the panel-mounted design simplifies retrofitting into legacy setups.
3.3 Typical Application Example: Chemical Reactor Monitoring
In a batch chemical reactor system, the UR1A-400N plays a pivotal role in ensuring process safety and product quality:
- Sensing: Thermocouples (Channel 1) measure reactor temperature (0-300°C), pressure transmitters (Channel 2) send 4-20mA signals for internal pressure (0-10 bar), and flow meters (Channel 3) monitor reagent feed rate (0-50 L/h).
- Recording: The recorder prints real-time data on a 24-hour circular chart (speed: 1 mm/hour) and logs digital data to a USB drive. Operators can visually inspect the chart for temperature/pressure spikes, while digital data is exported to a QA system for batch traceability.
- Alarming: If temperature exceeds 320°C or pressure exceeds 12 bar, the UR1A-400N triggers a relay output, activating a factory alarm and sending a signal to the DCS to pause reagent feeding.
- Integration: The DCS remotely accesses recorded data via Modbus RTU, allowing engineers to analyze batch trends and optimize reaction parameters for efficiency.
4. Key Features & User Benefits
- Intuitive Operation: Large, easy-to-read display and membrane keypad simplify configuration of input types, chart speeds, and alarm limits—no specialized training required for basic operation.
- Long-Term Reliability: Yokogawa’s proven mechanical chart drive system ensures consistent recording accuracy (±0.1% FS) with minimal maintenance (annual calibration recommended).
- Flexible Chart Options: Circular charts in multiple time scales (24-hour to 7-day) adapt to different process cycle lengths, reducing paper waste and replacement frequency.
- Expandable Functionality: Optional Ethernet module adds remote monitoring and data export via web browser, while USB connectivity enables quick data transfer to PCs for analysis.
Conclusion
The Yokogawa UR1A-400N-1KD-2P1-2/CE/CN/BK/Z is a trusted workhorse for industrial process monitoring, combining the best of analog reliability and digital flexibility. Its robust design, wide input compatibility, and compliance-focused features make it ideal for industries where traceable, accurate data is non-negotiable—from petrochemicals and power generation to pharmaceuticals and food processing. By integrating seamlessly with existing systems and simplifying regulatory compliance, the UR1A-400N helps businesses improve process safety, reduce downtime, and maintain the highest standards of quality control.
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