• Technical Specifications:
  • Input Signal: Thermocouple, RTD, DC voltage, DC current
  • Display: 4‑digit LED digital display
  • Power Supply: 100‑240 VAC, 50/60 Hz
  • Control Output: Relay output, voltage pulse output
  • Mounting Size: 48 × 48 mm panel cutout
  • Communication: RS‑485 (Modbus‑RTU)
• Functional Features: On‑site parameter configuration, high‑speed sampling, auto‑zero calibration, alarm output function, PID control logic
• Performance Parameters: Sampling rate = 100 ms, measurement accuracy = ±0.1% FS, operating temperature = 0–50 °C
• Material Composition: ABS plastic housing, metal front panel, silicone rubber sealing gasket
• Structural Characteristics: Square compact panel structure, front‑panel keypad operation, rear‑terminal wiring terminals
• Working Principle: Converts analog process signals to digital signals via internal ADC chip, compares with set values, outputs control signals via built‑in PID algorithm
• Advantage Highlights: Small footprint, high measurement stability, easy wiring, anti‑interference circuit design, wide input compatibility
• Applicable Industries: Chemical industry, food processing, pharmaceutical manufacturing, water treatment, HVAC systems, machinery manufacturing
• Model Series: UM33A compact indicator controller series
• Installation Requirements: Panel mounting, dust‑proof and ventilation environment, avoid strong electromagnetic interference sources
• Usage Precautions: Do not overload input terminals; maintain ambient humidity 20–80% non‑condensing; regular calibration every 12 months

2. Yokogawa NFDV161‑P51

• Product Name: Fieldbus Interface Module, NFDV Series
• Product Brief: Yokogawa DCS system‑compatible PROFIBUS‑DP fieldbus interface module, used for data communication between field devices and distributed control systems.
• Technical Specifications:
  • Bus Protocol: PROFIBUS‑DP V0/V1
  • Communication Rate: 9.6 kbit/s–12 Mbit/s auto‑adaptive
  • Power Consumption: ≤8 W
  • Operating Voltage: 24 VDC ±10%
  • Isolation: Galvanic isolation between bus side and system side
• Functional Features: Real‑time data transmission, fault diagnosis, bus monitoring, redundant communication support, hot‑swap capability
• Performance Parameters: Communication accuracy = 100% protocol compliance, operating temperature = 0–60 °C, MTBF > 500,000 hours
• Material Composition: Industrial‑grade PCB, aluminum alloy heat‑dissipating shell, flame‑retardant plastic connectors
• Structural Characteristics: DIN‑rail mount modular structure, plug‑and‑play terminal design, front‑panel status indicator LEDs
• Working Principle: Converts DCS internal parallel data to PROFIBUS‑DP serial bus signals, realizes bidirectional real‑time data exchange between control system and field instruments
• Advantage Highlights: High‑speed bus communication, strong anti‑interference performance, seamless integration with Yokogawa CENTUM DCS series, easy maintenance
• Applicable Industries: Petroleum refining, petrochemical, power generation, metallurgy, pulp & paper, large‑scale process industrial automation
• Model Series: NFDV fieldbus communication module series
• Installation Requirements: DIN‑rail mounting in control cabinet, maintain good ventilation, separate power and signal wiring
• Usage Precautions: Use shielded PROFIBUS cables only; strictly follow bus terminal resistance configuration; avoid static electricity during installation