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Yokogawa NFDV557‑SS2
- Product Name: Digital Output Module for CENTUM VP DCS System
- Product Series: NFDV Series Yokogawa DCS System I/O Modules
- Product Introduction: Industrial‑grade isolated digital output module specially designed for Yokogawa CENTUM VP/CENTUM CS3000 distributed control system, used for on‑site equipment switch control and signal output.
Detailed content
- Technical Specifications:
- Number of Output Channels: 16 isolated digital output channels
- Output Type: Current‑sink transistor output
- Output Voltage: 24 V DC; max load current 100 mA per channel
- Field Power Supply: 20.4–26.4 V DC
- Isolation Performance: 2000 V AC isolation between output signal and system backplane; 500 V AC isolation between common terminals
- Leakage Current: ≤ 0.1 mA when output is OFF
- Response Time: ≤ 1 ms switching speed
- Operating Temperature: ‑20–60 °C; storage temperature ‑40–85 °C
- Function Features: Optocoupler electrical isolation design; short‑circuit and over‑current protection per channel; real‑time channel status LED indication; hot‑swappable modular design; compatible with Yokogawa DCS system bus protocol.
- Performance Parameters: Channel isolation withstand voltage 2000 V AC; output ON‑state voltage drop ≤ 2 V DC; long‑term stable operation MTBF > 1,000,000 hours.
- Material Composition: High‑strength industrial PCB; copper alloy pressure‑clamp terminals; flame‑retardant ABS housing; optocoupler isolation chips; industrial‑grade transistor power devices.
- Structural Characteristics: Standard DCS rack‑mount modular structure; pressure‑clamp wiring terminals for reliable connection; front‑panel status indicator lights; compact space‑saving layout.
- Working Principle: Receive digital control signals from DCS system CPU module, drive on‑site solenoid valves, relays, alarm devices and other actuators via transistor switch output, with optocoupler isolation between module internal circuit and on‑site field circuit.
- Advantage Highlights: High‑density multi‑channel output; strong electrical isolation anti‑interference performance; fast switching response; high‑reliability industrial‑grade design; convenient maintenance and replacement.
- Applicable Industries: Petrochemical, power plant, metallurgy, pharmaceutical, water treatment, oil & gas, chemical process industrial automation control systems.
- Installation Requirements: Installed in Yokogawa standard DCS control rack; ensure good ventilation and heat dissipation; ambient temperature 0–55 °C; avoid strong electromagnetic interference.
- Usage Precautions: Strictly control per‑channel load current within rated range; correctly connect field power supply polarity; regularly inspect terminal tightness; avoid dust accumulation inside module housing.
