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- Yokogawa
- NFDV551
- Digital Output Module
- Japan
- 32.8 × 107.5 × 130 mm
- 0.2 kg
- Xiamen, China
- New & In Stock
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All our products are priced very favorably because we have our own warehouse and supply.
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Product Overview
The Yokogawa NFDV551 is a Digital Output Module designed for Yokogawa industrial automation and distributed control systems (DCS). It converts digital control commands from the controller into output signals used to operate field devices such as relays, contactors, solenoid valves, indicator lamps, alarms, and other discrete actuators.
The NFDV551 provides reliable and fast digital output performance, making it suitable for continuous industrial process control applications. Its compact modular design allows easy installation and seamless integration into Yokogawa control systems.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Yokogawa |
| Model | NFDV551 |
| Product Type | Digital Output Module |
| Output Type | Digital Output |
| Signal Type | Discrete ON/OFF Output |
| Output Function | Field device control |
| Isolation | Electrical isolation between controller and output circuits |
| Mounting Method | Rack-mounted |
| System Compatibility | Yokogawa Distributed Control System (DCS) |
| Protection Rating | IP20 |
| Dimensions | 32.8 × 107.5 × 130 mm |
| Weight | 0.2 kg |
Function and Working Principle
The NFDV551 receives digital output commands from the controller CPU and converts them into discrete ON/OFF electrical signals for controlling external equipment.
When the controller executes the application program, the module energizes or de-energizes its output channels according to the programmed logic, allowing connected field devices to operate automatically.
Operating Sequence
- The controller executes the control program.
- Digital output commands are sent to the NFDV551.
- The module switches the appropriate output channels.
- Connected field devices receive the output signals.
- The controlled equipment performs the required operation.
Key Features
- High-reliability digital output module
- Fast ON/OFF output switching
- Electrical isolation for improved system protection
- Compact modular construction
- Stable operation in industrial environments
- Easy installation and maintenance
- Seamless integration with Yokogawa automation systems
- Suitable for continuous industrial operation
System Role
The NFDV551 functions as the digital output interface between the Yokogawa controller and field equipment, enabling automatic control of discrete industrial devices.
Typical System Architecture
CPU Module → NFDV551 Digital Output Module → Relays / Solenoid Valves / Contactors / Indicator Lamps → Process Equipment
Industrial Applications
The NFDV551 is widely used in:
- Oil and gas facilities
- Chemical and petrochemical plants
- Power generation systems
- Water and wastewater treatment
- Manufacturing automation
- Pulp and paper mills
- Pharmaceutical production
- Food and beverage processing
- Building automation
- General industrial process control
Installation Guidelines
- Install the module in the designated Yokogawa system rack.
- Verify proper backplane connection before powering the system.
- Connect field output wiring according to system specifications.
- Confirm load ratings are within module specifications.
- Perform functional testing before commissioning.
- Inspect output circuits periodically during maintenance.
Compatible Components
The NFDV551 is compatible with:
- Yokogawa Autonomous Controller CPU Modules
- Yokogawa Controller Base Units
- Yokogawa Digital Input Modules
- Yokogawa Analog Input Modules
- Yokogawa Analog Output Modules
- Yokogawa Communication Modules
- Yokogawa Distributed Control Systems
- Yokogawa Engineering Workstations
Alternative Models
| Model | Description |
|---|---|
| NFDO541 | Digital Output Module |
| NFDR541 | Relay Output Module |
| NFDV151 | Digital Input Module |
| NFAI543 | Analog Output Module |
| NFCP501 | Autonomous Controller CPU Module |
Advantages
- Reliable digital output control
- Fast response for discrete control applications
- Electrical isolation for enhanced protection
- Stable operation in demanding industrial environments
- Compact and modular design
- Easy integration into Yokogawa automation systems
- Long service life
- Simplified maintenance and replacement
Frequently Asked Questions
What is the NFDV551 used for?
It is used to provide digital ON/OFF output signals for controlling industrial field devices such as relays, contactors, solenoid valves, and indicator lamps.
What type of outputs does the module provide?
The module provides discrete digital output signals for industrial automation applications.
Does the module provide electrical isolation?
Yes. It provides electrical isolation between the controller and field output circuits to improve system reliability.
How is the module installed?
The NFDV551 is installed in a compatible Yokogawa control system rack and communicates with the controller through the system backplane.
Which industries commonly use the NFDV551?
It is widely used in oil and gas, chemical processing, power generation, water treatment, manufacturing, pharmaceuticals, food processing, and other industrial automation applications.
Conclusion
The Yokogawa NFDV551 Digital Output Module is a dependable interface module designed for discrete output control in industrial automation systems. With its fast digital switching capability, electrical isolation, compact modular design, and seamless integration with Yokogawa distributed control systems, it provides reliable operation for controlling a wide range of industrial field devices in continuous process applications.