High-Speed Pulse Acquisition for Precise Industrial Measurement
The Yokogawa NFAP135-S50 Pulse Input Module is a high-reliability industrial input device designed to accurately capture and process pulse signals in advanced automation systems. It is widely used in distributed control systems (DCS) and process monitoring applications where precise frequency and pulse counting are essential for stable operation.
Engineered for Yokogawa’s modular control platforms, this module ensures accurate signal acquisition from field instruments such as flowmeters, encoders, and speed sensors, even in electrically noisy industrial environments.
Technical Specifications
| Parameter | Details |
|---|
| Model | NFAP135-S50 |
| Product Type | Pulse Input Module |
| Input Channels | 8 isolated channels |
| Input Signal Types | Contact ON/OFF, voltage pulse, current pulse |
| Input Frequency Range | 0 to 10 kHz |
| Minimum Pulse Width | 40 μs |
| Channel Isolation | Electrical isolation per channel |
| Signal Isolation | Input-to-system isolation supported |
| Transmitter Power Supply | Supported (12 V / 24 V selectable) |
| Signal Processing | Pulse counting, frequency measurement, totalizing |
| Data Refresh Cycle | 2 ms |
| System Compatibility | Yokogawa STARDOM / CENTUM / ProSafe-RS |
| Installation | Rack-mounted modular I/O system |
| Weight | Approx. 0.3 kg |
Application Areas
The NFAP135-S50 is widely used in industries requiring accurate pulse-based measurement and monitoring:
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Flow measurement systems (turbine and magnetic flowmeters)
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Motor speed and rotational monitoring
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Energy metering and power monitoring systems
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Industrial automation and process control
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Compressor and turbine monitoring applications
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Distributed control and data acquisition systems
Its high-speed input capability makes it especially suitable for dynamic and real-time measurement environments.
Key Advantages
The NFAP135-S50 delivers high-speed signal processing, strong channel isolation, and stable pulse measurement performance, ensuring reliable operation in complex industrial conditions. Each channel operates independently, reducing interference and improving measurement accuracy.
Its ability to handle multiple pulse signal types allows flexible integration with a wide range of field devices. The fast refresh cycle improves real-time responsiveness, making it ideal for precise monitoring and control applications.
The modular design also simplifies system integration and supports scalable automation architectures.
Technical FAQs
1. What is the main function of this module?
It collects and processes pulse signals for measurement and control systems.
2. How many channels does it support?
It provides 8 fully isolated input channels.
3. What types of signals can it handle?
Contact ON/OFF, voltage pulse, and current pulse signals.
4. What is the maximum input frequency?
Up to 10 kHz depending on system configuration.
5. Is channel isolation included?
Yes, each channel is electrically isolated.
6. What industries use it most?
Oil & gas, power generation, chemical processing, and automation industries.
7. Can it measure flow and speed signals?
Yes, it is commonly used for flowmeters and rotational speed sensors.
8. Does it support transmitter power supply?
Yes, selectable 12 V or 24 V supply for compatible devices.
9. What systems is it compatible with?
Yokogawa STARDOM, CENTUM, and ProSafe-RS platforms.
10. What is its main advantage?
High-speed, accurate pulse measurement with strong isolation and reliability.
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