Brand:Yokogawa Electric Item No.:NFAI135-S51 Product Origin:Japan Product Dimensions:130 x 107.5 x 32.8 mm Product Weight:0.2 kg Payment:T/T, Western Union, Credit Card Goods_stock:15 Shipping Port:Xiamen, China Lead Time:1-3 Days Condition:Brand New And Original Warranty:1 Year Certificate:COO
The Yokogawa NFAI135-S51 is an advanced pulse input module designed for precise frequency and pulse signal measurement in industrial automation systems. It plays a critical role in monitoring dynamic processes such as rotational speed, flow measurement, and energy tracking.
Built for integration with Yokogawa STARDOM FCN/FCJ platforms, it ensures stable and accurate data acquisition in both simple and complex control architectures.
Technical Specifications
Parameter
Specification
Product Model
NFAI135-S51
Product Type
Pulse / Frequency Input Module
System Platform
STARDOM FCN/FCJ
Number of Channels
8 isolated inputs
Input Signal Types
Voltage pulse / Open collector / Relay contact
Input Frequency Range
0.1 Hz – 10 kHz
Accuracy
±0.1% of reading
Data Refresh Cycle
10 ms
Step Response Time
100 ms
Input Current Limit
25 mA
Isolation
Channel-to-channel isolated
Power Supply
20.2 – 29.3 V DC (transmitter supply)
Operating Environment
Industrial automation systems
Dimensions (W × H × D)
130 × 107.5 × 32.8 mm
Weight
0.2 kg / 0.44 lb
Applications
The Yokogawa NFAI135-S51 pulse input module is designed for high-accuracy signal acquisition in industrial automation and control systems. It is widely used in environments where precise pulse or frequency measurement is required for monitoring and process control.
Typical applications include:
Rotational speed monitoring in turbines and motors
Flow meter pulse signal acquisition in process industries
Energy monitoring and metering systems
Conveyor speed detection in manufacturing automation
SCADA and STARDOM-based distributed control systems
Renewable energy systems such as wind power monitoring
It is especially effective in applications requiring stable measurement across both low-frequency and high-frequency pulse inputs.
Advantages
The NFAI135-S51 delivers high-precision pulse processing combined with strong industrial reliability, making it suitable for demanding control environments.
8 isolated input channels for independent signal processing
High-accuracy frequency measurement with 0.1% reading precision
Wide input frequency range from low-speed to high-speed signals
Strong electrical isolation improves noise resistance and system stability
Fast data refresh cycle enables real-time monitoring (10 ms)
Compatible with Yokogawa STARDOM FCN/FCJ architectures
Its design ensures stable performance even in electrically noisy industrial environments.
Technical FAQs (10 Technical Questions)
Q1: What is the main function of the NFAI135-S51 module?
It measures pulse and frequency signals from industrial field devices.
Q2: How many input channels does it support?
It provides 8 isolated input channels.
Q3: What types of signals can it handle?
Voltage pulse, open-collector, and relay contact inputs.
Q4: What is the measurement accuracy?
Approximately ±0.1% of full scale.
Q5: What is the input frequency range?
0.1 Hz to 10 kHz.
Q6: Is the module electrically isolated?
Yes, each channel is individually isolated.
Q7: What is the data refresh cycle?
Approximately 10 ms.
Q8: What system is it compatible with?
Yokogawa STARDOM FCN/FCJ control systems.
Q9: Can it be used for turbine monitoring?
Yes, it is commonly used for rotational speed measurement in turbines.
Q10: What improves its reliability in industrial environments?
Channel isolation and robust signal processing design reduce noise interference.
