Introduction
The Yokogawa NFAP135-S00 Pulse Input Module is a high-speed industrial signal processing unit designed for STARDOM FCN/FCJ distributed control systems (DCS). It is used to acquire and process pulse signals from field devices such as flow meters, energy meters, counters, tachometers, and encoders, converting them into reliable digital data for automation and monitoring systems.
Built for precision and robustness, this module supports multiple input types and is optimized for stable operation in harsh industrial environments. Its design emphasizes high-speed counting, signal stability, and electrical isolation, making it suitable for continuous process industries and energy applications.
Technical Specifications
| Parameter | Specification |
|---|
| Model | NFAP135-S00 |
| Manufacturer | Yokogawa |
| Type | Pulse Input Module |
| Input Channels | 8 channels (individually isolated) |
| Input Frequency Range | 0 to 10 kHz (0.1 Hz in advanced applications) |
| Input Signals | Contact ON/OFF, voltage pulse, current pulse |
| Minimum Pulse Width | 40 μs |
| Data Refresh Cycle | 2 ms – 10 ms depending on mode |
| Signal Types Supported | 2-wire / 3-wire pulse input |
| Pull-up Resistance | 68 kΩ (12 V / 24 V DC) |
| Shunt Resistance | OFF / 200 Ω / 500 Ω / 1000 Ω selectable |
| Isolation Voltage | 500 V AC (input-to-system & channel-to-channel) |
| Transmitter Supply | 12 V DC or 24 V DC selectable |
| Power Consumption | 300 mA (5 V DC), 400 mA (24 V DC) |
| Input Filtering | Chattering noise suppression selectable |
| Operating Temperature | -20°C to +70°C |
| Storage Temperature | -40°C to +85°C |
| Weight | ~0.3–0.5 kg |
| Mounting Type | FCN/FCJ rack system module |
Applications
The NFAP135-S00 is widely used in industrial automation systems where accurate pulse measurement is essential.
Typical applications include:
-
Flow measurement systems (water, oil, gas)
-
Energy metering and power monitoring
-
Turbine and rotational speed measurement
-
Production counting and batch control systems
-
Compressor and pump performance monitoring
-
SCADA-based process automation
-
Renewable energy monitoring systems
-
Industrial instrumentation and telemetry systems
Its ability to handle high-speed pulse signals makes it especially valuable in energy and process industries.
Advantages
The Yokogawa NFAP135-S00 provides strong performance advantages in industrial environments:
-
8-channel isolated input design improves signal stability
-
High-speed 10 kHz processing capability supports dynamic applications
-
2 ms–10 ms fast refresh cycle enables real-time monitoring
-
Flexible pulse input support (contact, voltage, current)
-
Selectable filtering function reduces signal noise and chatter
-
Robust 500 V isolation design enhances system safety
-
Accurate pulse counting for energy and flow measurement
-
Seamless integration with Yokogawa STARDOM systems
Technical FAQs
1. What is the main function of the NFAP135-S00?
It processes and counts pulse signals from industrial field devices.
2. How many input channels does it support?
It supports 8 individually isolated pulse input channels.
3. What is the maximum input frequency?
Up to 10 kHz depending on configuration.
4. What types of signals are supported?
Contact ON/OFF, voltage pulse, and current pulse signals.
5. What is the minimum pulse width it can detect?
Approximately 40 microseconds.
6. Is the module isolated?
Yes, each channel is electrically isolated up to 500 V AC.
7. What is the data refresh speed?
Between 2 ms and 10 ms depending on mode.
8. Does it support field device power supply?
Yes, selectable 12 V or 24 V DC supply.
9. What is its main industrial use?
Flow, energy, and rotational measurement in automation systems.
10. What system is it compatible with?
Yokogawa STARDOM FCN/FCJ control platforms.
A DCS Q Co., Ltd. - PLC and DCS Industrial Control Equipment Wholesale
