Excellent PLC
| Company Information | ||||||||
| [email protected] | ||||||||
| Mobile | +8613666033393 | |||||||
| +8613666033393 | ||||||||
| 13666033393 | ||||||||
| Add | Room 1004, No. 62 Xiangxiu Li, Siming District, Xiamen City, Fujian Province, China | |||||||
Product Introduction
The Yokogawa NFAI835-S51 Input Module is a high-performance analog input module designed for use in CENTUM series distributed control systems. It provides precise signal conversion and robust processing capabilities, supporting a wide range of industrial analog inputs including temperature, pressure, and flow measurements. This module ensures high accuracy and stability, making it suitable for critical process control applications.
Technical Specifications
| Parameter | Specification |
|---|---|
| Input Type | Analog (Thermocouple, RTD, DC voltage/current) |
| Input Channels | 8 channels |
| Signal Accuracy | ±0.1% full scale |
| Conversion Method | Delta-sigma A/D converter |
| Response Time | 100 ms typical |
| Isolation | 2500 Vrms between input and system bus |
| Power Supply | 24 V DC ±10% |
| Communication Interface | Backplane bus interface |
| Operating Temperature | 0–55°C |
| Storage Temperature | -20–70°C |
| Dimensions | 32.8 × 107.5 × 130 mm |
| Weight | 0.3 kg |
Product Applications
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Chemical and petrochemical plants for temperature and pressure monitoring
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Power generation plants for monitoring boiler, turbine, and auxiliary system parameters
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Pharmaceutical and food processing industries for precise environmental control
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Water and wastewater treatment for flow and chemical dosing control
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Refining and oil & gas applications for real-time process data acquisition
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General industrial automation requiring analog signal integration
Product Advantages
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High Accuracy: Supports precise analog input with minimal measurement error.
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Multi-Input Support: Handles multiple input types including thermocouples, RTDs, and standard voltage/current signals.
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Fast Response: Rapid data conversion ensures real-time process monitoring.
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Robust Isolation: Protects the system from electrical noise and transients.
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Compact Design: Small footprint allows efficient rack installation.
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Seamless Integration: Fully compatible with Yokogawa CENTUM series systems.
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Reliable Operation: Designed for continuous operation in harsh industrial environments.
FAQ
Q1: What types of analog inputs does the NFAI835-S51 support?
A1: It supports thermocouples, RTDs, and DC voltage/current inputs.
Q2: What is the maximum input channel count for this module?
A2: The module provides 8 analog input channels.
Q3: How fast can the module convert analog signals to digital data?
A3: The typical response time is 100 ms per channel.
Q4: Does the module provide electrical isolation between inputs and system bus?
A4: Yes, it provides 2500 Vrms isolation between the input circuits and the system bus.
Q5: Can it operate in high-temperature environments?
A5: It is rated for 0–55°C operating temperature.
Q6: Is the module compatible with the CENTUM VP system?
A6: Yes, it is fully compatible with CENTUM VP and earlier CENTUM systems.
Q7: What is the accuracy of signal conversion?
A7: The module provides ±0.1% full-scale accuracy.
Q8: Can it handle both DC current and voltage signals simultaneously?
A8: Yes, it can handle multiple types of analog signals, including DC voltage and current.
Q9: How is the module powered?
A9: It requires a 24 V DC power supply with ±10% tolerance.
Q10: Can the module be replaced while the system is running?
A10: Hot-swap capability depends on the specific system configuration; typically, NFAI835-S51 is installed in a powered rack with proper handling to maintain system integrity.
Related or Same-Series Models
| Model Number | Description |
|---|---|
| NFAI831-S51 | 4-channel analog input module |
| NFAI832-S51 | 8-channel analog input module |
| NFAI833-S51 | Temperature input module |
| NFAI834-S51 | High-speed analog input module |
| NFAI836-S51 | Redundant analog input module |
| NFAI837-S51 | Multi-function analog input module |
Popular Yokogawa Models
| Model Number | Description |
|---|---|
| NFAI835-S51 | 8-channel analog input module |
| NFDX111-S01 | Digital input module |
| NFDR541-P50 | Relay output module |
| NFLC121-S00 | Serial communication module |
| NFLR121-SE0 | Redundant serial module |
| NFSB100-S51 | Bus repeat module |
| NFAI834-S51 | High-speed analog input module |
| NFAI836-S51 | Redundant analog input module |
