Yokogawa NFAI543-S50/A4S00 Analog Input Module – Product Description

Overview

The Yokogawa NFAI543-S50/A4S00 is a high-performance analog input module designed for accurate process monitoring. It converts signals from field transmitters and sensors into digital data for use in CENTUM VP DCS or ProSafe‑RS SIS systems. Moreover, its compact rack-mounted design allows easy integration into industrial automation networks.

Technical Specifications

Electrical & I/O

• Number of Channels: 16 analog input channels

• Signal Types Supported: 4–20 mA DC (current), 1–5 V DC (voltage optional)

• Resolution: 16-bit A/D conversion

• Accuracy: ±0.1% of full scale

• Input Impedance: Current mode 250 Ω, Voltage mode ≥1 MΩ

• Isolation: Channel-to-channel and channel-to-system

• Power Supply: 24 V DC via system backplane

Performance

• Response Time: ≤10 ms per channel

• Noise Immunity: High resistance to electrical and electromagnetic interference

• Diagnostics: LED indicators for channel and module status, self-test, and fault detection

• Reliability: Designed for continuous 24/7 operation

Mechanical

• Mounting: Rack-mounted in Yokogawa backplane

• Dimensions (W × H × D): 130 × 130 × 32 mm

• Weight: 0.5 kg

• Cooling: Natural convection

• Protection: IP20

Communication & Integration

• Interface: Yokogawa ESB bus for CENTUM VP and ProSafe‑RS

• Compatibility: Fully compatible with CENTUM VP DCS and ProSafe‑RS SIS

• Configuration: Managed via Yokogawa engineering tools

Environmental & Compliance

• Operating Temperature: 0 °C to +55 °C

• Storage Temperature: −20 °C to +70 °C

• Relative Humidity: 5–95% non-condensing

• Certifications: CE, UL, CSA, IEC 61508 SIL2 compliant

• Origin: Manufactured in Japan

FAQ

Q1: How many input channels does the NFAI543 module provide?
It provides 16 isolated analog input channels for reliable measurement.

Q2: What signal types are supported?
Supports 4–20 mA current input and 1–5 V voltage input.

Q3: What is the module’s accuracy?
It offers ±0.1% of full-scale accuracy for precise measurements.

Q4: Is it compatible with Yokogawa SIS systems?
Yes, it fully integrates with ProSafe‑RS and CENTUM VP DCS systems.

Q5: What environmental conditions can it operate in?
It operates from 0 °C to +55 °C with 5–95% non-condensing humidity.