Description
The YOKOGAWA NFAI543-S01 S1 Analog Output Module is a 16-channel isolated analog output module designed for Yokogawa industrial automation and controller platforms. It provides 4 to 20 mA DC analog output signals for transmitting control commands from the control system to field devices such as control valves, positioners, actuators, and other process instruments. The isolated channel architecture helps separate field-side signals from the system side, making the module suitable for process control applications requiring reliable analog signal transmission. The NFAI543 series is documented as a 16-channel, isolated 4–20 mA analog output module, with a MIL 40-pin interface.
The S01 S1 version is intended for integration into compatible Yokogawa I/O configurations. Typical applications include flow, pressure, temperature, level, valve-position and other continuous process-control loops. Before installation, users should verify the exact suffix, terminal configuration, system compatibility, wiring arrangement, and existing I/O configuration.

NFAI543-S01 S1
📋 Product Datasheet
| Parameter | Value |
|---|---|
| Brand | YOKOGAWA |
| Model | NFAI543-S01 S1 |
| Series | NFAI543 Series |
| Product Name | Analog Output Module |
| Output Type | Analog Current Output |
| Number of Channels | 16 Channels, Isolated |
| Output Signal | 4 to 20 mA DC |
| Interface | MIL 40-Pin Connector |
| Dimensions | Approx. 32 × 127 × 127 mm |
| Weight | Approx. 0.3 kg |
⚙️ Key Technical Features
🔹 16-channel analog output for high-density process-control applications.
🔹 4–20 mA output for connection to industrial actuators and control instruments.
🔹 Isolated channels for improved electrical separation between field signals and the control system.
🔹 MIL 40-pin connection supports organized multi-channel field wiring.
🔹 Typical technical data for the NFAI543 family includes a 10 ms data refresh cycle and approximately 100 ms output step response.
❓ FAQ / Q&A
Q1: What is the YOKOGAWA NFAI543-S01 S1 used for?
A: It is used to provide multiple 4–20 mA analog output signals from a Yokogawa control system to field instruments and actuators.
Q2: How many analog output channels does it provide?
A: The NFAI543 is a 16-channel isolated analog output module.
Q3: What output signal does this module use?
A: The standard NFAI543 configuration provides 4–20 mA analog current outputs.
Q4: Is the NFAI543-S01 S1 an input module?
A: No. It is an Analog Output Module, designed to send control signals from the controller to field devices.
Q5: What should be checked before installation?
A: Confirm the complete model and suffix, compatible Yokogawa hardware, terminal arrangement, wiring, power requirements, and system configuration before installation.
Q6: Can it control valves?
A: Yes. A 4–20 mA analog output module can be used to transmit continuous control signals to compatible valve positioners, actuators and other field devices.
🔧 Recommended YOKOGAWA Models
- NFAI141 — 16-channel 4–20 mA Analog Input Module for process signal acquisition.
- NFAI143 — 16-channel isolated 4–20 mA Analog Input Module for higher-isolation signal monitoring.
- NFAI543-H — 16-channel isolated 4–20 mA Analog Output Module with HART communication capability.
- NFAI841 — 8-channel analog input / 8-channel analog output combination module for mixed I/O applications.
- NFAI835 — Isolated analog I/O module providing combined current input and output channels.
- NFAV144 — 16-channel isolated analog input module for voltage signal applications.
- NFAV544 — 16-channel isolated analog output module with −10 to +10 V output.
- NFAT141 — 16-channel isolated thermocouple/mV input module for temperature measurement.
- NFAR181 — Multi-channel RTD input module for resistance-temperature measurement.
- NFAI135 — 8-channel isolated 4–20 mA analog input module for process instrumentation.
