Key Parameters:
| Category | Specification |
| ：--- | :--- |
| Function | 8-channel Isolated Analog Input |
| Input Signal Type | 4 to 20 mA DC (Analog Current) |
| Number of Channels | 8 |
| Input Impedance | Typically 50 Ω (or 250 Ω for voltage input versions) |
| Isolation | Channel-to-Channel Isolation: Yes
Channel-to-Backplane Isolation: Yes |
| Resolution | High resolution (e.g., 16-bit or better) for accurate measurement. |
| Accuracy | Typically ±0.1% of reading or better (high accuracy for critical measurements) |
| Conversion Speed | Configurable per channel (e.g., standard update rate for all channels) |
| Diagnostics | Built-in diagnostics for module health, communication errors, wire break detection, and over-range detection. |
| Connection Method | The module has a removable front connector that interfaces with a terminal block unit (TBU), which is wired to the field devices. |
| Compatible Systems | • Yokogawa ProSafe-RS (Safety Instrumented System)
• Yokogawa CENTUM VP (Distributed Control System) |
| Mounting | Installed in a dedicated N-IO Node, RIO cabinet, or other compatible Yokogawa rack assemblies. |
| Status Indicators | Per Channel: LED indicates activity or error status.
Module-Wide: LEDs for module status (RUN, ERR, etc.) and power. |
| Internal Consumption | Powered from the system backplane. |

Typical Application
This module is used to interface with a variety of analog field instruments:

Field Devices: Pressure transmitters, temperature transmitters, level transmitters, flow meters, analog valves with position feedback, and any other device with a 4-20mA output.

Wiring: Each 2-wire or 4-wire transmitter is connected to an individual channel on the module.

Operation: The module precisely measures the current loop (4-20 mA) for each channel, converts it to a digital value, and transmits it to the controller.

System Integration: The controller uses these values for PID control, process monitoring, alarm generation, and safety interlocking.