Yokogawa CNB-I5 PLC/DCS Interface Module

The Yokogawa CNB-I5, also cataloged as the CNB-I5 PLC/DCS Interface Module, operates as a dedicated hardware component for communication and signal interface execution within CENTUM CS 3000 and legacy DCS networks.

Hardware Specifications

Process Control Signal Integration and Isolation Architecture

• Executes high-speed communication bridging between field I/O devices and central control processors to maintain real-time process state synchronization.
• Incorporates channel-to-channel isolation hardware to protect internal processing buses from transient electrical noise and potential ground loops across extended field lines.
• Supports transparent transmission of 4-20 mA HART loop protocol signals across field interface channels, preserving digital device telemetry.

Frequently Asked Questions

Q: What power input specification is required for the CNB-I5 module?

A: The module operates on a nominal supply voltage of 24 VDC.

Q: Which control system architectures support the CNB-I5 interface module?

A: The module is designed for compatibility with Yokogawa CENTUM CS 3000, uXL, and related legacy DCS architectures.

Q: How does the module handle signal degradation and earth potential differences across field connections?

A: The CNB-I5 integrates internal channel-to-channel isolation barriers to decouple field-side voltage spikes and prevent common-mode ground loop currents.

Field Installation Guidelines

• Mount the module securely in the designated rack or panel enclosure slot, ensuring all grounding tabs establish direct electrical contact with the mounting chassis.
• Route all 24 VDC power and field communication wiring through separate wire ducts away from high-voltage AC lines to prevent electromagnetic interference.
• Terminate all field signal cable shields to a single dedicated ground point on the cabinet's low-impedance earth rail.
• Ensure clear physical space around the top and bottom ventilation openings to maintain passive convective cooling within the operating range of -10 to 55 deg C.