Yokogawa ANB10S Node Interface Unit Chassis

Configured for high-density I/O integration in CENTUM distributed control systems, the Yokogawa ANB10S Node Interface Unit Chassis provides direct physical/electrical execution of ESB bus data transmission, I/O module docking, and redundant power management.

Hardware Specifications

Yokogawa DCS Process Control Characteristics

• 4-20 mA HART loop protocol: The ANB10S chassis serves as the backbone interface for I/O modules that aggregate HART diagnostic data. This connectivity is mandatory to ensure transparent passthrough of HART signal overlays from field instrumentation to the DCS.
• FOUNDATION Fieldbus / Profibus PA connectivity: The unit acts as the primary backplane interface for fieldbus-connected subsystems within the ESB architecture. This connectivity is mandatory to provide the deterministic bandwidth required for fieldbus segment communication and I/O synchronization.
• Channel-to-channel isolation: The internal circuitry incorporates galvanic isolation between the ESB bus transceiver and the node power supply. This is mandatory to prevent ground potential differences between remote racks from inducing common-mode noise into the communication backbone.
• Cold junction compensation (CJC): The chassis maintains precise thermal management for the internal bus controllers, which is mandatory to prevent clock drift and timing errors that could otherwise result in ESB bus communication timeouts.

Frequently Asked Questions

Q: Does the ANB10S support true hot-swapping of I/O modules during operation?

A: Yes. The chassis architecture is designed to support the hot-swapping of I/O modules. However, ensure that the specific I/O module being replaced is compatible with hot-swap procedures as defined in the system manual, as improper module removal can induce electrical transients on the backplane bus.

Q: How is power redundancy maintained within the ANB10S chassis?

A: The chassis is configured for dual-redundant power supplies. This redundancy is mandatory to ensure that the system maintains continuous operation in the event of a primary power supply failure. Regular diagnostic checks of the power status LEDs are required to verify the health of both supply inputs.

Field Installation Guidelines

• Mounting: Seat the chassis firmly into the designated rack slot and secure with appropriate mounting hardware. A rigid, vibration-resistant mount is mandatory to prevent mechanical stress on the backplane connectors, which is critical for maintaining reliable ESB bus communication.
• Grounding: Terminate the node chassis to the cabinet’s central safety earth bus. A low-impedance connection is mandatory to provide effective EMI/RFI shielding and to ensure the display and internal logic remain free from electromagnetic interference.
• Wiring: Connect control signals using appropriately rated wire gauge on the I/O module terminals. Keep signal cabling physically separated from high-voltage AC lines by at least 150 mm; this isolation is mandatory to prevent inductive noise injection into the serial communication link.