Yokogawa AFV30D-A41251 CENTUM VP Control Unit

The Yokogawa AFV30D-A41251, also cataloged as the AFV30D Duplexed Field Control Unit, operates as a dedicated hardware component for Vnet/IP communication and field I/O processing within CENTUM VP control system platforms.

Suffix Breakdown & Model Matrix

Hardware Specifications

Process Control and DCS Characteristics

• 4-20 mA HART loop protocol: The unit manages FIO communication, supporting pass-through of HART protocol data from field instrumentation to the control function for asset management and process monitoring.
• FOUNDATION Fieldbus / Profibus PA connectivity: Integration with the field control station allows for high-speed deterministic data exchange, supporting standardized digital bus communications within the CENTUM VP architecture.
• Channel-to-channel isolation: The modular design ensures electrical isolation between internal processing boards and field I/O segments, maintaining signal integrity and protection against common-mode noise across the I/O bus.
• Cold junction compensation (CJC): The unit interfaces with associated FIO modules that provide precise thermal compensation for thermocouple-based temperature measurement inputs.

Frequently Asked Questions

Q: What is the required duration for a full battery recharge?

A: The main memory backup battery requires at least 48 hours of continuous power to reach a full recharge state after being fully depleted.

Q: How many node units can be connected to this FCU?

A: The AFV30D-A41251 supports the connection of up to 13 node units per Field Control Unit.

Field Installation Guidelines

• Mounting: Secure the AFV30D unit into a standard 19-inch rack. Utilize all mounting points to ensure mechanical stability during operation. Ensure adequate clearance for airflow to comply with the -10 deg C to +55 deg C operating temperature range.
• Grounding: Connect the cabinet-level protective earth (PE) bus to the unit's grounding terminal. A low-impedance ground path is required to suppress interference on the Vnet/IP communication lines.
• Wiring: Ensure power supply input (220 - 240 V AC) is routed through appropriate circuit protection. Separate Vnet/IP network cabling from power delivery conductors to prevent induced signal degradation.