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Yokogawa AFV10D-S41451 Field Control Unit

The Yokogawa AFV10D-S41451, also cataloged as the AFV10D Field Control Unit, operates as a dedicated hardware component for process control execution and I/O module communication management within CENTUM VP platforms.

Suffix Breakdown & Model Matrix

Suffix Code	Description	Specifications / Selections
AFV10D	Base Model	Field Control Unit for CENTUM VP (Duplexed Vnet/IP, 19-inch Rack Mountable)
-S	Type	Standard Type
4	Dual-Redundant Power Supply	100 - 120 V AC, 50/60 Hz Power Supply
1	Basic Software License	For Standard Functions
4	Sub-system Communication	LFS1150 Node Expansion License / Communication capability
5	Layer 3 Network/Options	High-speed, specific regulatory, or environmental specification
1	Design Code	Revision/Style code designated by Yokogawa

Hardware Specifications

Parameter	Specification
Model Brand	Yokogawa
Origin	Japan
Weight	15 to 18 kg (Depending on specific modules installed)
Dimensions	Standard 19-inch rack-mountable width, depth configurations vary by enclosure
Operating Temp	0 to 50 degC
Power Consumption	Approximately 200 VA
Storage Temperature	-20 to 70 degC
Operating Humidity	10 to 90 % RH (No condensation)
Temperature Change Rate	Within \pm10 degC/hour
Withstanding Voltage	1500 V AC for 1 minute (between power and grounding terminals)
Control Network	Vnet/IP (Dual-redundant 1000 Mbps Ethernet-based control network)
Processor Redundancy	Dual-redundant (Duplex) CPU modules with automatic bump-less switchover

Process Control and Instrumentation Integration

The hardware implements dedicated control processing for instrument loops, incorporating native processing pathways for 4-20 mA HART loop protocol parameters and external digital communication fieldbuses. Channel-to-channel isolation architecture prevents ground loop propagation across connected I/O nodes, protecting internal processor circuitry from field-side electrical surges. For thermal measurement loops connected via peripheral nodes, internal algorithmic cold junction compensation (CJC) processing maintains digitization accuracy across varying cabinet temperatures. Continuous dual-redundant memory synchronization replicates variables between active and standby CPU modules, limiting control transfer disruption during automated switchover events.

Frequently Asked Questions

Q: What are the restrictions regarding hot-swapping modules within the duplex configuration?

A: CPU modules, power supply units, and I/O communication cards can be replaced online (hot-swapped) without suspending controller execution. The standby module must achieve complete data synchronization with the active controller prior to removing any redundant hardware components.

Q: How is the system grounding configured to avoid signal interference across the Vnet/IP control network?

A: The grounding terminal requires connection to an isolated, dedicated instrumentation ground loop with a grounding resistance value meeting local electrical codes (typically less than 100 Ohms). Power line ground and signal cable shields must be isolated from the structural frame to mitigate electrical noise injection.

Field Installation Guidelines

• Mounting Structure: Install the unit into a standard 19-inch rack or dedicated system cabinet using standard securing fasteners to prevent physical strain or misalignment.
• Thermal Management: Ensure vertical clearance zones above and below the chassis are kept clear of structural obstructions to permit unhindered natural air cooling or cabinet fan-driven convection airflow.
• Wiring Separation: Route standard AC power lines separately from high-speed Vnet/IP communication lines and low-voltage field signal cables to minimize electromagnetic coupling.
• Shielding Ground Continuity: Terminate all external ESB/ER bus cable shielding frames firmly to the chassis ground at the entrance panel using heavy-duty grounding clamps.

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