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Yokogawa AFV10D-S41451 Duplexed Field Control Unit

Configured for deterministic field control execution in Yokogawa CENTUM VP systems, the Yokogawa AFV10D-S41451 (AFV10D) Duplexed Field Control Unit provides direct physical and electrical execution of process control strategies via redundant Vnet/IP communication and dual processor operation.

Suffix Breakdown & Model Matrix

Code Segment	Definition
AFV10D	Duplexed FCU for Vnet/IP, 19-inch rack mount
-S	Standard type
4	Dual-redundant power supply, 100–120 V AC
1	Base software license (standard functions)
4	LFS1300 control function package
5	Equipped with HKU interface
1	Standard specification indicator

Hardware Specifications

Parameter	Specification
Model Brand	Yokogawa AFV10D-S41451
Origin	Japan
Weight	14 kg
Dimensions	6U x 19-inch rack width
Operating Temp	0 to 50 degC
Power Consumption	Approx. 200 VA
Power Supply	100–120 V AC, 50/60 Hz ±3 Hz
Control Network	Dual-redundant Vnet/IP, 1 Gbps
Redundancy	CPU, power supply, network ports
Control Cycle	50 / 100 / 200 ms configurable
HKU Support	Yes

Vnet/IP Deterministic Network Execution

The AFV10D-S41451 utilizes Vnet/IP deterministic Ethernet protocol to maintain fixed-latency communication between the Field Control Station and Node Units. Redundant optical links ensure zero-loss data transfer during single-path failure. Channel-to-channel isolation is implemented at the backplane level to prevent transient propagation from I/O faults into the control domain.

Frequently Asked Questions

Q: What is the hot-swap behavior for CPU modules in this unit?

A: Processor modules support online replacement without interrupting control execution due to full state synchronization between active and standby units.

Q: Is the HKU interface electrically isolated from process I/O circuits?

A: Yes. The HKU interface operates on an independent galvanically isolated circuit to prevent influence from field device faults.

Q: Are firmware revisions backward-compatible with earlier AFV10D configurations?

A: Firmware compatibility depends strictly on the LFS1300 license version and installed system libraries; mixing incompatible revisions may block network join operations.

Field Installation Guidelines

Mount the unit into a standard 19-inch EIA rack using secure front panel fasteners. Ensure rack grounding meets Yokogawa’s <1 ohm earthing resistance requirement. Use separate conduits for power and signal cabling to minimize electromagnetic coupling. Verify power supply phase alignment prior to energizing redundant AC feeds. For HKU-connected sensors, route wiring away from high-current busbars to prevent false temperature or fan-failure alarms.

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