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Yokogawa AFV30D-S41151/HKU Duplexed Field Control Unit

The Yokogawa AFV30D-S41151/HKU, also cataloged as the AFV30D Duplexed Field Control Unit, operates as a dedicated hardware component for process control logic execution, I/O management, and network interfacing within the CENTUM VP Integrated Production Control System.

Hardware Specifications

Parameter	Specification
ModelBrand	Yokogawa AFV30D-S41151/HKU
Origin	Japan
Weight	7.5-8.5 kg (depending on modules)
Dimensions	19-inch rack mountable
OperatingTemp	-10 degC to +55 degC
StorageTemp	-40 degC to +85 degC
AmbientHumidity	10%-90% RH non-condensing
PowerSupply	100-120 V AC, 50/60 Hz ±3 Hz
PowerRedundancy	Dual-redundant internal modules
Processor	VR5532, 350 MHz, dual-redundant (active/standby hot swap)
MainMemory	128 MB, battery-backed (48-72 hours recharge)
ControlNetwork	Dual-redundant Vnet/IP, 1 Gbps Ethernet
I/OBus	FIO compatible, max 13 nodes
READY Contact Output	2 terminals (NC, C)
ControlFunction	Basic Control Function (LFS1700)
HKU Interface	Cabinet monitoring, fan/door status alarms

Process Control Features

The unit provides deterministic channel-to-channel isolation to prevent signal interference across redundant control paths. It supports integration with 4-20 mA HART loops and FOUNDATION Fieldbus/Profibus PA connectivity, maintaining electrical separation between analog and digital channels to minimize cross-talk and ensure accurate process measurements. Cold-junction compensation (CJc) is applied to thermocouple inputs to maintain precise temperature readings across varying ambient conditions.

Frequently Asked Questions

Q: What is the maximum hot-swap capability for the processor modules?
A: Both processors are hot-swappable under active/standby configuration; the failover occurs without interruption to I/O processing.

Q: How many FIO nodes can be connected to a single FCU?
A: A maximum of 13 nodes per FCU is supported.

Q: Does the FCU support dual Vnet/IP redundancy simultaneously?
A: Yes, both network interfaces operate concurrently to maintain failover continuity.

Field Installation Guidelines

• Mount the FCU in a standard 19-inch rack using vibration-dampening fasteners.
• Ensure proper grounding for the control network and cabinet shield to prevent electrical noise.
• Maintain separation between power and signal cabling to reduce crosstalk.
• Verify ambient airflow within the cabinet to prevent localized heating; fans should remain unobstructed.
• Follow standard ESD precautions when handling memory and processor modules during installation or replacement.

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