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Yokogawa AFV30D-S41262 Duplexed Field Control Unit

The Yokogawa AFV30D-S41262, also cataloged as the AFV30D Duplexed Field Control Unit, operates as a dedicated hardware component for deterministic regulatory and sequencing execution within CENTUM VP distributed control platforms.

Suffix Breakdown & Model Matrix

Code Segment	Definition
AFV30D	Duplexed Field Control Unit, Vnet/IP, FIO compatible, 19-inch rack mount
-S	Standard type for CP461 processor modules
4	Dual-redundant Vnet/IP interfaces and dual-redundant power supplies
1	Internal designation (fixed value)
2	220–240 V AC power supply voltage
6	ISA Standard G3 conformal coating, no explosion protection
2	Compatible with R6.01 or later firmware/software

Hardware Specifications

Parameter	Specification
Model Brand	Yokogawa AFV30D-S41262
Origin	Japan
Weight	8.0 kg
Dimensions	482.6 x 310 x 177 mm (W x D x H)
Operating Temp	0 to 50 degC
Power Consumption	230 VA
Processor	VR5532, 350 MHz
Main Memory	128 MB
Memory Backup	Battery-backed, up to 72 hours
Network Interface	Vnet/IP, 1 Gbps, dual-redundant
Node Unit Capacity	Up to 13 FIO expansion nodes
Status Contact Output	2 terminals (NC, C), 30 V DC, 0.3 A max
Power Input	220–240 V AC, 50/60 Hz
Mounting	19-inch rack-mountable

Cold Junction Compensation & 4-20 mA HART Loop Protocol

The AFV30D-S41262 executes cold junction compensation for connected thermocouple inputs to maintain accurate temperature conversion without external reference sources. HART protocol operates concurrently with 4-20 mA analog loops, allowing device diagnostics and parameter adjustments without interrupting control execution. Channel-to-channel isolation limits ground loop effects when interfacing multiple measurement points.

Frequently Asked Questions

Q: What is the processor switchover time in duplex mode?

A: Switchover completes in less than 10 ms with no change to control outputs.

Q: Can the unit operate with one power supply module removed?

A: Yes, but redundancy is lost until both modules are installed.

Q: Does firmware require manual loading after CPU replacement?

A: No, firmware synchronizes automatically from the active CPU to the replacement module.

Field Installation Guidelines

Mount the FCU into a grounded 19-inch rack with adequate clearance for airflow. Route power and signal cables in separate pathways to reduce electromagnetic interference. Terminate cable shields at the rack ground point only. Verify incoming AC voltage matches the 220–240 V AC rating before energizing. Ensure all Vnet/IP connectors are fully latched prior to system startup.

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