AFS30D-H4121 Yokogawa CENTUM Series Datasheet & Technical Manual

Yokogawa AFS30D-H4121 CENTUM VP Duplex Field Control Unit

Yokogawa AFS30D-H4121 CENTUM VP Duplex Field Control Unit

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YOKOGAWA AFS30D-H4121 Duplex Field Control Unit The YOKOGAWA AFS30D-H4121, also cataloged as the AFS30D Duplex Field Control Unit, operates as...

SKU: AFS30D

Manufacturer: Yokogawa
Product No.: AFS30D
Product Type: CPU Processors
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 8000g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

YOKOGAWA AFS30D-H4121 Duplex Field Control Unit

The YOKOGAWA AFS30D-H4121, also cataloged as the AFS30D Duplex Field Control Unit, operates as a dedicated hardware component for real-time control logic execution and deterministic ethernet data exchange within CENTUM VP distributed control systems. Powered by a 133 MHz RISC processor, the chassis processes 32 MB of battery-backed instruction memory to execute continuous control loops, sequence logic, and network communications with Human Interface Stations (HIS). The unit manages dual V-net/IP interfaces and dual ESB bus routing paths to maintain uninterrupted operation across remote subsystem connections.

Hardware Specifications

Parameter	Specification
Model	AFS30D-H4121
Brand	Yokogawa
Origin	Japan
Weight	8 kg
Dimensions	207 x 265.9 x 482.6 mm
Operating Temp	0 to +55 deg C
Power Consumption	80 W
Processor Engine	133 MHz RISC Processor
System Memory	32 MB with battery retention backup up to 72 hours
Control Cycle Timing	Minimum 100 ms (Typical execution cycle 200 ms to 1 s)
I/O Point Capacity	Up to 8 NIU nodes / Max 256 I/O points
Communications	Dual 10BASE-T / 100BASE-TX Ethernet, dual V-net/IP, dual ESB bus
Network Protocols	TCP/IP, UDP, V-net/IP
Hardware Redundancy	Dual CPUs, dual 24 VDC power modules, dual V-net/IP, dual ESB bus
Switchover Failover Latency	Less than or equal to 10 ms seamless transfer
Power Supply Input	24 VDC (+10% / -10% input tolerance)
Operating Humidity	5% to 95% RH (Non-condensing)
Safety & Ingress Ratings	SIL2 safety compliance, CE, UL, CSA, RoHS

Process Control Isolation and Fault Isolation

The module incorporates redundant hardware execution planes to maintain uninterrupted processing for analog and digital control loops. Communication interface lines utilize high-grade channel-to-channel isolation circuits to prevent high-voltage electrical noise from propagating to internal system memory during transient field events. The architecture handles data synchronization over V-net/IP while concurrently routing analog variables over the 4-20 mA HART loop protocol framework, ensuring that real-time process monitoring continues during field bus state changes.

Frequently Asked Questions

Q: What mechanisms guarantee sub-10 ms CPU failover during a processor hardware fault?

A: The primary and secondary VR5432 RISC processors run identical control algorithms in parallel lockstep execution. Dual cross-domain bus monitors continually check execution registers over the backplane. When a hardware fault or instruction parity error occurs on the active CPU, hardware logic switches control execution to the secondary CPU within 10 ms or less without losing data states or disturbing active output channels.

Q: How does the unit maintain network connectivity with third-party subsystems over Ethernet?

A: The module integrates standard 10BASE-T / 100BASE-TX dual Ethernet physical layers that support TCP/IP and UDP protocols. The internal communication processor manages protocol translation between external PLCs or network nodes and the primary CENTUM VP execution core.

Q: What are the online maintenance parameters for attached Node Interface Units (NIU)?

A: All I/O channels connected over the redundant ESB bus architecture support full hot-swappable replacement. Maintenance personnel can extract and insert individual input/output cards on live NIU nodes without powering down the primary AFS30D-H4121 processing core or interrupting active process control execution.

Field Installation Guidelines

Cabinet Frame Seating: Fasten the chassis into a standard 19-inch rack slot using M5 mounting screws. Verify that the cabinet frame is mechanically rigid to avoid vibration-induced micro-interruptions along the rear backplane connectors.
Redundant Power Cabling: Wire independent 24 VDC primary and secondary power sources to the dual supply input terminals. Use separate external thermal-magnetic circuit breakers for each feed path to ensure true power supply fault isolation.
Shield Grounding Matrix: Connect all V-net/IP coaxial lines, Ethernet network cables, and ESB bus shields directly to the cabinet instrument functional earth bar. Keep the functional ground path isolated from protective safety ground cabling, keeping total loop resistance under 1 Ω.
Thermal Circulation Clearance: Leave a minimum vertical clearance of 100 mm above and below the FCU chassis within the enclosure. If internal cabinet ambient temperatures exceed 55 deg C, install forced-air cooling fans to ensure heat dissipation away from the processor heatsinks.

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