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Description
Yokogawa AFS30D Duplexed Field Control Unit
The Yokogawa AFS30D, also cataloged as the AFS30D Duplexed Field Control Unit, operates as a dedicated hardware component for executing process I/O control across CENTUM CS 3000 platforms.
250 VA (100-120 VAC), 400 VA (220-240 VAC), 4.5 A (24 VDC)
FCUStatusOutput
2 terminals (NC, C), 30 V DC max, 0.3 A
Installation
Rack-mounted, 19-inch
Process Control Specific Features
Supports 4-20 mA HART loop protocol integration for analog input/output modules.
Channel-to-channel isolation minimizes interference between parallel I/O operations.
Cold junction compensation (CJC) supported for precise thermocouple measurements.
Sequence of Events (SOE) data transfer to centralized SOE servers with timestamp accuracy.
Frequently Asked Questions
Q: VnA: Can the AFS30D memory be replaced or expanded while powered? A: Memory is battery-backed and not designed for hot-swap replacement; maintenance requires controlled power-down procedures.
Q: VnA: What is the expected switchover time in duplexed operation? A: The backup processor takes control seamlessly within milliseconds; precise timing depends on configured process routines.
Q: VnA: Are firmware upgrades supported via network interfaces? A: Yes, firmware updates are executed via redundant Vnet or FIO buses following manufacturer-approved procedures.
Field Installation Guidelines
Mount unit in standard 19-inch rack; secure using rack screws and rails.
Ensure Vnet and FIO cables are segregated from high-voltage power lines to reduce EMI.
Proper grounding of chassis is required; connect grounding points to plant common earth.
Maintain minimum clearance of 50 mm around airflow vents for adequate cooling.
Connect FCU status contacts to monitoring relay circuits following 30 V DC, 0.3 A limitations.
