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Yokogawa AFV30S-S31262 Field Control Unit

The Yokogawa AFV30S-S31262, also cataloged as the AFV30S Field Control Unit, operates as a dedicated hardware component for deterministic Vnet/IP data routing and local FIO module execution within CENTUM VP Distributed Control System platforms.

Suffix Breakdown & Model Matrix

Code	Definition
AFV30S	Standard Field Control Unit, 19-inch rack mount
S	Standard type
3	Dual-redundant Vnet/IP, single power supply
1	100 - 120 V AC Power Supply
2	Basic type, no explosion protection
6	ISA Standard G3 conformal coating
2	Control function license included

Hardware Specifications

Parameter	Specification
Model Brand	Yokogawa AFV30S-S31262
Origin	Japan
Weight	7.0 kg
Dimensions	482.6 x 440 x 177 mm (W x D x H)
Operating Temp	0 to 55 degC
Power Consumption	200 VA
Processor	CP461 / CP471 compatible
Memory	128 MB (Battery-backed, 72 hr hold)
Network Speed	1 Gbps Full Duplex
Local I/O Slots	8 slots
ESB Node Capacity	13 to 14 nodes

Vnet/IP Deterministic Network Performance

The AFV30S-S31262 utilizes Vnet/IP protocol to ensure deterministic packet delivery across Layer 2 switched networks. The unit requires CAT5e or better UTP cabling, limited to 100 meters from the switch port. Channel-to-channel isolation is maintained at the backplane level to prevent ground loop interference between FIO modules. Data integrity is preserved via CRC validation on every frame transmitted across the control network.

Frequently Asked Questions

Q: What is the battery recharge time required to maintain memory backup?

A: The onboard lithium battery requires a minimum recharge time of 48 hours after a cold start to ensure full 72-hour memory retention capability.

Q: Can the power supply be upgraded to dual-redundant configuration?

A: Yes, the unit is configured with a single 100-120 V AC power supply but supports field upgrades to dual-redundant power input using compatible Yokogawa power modules.

Q: What is the maximum number of ESB Bus node units supported?

A: Up to 14 Optical ESB Bus node units can be connected per FCU when using EC401 or EC402 coupler modules.

Field Installation Guidelines

Install the unit in a standard 19-inch metallic cabinet using 8 x M5 screws. Ensure the cabinet door is grounded to the enclosure frame to meet EMC specifications. Use M4 screw terminals for power input and status contact wiring; torque to the manufacturer's specified value. Apply G3 conformal coating inspection annually in corrosive gas environments. Maintain clear airflow around the 4U chassis to prevent thermal accumulation. Verify RJ45 connector locking tabs are fully engaged before energizing the Vnet/IP network.

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