Yokogawa AFS40S CENTUM VP Field Control Units

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YOKOGAWA AFS40S Single Field Control Unit The YOKOGAWA AFS40S, also cataloged as the AFS40S Field Control Unit, operates as a...

رمز المنتج: AFS40S

Manufacturer: Yokogawa
Product No.: AFS40S
Product Type: CPU Processors
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 7000g
Shipping port: Xiamen
Warranty: 12 months

وصف التقييمات

YOKOGAWA AFS40S Single Field Control Unit

The YOKOGAWA AFS40S, also cataloged as the AFS40S Field Control Unit, operates as a dedicated hardware component for control logic execution, regulatory control algorithms, and FIO bus communication within CENTUM VP networks. Powered by a 133 MHz RISC processor, the hardware processes 32 MB of battery-backed instruction memory to run complex control cycles, execute sequence logic, and manage alarm messaging across attached distributed nodes. The unit drives primary processing tasks through deterministic data paths, routing real-time process parameters to connected Human Interface Stations (HIS) over redundant communication links.

Hardware Specifications

Parameter	Specification
Model	AFS40S
Brand	Yokogawa
Origin	Japan
Weight	7 kg
Dimensions	207 x 265.9 x 482.6 mm
Operating Temp	0 to +55 deg C
Power Consumption	~60 W
Processor Architecture	133 MHz RISC CPU
System Memory	32 MB with battery retention up to 72 hours
Control Cycle Timing	Minimum 100 ms (Typical execution interval 200 ms to 1 s)
Maximum I/O Capacity	Up to 8 Node Interface Units (NIU) / Max 256 I/O points
Network Interfaces	Dual V-net/IP ports (Redundant configuration)
Bus Interface	Configurable single or dual ESB bus interface
Power Input	24 VDC (+10% / -10% voltage tolerance)
Operating Humidity	5% to 95% RH (Non-condensing)

DCS Network Routing and Signal Conditioning

Functioning as the single-controller execution hub for CENTUM VP architectures, the unit integrates communication management across dual V-net/IP and ESB bus interfaces. Hardware isolation circuits maintain channel-to-channel isolation across backplane contacts, protecting logic paths from field noise and line transients. The module continuously handles field network communications alongside 4-20 mA HART loop protocol parameters, processing analog and discrete I/O cycles down to the 100 ms minimum scan rate threshold.

Frequently Asked Questions

Q: How does the memory preservation hardware behave during an extended system power interruption?

A: The integrated 32 MB main memory relies on an internal battery backup circuit that maintains stored control logic, system parameters, and dynamic sequence states for up to 72 hours during a main power failure.

Q: What operational distinction exists between the AFS40S and duplex FCU models such as the AFS20D?

A: The AFS40S operates as a single CPU processor system without redundant hot-standby CPU hardware. While it includes redundant V-net/IP ports and dual power feed support, CPU processor failure requires a module replacement, whereas duplex models execute seamless, sub-10 ms failover to a secondary processor.

Q: Can the AFS40S module be mounted directly into third-party cabinet frameworks?

A: The hardware conforms to standard 19-inch rack dimensions (207 x 265.9 x 482.6 mm) and installs using standard mounting hole configurations. However, all backplane wiring, ESB bus interfaces, and power distributions must connect strictly to compatible Yokogawa CENTUM VP node hardware.

Field Installation Guidelines

Cabinet Frame Seating: Secure the unit frame into a standard 19-inch rack enclosure using M5 retention screws. Torque all screws evenly to ensure mechanical stability against operational panel vibration.
Grounding Connection: Bond the functional instrument earth grounding stud directly to the central cabinet ground bar using a short, heavy-gauge copper strap. Ensure ground connection resistance remains below 1 Ω.
Cable Pathway Separation: Direct low-voltage ESB bus cables and dual V-net/IP lines through dedicated wiring ducts separate from high-voltage AC distribution power cables. Maintain a minimum distance of 300 mm to suppress electromagnetic interference.
Thermal Environment Management: Provide at least 100 mm of clear vertical ventilation space above and below the chassis assembly to encourage natural air convection. Install auxiliary cabinet fan units if ambient operating temperatures approach the 55 deg C ceiling.

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