F3YA08-2N Yokogawa FA-M3 TRIAC AC Output Module

Engineering Architecture & System Matrix

The F3YA08-2N card designed by Yokogawa operates as a robust TRIAC Output Module within the modular FA-M3 Series controller family. Engineered for solid-state AC load switching, this 8-channel output module handles line-voltage actuators without mechanical contact wear or audible relay arc noise.

• Catalog Model Code: F3YA08-2N
• Manufacturer & Brand: Yokogawa Electric Corporation
• Product Classification: FA-M3 Series TRIAC Solid-State AC Output Module
• Channel Density: 8 total outputs (8 points sharing 1 common line)
• Field Wiring Interface: 10-point detachable terminal block with M3.5 screws
• Backplane Current Load: 130 mA at 5 V DC (drawn directly from host rack)
• External Power Supply Requirements: None required for internal logic

Technical Specifications & Performance Metrics

Industrial Applications & System Environments

• AC Solenoid & Valve Actuation: Direct switching of 110V/230V AC hydraulic control valves, pneumatic directional valves, and process dampers.
• Industrial Thermal Control: Precise zero-cross switching of AC heating elements, industrial ovens, and heat-sealing bars in packaging lines.
• Motor Starter & Contactor Control: Actuates 100-240V AC magnetic contactor coils and motor starters without contact pitting or erosion.

Diagnostic Capabilities & System Protection Features

• Dual Transient Protection: Combines an internal CR snubber network with a metal-oxide varistor (MOV) to clamp high-voltage AC inductive kickback.
• Photocoupler Channel Isolation: Prevents high-voltage AC line spikes and ground noise from propagating back into the FA-M3 backplane.
• Thermal Current Monitoring: Supports deterministic current scaling to prevent thermal overload during elevated ambient enclosure temperatures.

Global PLC Spare HUB's Insight

Deploying solid-state TRIAC outputs like the F3YA08-2N offers exceptional long-term reliability over electromechanical relays, eliminating physical contact wear. However, field engineers must account for the 3.0 mA maximum OFF-state leakage current inherent to TRIAC junctions. When driving low-power AC loads, such as small relay coils or LED pilot lights, this leakage current can cause false coil holding or light flickering; installing a parallel bleeder resistor across low-impedance loads resolves this immediately. Additionally, strictly monitor cabinet ambient temperatures—if enclosure temperatures rise above 40°C, total per-point current capacity derates from 1.0 A down to 0.7 A, and total common current must never exceed the 3.0 A structural trace limit.

Logistics, Packaging & Warranty Terms

• Condition Status: 100% New & Original factory-sealed hardware.
• Warranty Coverage: Comprehensive 12 Months factory warranty from date of purchase.
• Order Handling: Rapid 24 to 48 hour processing and dispatch window.
• Global Express Shipping: Fast, secure air delivery worldwide via FedEx, UPS, and DHL.

Frequently Asked Questions

Why does the ON-to-OFF response time depend on the AC power cycle frequency?

TRIAC devices naturally stay conductive until the alternating current waveform passes through zero, meaning turn-off timing takes up to a half AC cycle (8.3 ms at 60Hz or 10 ms at 50Hz) plus 1 ms.

How does ambient operating temperature affect channel current ratings on the F3YA08-2N?

Between 0°C and 40°C, each channel supports a full 1.0 A current load; from 40°C to 55°C, continuous current per channel derates linearly down to a maximum of 0.7 A.

Is an external power supply required to operate the module logic?

No external power supply is required; internal control logic power is drawn entirely from the 5 V DC FA-M3 backplane bus at 130 mA.

What prevents high-voltage inductive transients from damaging the output channels?

Each channel integrates an onboard CR absorber (snubber circuit) parallel with a MOV varistor to absorb inductive switching transients from solenoids and contactor coils.

What selection guidelines ensure small AC loads turn off completely when wired to TRIAC outputs?

Verify that the load's holding current exceeds the module's 3.0 mA leakage current; if the load holding threshold is lower, install an auxiliary load resistor across the output terminals to bleed residual voltage.

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