F3YD08-7A Yokogawa 12–24 V DC Sink-Type Transistor Output Module

Yokogawa F3YD08-7A | 8-Point Transistor Output Module

The F3YD08-7A is an 8-point transistor output module designed for Yokogawa FA-M3 programmable controllers. It provides sink-type DC switching for industrial control loads operating at 12–24 V DC.

Each output point supports a maximum load current of 2 A, with a maximum of 8 A per common. Photocoupler isolation separates the output circuits from the internal control circuitry. A fast response time of 1 ms maximum in both switching directions supports applications that require prompt and repeatable output operation.

01 | Output Architecture at a Glance

Parameter	Specification
Output technology	Transistor contact, sink type
Output channels	8 points
Points per common	8 points/common
Rated load voltage	12–24 V DC
Maximum current per point	2 A
Maximum current per common	8 A
Isolation	Photocoupler isolation
Surge protection	Active clamp

02 | Switching Performance

The module is intended for DC output circuits where predictable switching behavior is important. Its key electrical characteristics are listed below.

Characteristic	Value
OFF to ON response time	1 ms maximum
ON to OFF response time	1 ms maximum
ON voltage	0.5 V DC maximum
OFF-state leakage current	0.1 mA maximum
Service life	Not specified in the supplied data

03 | CPU Error Output Behavior

The output state during a CPU error depends on the CPU type. This setting should be checked during system design and commissioning.

CPU Type	HOLD / RESET Behavior
Sequence CPU	Initial setting: RESET
BASIC CPU	No setting function; always HOLD
OS-free CPU	Initial setting: HOLD; configurable for each group of 8 points

All module outputs can also be set collectively. Confirm the applicable CPU documentation and project safety requirements before selecting the error-state behavior. HOLD and RESET determine output behavior during a CPU error; they should not be treated as a substitute for an independent safety circuit.

04 | Power and Connection Requirements

Item	Specification
Internal current consumption	80 mA at 5 V DC
External supply	12–24 V DC
External supply current	10 mA
External connection	10-point terminal block
Terminal screw	M3.5
Weight	Approx. 130 g

05 | Environmental Operating Limits

Condition	Operating	Storage
Ambient temperature	0 to 55°C	-20 to 75°C
Relative humidity	10 to 90% RH, non-condensing	10 to 90% RH, non-condensing

The installation environment must be free from corrosive gases, flammable gases, and heavy dust. Maintain adequate ventilation and avoid condensation inside the control cabinet.

06 | Engineering Notes for Selection and Commissioning

• Check the load current: The maximum rating is 2 A per output point and 8 A per common. Verify both limits when several loads operate simultaneously.
• Confirm sink-type wiring: Check the load polarity and DC supply arrangement against the module terminal diagram before energizing the circuit.
• Review inductive loads: Solenoids, relays, and contactor coils can generate transient voltage. The module uses an active clamp, but the load and wiring design must still follow the manufacturer's requirements.
• Check OFF-state leakage: The specified leakage is up to 0.1 mA. For low-current loads, confirm that this value will not cause unintended activation or residual voltage problems.
• Verify CPU error settings: Confirm whether the application requires HOLD or RESET behavior and check the setting supported by the installed CPU type.
• Inspect terminal connections: Use the correct M3.5 terminal hardware and tighten connections to the manufacturer's specified torque.

07 | Typical Control Applications

• DC solenoid valve and actuator control
• Relay and contactor coil switching within the rated limits
• Industrial machine sequence control
• Packaging and material-handling equipment
• PLC-controlled auxiliary devices and process equipment
• Replacement or maintenance of compatible FA-M3 output configurations

Before using the module with a specific field device, check the device's operating current, inrush characteristics, polarity, and switching requirements against the module ratings.

08 | Model Identification

Model Code	Configuration
F3YD08	Transistor output module, 8 points
-7A	Sink-type output, 12–24 V DC, 2 A per point

Complete model: F3YD08-7A

09 | Supply and Technical Support

• Product: Yokogawa F3YD08-7A TR Output Module
• Condition: New & Original in Factory Packing
• Warranty: Factory Warranty: 12 Months
• Shipping: FedEx, UPS, DHL
• Support: Model verification and technical selection assistance

Contact our team with your required quantity and delivery destination for a quotation. For replacement projects, provide the existing module model and CPU type so that the configuration can be checked before ordering.

10 | Global PLC Spare HUB Engineering Insight

When selecting a transistor output module, the per-point current rating alone is not enough. The total current through the common group is equally important. For the F3YD08-7A, eight outputs share one common, with a maximum common current of 8 A. A design that uses several high-current loads at the same time must therefore be checked against both the 2 A point limit and the 8 A common limit.

Another important commissioning detail is the OFF-state leakage current. Loads with very low input current may respond differently from conventional relay coils. Checking the field device's minimum operating current and the module's leakage specification can help prevent unexpected output behavior during machine startup or shutdown.

11 | Frequently Asked Questions

Q1: What should be checked if an output indicator is ON but the connected device does not operate?

Start by measuring the voltage at the field device and checking the DC supply polarity. Then inspect the common wiring, terminal tightness, load continuity, and actual current demand. An active PLC output does not by itself confirm that the field circuit is complete.

Q2: Can all eight outputs be used at their maximum rated current simultaneously?

No. The rating is 2 A per point, but the shared common is limited to 8 A. Eight outputs each drawing 2 A would demand 16 A in total. The actual load combination must remain within the common-current limit.

Q3: Why might a low-current electronic load remain slightly active when the output is OFF?

The output has a specified OFF-state leakage current of up to 0.1 mA. Some high-impedance electronic inputs can react to a small residual current. Check the input circuit requirements and consider an appropriate interface solution approved for the application.

Q4: What information is useful when replacing an existing output module?

Record the complete module number, CPU model, terminal wiring, field supply voltage, and connected load current. Also document the required CPU-error output behavior. These details help identify configuration differences that may not be obvious from the module's physical appearance.

Q5: What is a practical way to diagnose intermittent output operation?

Monitor the DC supply while the load is switching, inspect shared common connections, and check whether the total current approaches the 8 A limit. Also review cable routing and terminal condition. If the problem occurs only when several loads operate together, investigate common-group loading before replacing the module.

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