Product Core Brief

• Model: F3WD64-3N
• Brand: YOKOGAWA
• Series: FA-M3 PLC
• Core Function: Combined digital I/O module providing 32-point DC input and 32-point transistor sink output in a single FA-M3 slot.
• Product Type: PLC Digital I/O Module (Combined Input/Output)
• Key Specs: 24V DC input | 24V DC TR sink output | 0.1A per output point | 32 points each
• Condition: New Surplus / Tested

Key Technical Specifications

• Module Type: Combined Digital I/O Module (F3WD series)
• Suffix Code: -3N
• System Compatibility: YOKOGAWA FA-M3 PLC
• Input Points: 32 points DC input
• Input Voltage: 24V DC
• Output Points: 32 points transistor output
• Output Type: TR sink output
• Output Rating: 0.1A per point, 24V DC
• Protection: Output short-circuit protection
• Installation: FA-M3 I/O slot
• Condition: Surplus / Tested

Product Introduction (No Fluff)

The F3WD64-3N is a combined digital I/O module for the YOKOGAWA FA-M3 PLC platform. It packs 32-point 24V DC input and 32-point transistor sink output into a single module, making it a space-efficient choice for applications that need both input and output channels in the same rack area.

For maintenance teams keeping FA-M3 systems running, this module is a direct-fit replacement when restoring I/O capacity after a card failure. Because it combines input and output in one slot, swapping in a verified unit can recover both functions at once without consuming two separate module positions.

QA & Testing SOP (Dynamic & Transparent)

Combined I/O modules get checked on both sides before they leave:

1. Visual & authenticity check: Inspect housing, label, connector pins, and solder joints for rework, burn marks, or counterfeit indicators.
2. Connector & pin inspection: Verify the I/O connector and backplane pin alignment—oxidized or bent pins are a common failure point on older FA-M3 I/O modules.
3. Bench power-up test: Apply rated power on an OEM-compatible FA-M3 test rack and confirm module initialization without fault indicators.
4. Input channel verification: Apply 24V DC to sample input points and confirm correct logic state registration.
5. Output channel verification: Trigger sample output points and confirm transistor sink switching at rated current with short-circuit protection intact.
6. ESD-safe packaging: After testing, the unit is sealed in anti-static shielding with moisture barrier protection for shipment.

Installation Pitfalls & Guide (Engineer to Engineer)

❗ Do notse with -4P. The -3N is rated for 24V DC input, while the -4P variant is for 12V DC input. Mismatched voltage = non-functional inputs.

❗ Output current is 0.1A per point. This is a low-current transistor output. Driving higher-load devices directly (solenoids, large relays) will exceed the rating. Use intermediate relays for heavier loads.

❗ Sink vs. source matters. The F3WD64-3N is a TR sink output, meaning the output switches to ground. The external load must be wired with the positive side supplied externally. Reversing the wiring will prevent the output from functioning.

❗ Check total rack current draw. Adding multiple I/O modules can push the backplane power supply beyond capacity. Verify the sum of all module consumption against the F3PU power supply rating.

Replacement steps:

1. Pre-install: Confirm slot position, input voltage level (24V DC), and output load requirements.
2. Removal: Power down the FA-M3 rack if possible; release the module latch and withdraw straight out.
3. Install: Align pins carefully, seat fully, and secure the latch. Wire I/O connections with correct polarity.
4. Power-on test: Restore power, verify LED status, and confirm input readings and output switching in the PLC program.

Technical FAQ

What he do? It is a combined digital I/O module for the YOKOGAWA FA-M3 PLC, providing 32-point 24V DC input and 32-point transistor sink output (0.1A per point) in a single module.

What is the differenceen and -4P? The -3N variant is 24V DC input, while the -4P is 12V DC input. Both are 32DI/32DO combined modules with TR sink output, but the input voltage rating differs. Always match the suffix to your field wiring voltage.

Can this module drive relays directly? The output is rated at 0.1A per point at 24V DC. Small signal relays may work, but for standard industrial relays or solenoids, use an intermediate relay to avoid exceeding the output current rating.

Is this module still available from Yokogawa? The FA-M3 platform is a mature product line. New OEM stock may be limited. Surplus and tested units are often the most practical option for maintaining existing installations.

What is the warranty? Surplus and tested units typically carry a 12-month functional warranty. Confirm exact terms at checkout, as condition varies by lot.