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Yokogawa F3XD64-3F Digital Input Module

The Yokogawa F3XD64-3F, also cataloged as the F3XD64-3F Digital Input Module, operates as a dedicated hardware component for high-density 24 VDC discrete signal acquisition within Yokogawa FA-M3 platforms.

Suffix Breakdown & Model Matrix

Base Model Suffix / Feature Technical Description
F3XD64 Base Model FA-M3 high-density 64-point DC digital input module
F3XD64 -3F 24 VDC sink/source input logic with fast optical response

Hardware Specifications

Parameter Specification
Model F3XD64-3F
Brand Yokogawa
Origin Japan
Weight 0.14 kg (Net) / 0.40 kg (Shipping)
Dimensions 30 x 120 x 130 mm
Operating Temp -20 to +55 deg C
Power Consumption 600 mA at 5 VDC
Input Channels 64 digital inputs (Sink/Source)
Nominal Voltage 24 VDC (18 to 26.4 VDC range)
Input Current 7 mA per channel
On-State Voltage 18 VDC minimum
Off-State Voltage 5 VDC maximum
Response Time 2 ms or less
Isolation Optical and electrical isolation per channel group

4-20 mA HART Loop Protocol & Channel-to-Channel Isolation

The module processes 64 discrete 24 VDC input channels using sink or source wiring configurations to capture real-time field device states. Dedicated optical and electrical isolation circuits decouple field-side voltage spikes from the internal system backplane logic, preventing ground loop propagation and electromagnetic noise interference across high-density signal groups. Internal signal conditioning circuitry filters digital inputs with response times of 2 ms or less, while 64 individual status LEDs on the front panel provide real-time diagnostic visibility for field-level signal validation.

Frequently Asked Questions

Q: Does the F3XD64-3F support both sink and source field wiring configurations?

A: The input circuitry accommodates both sink and source wiring topologies for 24 VDC discrete signals, allowing flexible connection to diverse field contact devices.

Q: Can the removable terminal block be detached while the PLC frame is powered?

A: Technicians can remove the terminal block for wiring maintenance; however, backplane bus power must be isolated or standard system safety precautions maintained before removing the underlying base module from the FA-M3 rack.

Q: What mechanisms protect the internal FA-M3 backplane bus from field-side voltage transients?

A: Each channel group incorporates optical isolation barriers that block high-voltage surges and field noise from entering the internal logic and communication backplane.

Field Installation Guidelines

Mount the module directly into its designated slot on the FA-M3 base rack frame, ensuring the upper and lower mechanical latches lock completely into place to establish backplane connection. Confirm that cabinet ambient temperatures remain within the -20 to +55 deg C operating range and that relative humidity stays below 95% non-condensing.

Route all 24 VDC field input cables through dedicated wire raceways, keeping low-voltage signal wiring separated from high-voltage AC lines and motor drive outputs. Terminate field wiring at the removable clamp terminal block, securing screw terminals to standard specifications. Ground all cable shields at a single ground point on the cabinet chassis frame to ensure robust signal integrity across all 64 input points.

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