Configured for high-speed parallel bus communication and module mounting in Yokogawa FA-M3 series platforms, the YOKOGAWA F3BU09-0N/D2 (F3BU09-0N/D2 Base Unit) provides direct physical/electrical execution. It serves as the main structural chassis for one power supply module, one CPU module, and up to nine peripheral expansion modules. The unit establishes the system backplane to deliver internal logic power distribution and deterministic signal transfer across all installed cards without reliance on external wiring harnesses.
| Parameter | Specification |
|---|---|
| Model | F3BU09-0N/D2 |
| Brand | YOKOGAWA |
| Origin | Japan |
| Weight | 2.78 kg |
| Dimensions | 392.2 mm (W) x 130.0 mm (H) x 25.5 mm (D) |
| Operating Temp | 0 to 55 deg C |
| Power Consumption | 55 mA or less (at 5 VDC internal backplane bus) |
| Compatible Series | FA-M3 / FA-M3V |
| Total Module Slots | 9 I/O slots (excluding dedicated CPU and Power Supply slots) |
| Mounting Type | DIN rail mounting (/D2 option) or panel mounting |
| Cooling | Natural convection |
| Operating Voltage Range | 20.4 to 28.8 VDC |
The YOKOGAWA F3BU09-0N/D2 utilizes a proprietary parallel backplane bus to ensure low-latency data transfers between peripheral cards and the central processing module. Channel-to-channel isolation parameters on installed I/O cards rely on the main baseboard logic ground paths to eliminate ground loop interference in sensitive analog circuits. Internal traces maintain cold junction compensation (CJC) stability for temperature input cards by routing internal power lines away from sensitive signal pathways. Furthermore, the baseboard design maintains a regulated 5 VDC logic bus line to support high-density analog and 4-20 mA HART loop communication cards mounted across any of the nine available expansion slots.
Q: What is the primary purpose of the /D2 option suffix on the F3BU09-0N/D2?
A: The /D2 suffix designates the factory-configured version supplied with a DIN rail mounting bracket kit, which allows direct mechanical latching onto standard 35 mm DIN rails without custom adapters.
Q: How does the baseboard handle module replacement during active cabinet operation?
A: The physical guide rails and backplane connector pin lengths allow hot-swap module removal and insertion while keeping adjacent modules grounded, provided the main power supply module remains stable within operating voltage limits.
Mount the base unit vertically on standard 35 mm DIN rails or directly to a metallic cabinet backpanel using grounding screws to ensure continuous chassis-to-earth bonding. Retain a minimum clearance of 50 mm above and below the baseboard to facilitate natural convection airflow across installed modules. Connect the field ground wiring to the designated grounding terminal on the left side of the frame prior to energizing the main power supply module. Ensure all module connector locking levers engage fully with the backplane slots to prevent intermittent bus connection failures under industrial vibration conditions.
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