Overview
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | NFBU200-015 |
| Brand | Yokogawa Electric Corporation |
| Origin | Japan |
| Product Type | STARDOM FCN Long Type Base Module |
| System Compatibility | STARDOM FCN Series, including FCN-500 and FCN-RTU |
| Module Type | Base Module (Long Type) |
| Mounting Type | 19 inch rack-mounted or DIN rail-mounted configuration depending on option |
| Maximum I/O Capacity | Supports up to 8 I/O modules |
| Power Supply Configuration | Supports dual power supply module installation |
| Internal Bus | SB Bus / E2 Bus |
| Weight | Approx. 1.0 kg to 1.9 kg depending on mounting assembly |
| Dimensions | Approx. 482 mm x 132.5 mm x 40.5 mm (rack mount); Approx. 440 mm x 131 mm x 42.3 mm (DIN rail) |
| Operating Temp | -20 deg C to +70 deg C (variant dependent) |
| Storage Temp | -40 deg C to +85 deg C |
| Operating Humidity | 5% to 95% RH, non-condensing |
| Power Consumption | 5 VDC self-consumption: Max. 0.4 A; 24 VDC self-consumption: 0 A |
| Cooling Method | Natural air cooling, fanless structure |
| Protection Rating | IP20 |
| Vibration Resistance | 0.15 mm P-P at 5 Hz to 58 Hz; 1 G at 58 Hz to 150 Hz |
| Shock Resistance | 15 G, 11 ms half-sine wave |
| Corrosive Gas Resistance | ANSI/ISA S71.04 Class G2 standard, Class G3 optional |
Process Control Bus and Channel Isolation Characteristics
The Yokogawa NFBU200-015 provides the electrical base structure for FCN controller assemblies. It distributes internal bus signals through the SB Bus and E2 Bus pathways while supplying mounting interfaces for CPU, power supply, and I/O modules.
Furthermore, the module supports process control architectures requiring channel-to-channel isolation through compatible Yokogawa I/O modules. The base module itself does not perform signal conversion, but it maintains the physical connection between field interface modules and FCN processing units.
The NFBU200-015 supports modular FCN configurations where redundant power supply arrangements improve system availability. However, redundancy behavior depends on the installed CPU and power supply modules.
Frequently Asked Questions
Q: Does the NFBU200-015 perform analog or digital signal processing?
A: No. The NFBU200-015 is a base module that provides mechanical mounting, power distribution, and internal bus connection. Signal processing is performed by installed FCN CPU and I/O modules.
Q: Can the NFBU200-015 operate with redundant power supplies?
A: Yes. The base module supports installation of dual power supply modules for redundant power configurations when compatible modules are installed.
Q: Does the NFBU200-015 support hot-swapping of I/O modules?
A: Hot-swap capability depends on the FCN system configuration and installed modules. Field replacement procedures must follow Yokogawa FCN hardware specifications.
Field Installation Guidelines
- Install the NFBU200-015 on a compatible rack or DIN rail structure according to the selected mounting configuration.
- Verify that CPU modules, power supply modules, and I/O modules are correctly seated before applying system power.
- Keep internal bus connectors free from dust, moisture, and mechanical contamination during installation.
- Route power wiring separately from high-current switching cables to reduce electrical interference.
- Connect protective grounding according to the applicable control cabinet grounding standard.
- Maintain proper cable routing clearance around the base module to support natural air cooling.
- Confirm module compatibility before expanding the FCN configuration with additional I/O units.
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