NFBU200-S10

The Yokogawa NFBU200-S10 is a long base module used to assemble a Yokogawa FCN autonomous controller or extension unit. It provides the mounting positions and internal SB bus connections for CPU, power supply, I/O, and extension modules. Its long-format chassis supports multiple function modules and a duplex internal bus architecture for system configuration.

Product Function and Architecture

The NFBU200 provides the mechanical mounting structure and electrical backplane connections for the FCN controller assembly. Its internal SB bus distributes communication between the installed function modules, while dedicated power supply positions accommodate single or duplex power supply configurations.

The base module provides:

• 2 power supply module slots for single or duplex power configurations.
• 10 function module slots for CPU, I/O, and extension modules.
• Duplex SB bus (internal backboard bus) for internal module communication.
• Support for use as either a control unit or an extension unit.

One CPU module occupies two function module slots. The available I/O capacity therefore depends on the CPU configuration and whether extension modules are installed.

Mounting and Physical Configuration

The NFBU200-S10 is the DIN rail-mounted version of the NFBU200 long base module. Its mounting arrangement is intended for cabinet installations where the controller is assembled from separately installed CPU, power supply, and I/O modules.

The physical design also includes configuration switches for unit number selection and CPU duplex settings. Unused module positions must be fitted with the appropriate dummy covers according to Yokogawa installation requirements.

Technical Specifications

Parameter	Specification
Model	NFBU200-S10
Brand	Yokogawa
Product Type	Long Base Module
System	STARDOM FCN
Mounting Type	DIN rail-mounted
Power Supply Slots	2
Function Module Slots	10
Internal Bus	Duplex SB bus
Maximum Self-Consumption	0.4 A at 5 V DC
Weight	0.9 kg

Frequently Asked Questions

Q: Is the NFBU200-S10 a bus interface module?

A: No. It is a long base module with an integrated duplex SB bus. The separate N2EB100 is the E2 bus interface module used for extending the FCN system.

Q: Can the NFBU200-S10 support redundant CPU and power supply configurations?

A: The NFBU200 platform supports duplex CPU and power supply configurations. CPU redundancy requires matching CPU models, suffix codes, and system software versions, together with the correct base module switch settings.

Q: How many I/O modules can be installed?

A: The base module has 10 function module slots, but not all are available for I/O. A CPU occupies two slots, and extension configurations also reserve positions for extension modules. The actual I/O capacity depends on the system arrangement.

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