Description

Yokogawa NFSB100-S50 SB Bus Repeat Module

Configured for SB Bus signal extension in the STARDOM FCN autonomous controller platform, the Yokogawa NFSB100-S50 (NFSB100 SB Bus Repeat Module) provides direct physical and electrical execution for local backplane communication expansion between FCN control and I/O extension units.

Suffix Breakdown & Model Matrix

Suffix Code	Definition
-S	Standard model
5	Non-explosion-protected specification
0	Standard environmental specification
/SBT01	T-joint connection accessory for SB Bus extension topology

Hardware Specifications

Parameter	Specification
Model	NFSB100-S50
Brand	Yokogawa Electric
Product Type	SB Bus Repeat Modules
Origin	Japan
Communication Bus	Yokogawa SB Bus
Transmission Speed	128 Mbps
Bus Extension Distance	Max. 8 m per line
Expansion Capacity	Up to 2 extension units
Redundancy Support	Dual module duplex configuration
Hot Swap Support	Supported during online operation
Supply Voltage	5 VDC (+/-5%) via backplane
Power Consumption	Max. 500 mA
Dimensions	32.8 mm x 130 mm x 142.5 mm
Weight	Approx.  0.4 kg
Operating Temp	0 degC to 55 degC
Humidity Range	5% to 95% RH non-condensing
Protection Rating	IP20
Mounting Format	Single-slot chassis module
Lead Time	1 to 3 working days
Warranty	1 year

Channel Isolation and SB Bus Communication Characteristics

The module operates as an intermediate SB Bus communication repeater between FCN control sections and downstream I/O expansion assemblies. Duplex deployment requires two modules installed in parallel rack positions for redundant communication path continuity.

Backplane communication is executed through deterministic serial bus transfer at 128 Mbps. The module supports online insertion and extraction during controller runtime provided the redundant communication path remains active.

The NFSB100-S50 supports integration with Yokogawa SB Bus T-joint hardware assemblies including /SBT01 and terminated /SBT02 configurations. Signal routing between adjacent cabinets should maintain isolated grounding continuity and separated high-noise power cable paths.

Frequently Asked Questions

Q: Does the NFSB100-S50 support online module replacement during operation?
A: Yes. The module supports hot-swappable insertion and extraction when deployed within an active redundant SB Bus configuration.

Q: What is the maximum local extension distance supported by the SB Bus line?
A: The module supports a maximum SB Bus extension length of 8 m per communication line between FCN rack assemblies.

Q: How is redundant communication implemented for the SB Bus?
A: Duplex communication is achieved by installing two NFSB100 modules in paired rack positions to maintain alternate bus path availability.

Field Installation Guidelines

Before installation, isolate chassis power and verify backplane connector alignment against FCN rack slot assignment documentation. Avoid excessive insertion force during module seating to prevent backplane pin deformation.

Route SB Bus extension cables separately from inverter output wiring, motor feeders, and high-current AC distribution lines. Shield continuity should remain bonded through cabinet grounding points without multiple earth reference loops.

For duplex installations, maintain identical cable lengths and equivalent routing geometry between redundant SB Bus paths. Verify T-joint termination selection before energizing the communication segment.

Specifications

• Brand: Yokogawa

Advantages

• High reliability in industrial environments
• Supports continuous operation
• Compatible with major PLC/DCS systems