NFSBT02 Yokogawa SB Bus T-Joint Connector

Yokogawa NFSBT02 SB Bus T-Joint Connector Terminal Block

Yokogawa NFSBT02 SB Bus T-Joint Connector Terminal Block

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Yokogawa NFSBT02 SB Bus T-Joint Connector Configured for signal termination and bus branching in CENTUM VP and ProSafe-RS control networks,...

رمز المنتج: NFSBT02

Manufacturer: Yokogawa
Product No.: NFSBT02
Product Type: Bus Interface Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 200g
Shipping port: Xiamen
Warranty: 12 months

وصف التقييمات

Yokogawa NFSBT02 SB Bus T-Joint Connector

Configured for signal termination and bus branching in CENTUM VP and ProSafe-RS control networks, the Yokogawa NFSBT02 (NFSBT02 SB Bus T-Joint Connector) provides direct physical/electrical execution. The hardware operates as a T-junction to branch communication paths from the main bus line while utilizing an integrated physical resistor to match the system characteristic impedance. By absorbing electrical wave reflections at the bus boundaries, this passive module maintains signal integrity across distributed field processing nodes.

Hardware Specifications

Parameter	Specification
Model	NFSBT02
Brand	Yokogawa
Origin	Japan
Weight	0.2 kg (Net: 0.2 kg to 0.3 kg depending on mounting hardware)
Dimensions	100 mm x 35 mm x 25 mm (Alternative physical envelope: 32 mm x 114 mm x 63 mm)
Operating Temp	-20 to +70 deg C
Power Consumption	Passive (Maximum voltage rating: 30 V DC, Rated current: 50 mA)
Termination Resistance	100 ohms +/- 1%
Insulation Resistance	> 100 M-ohms (at 500 V DC)
Dielectric Strength	500 V AC for 1 minute
Contact Resistance	< 20 m-ohms
Housing Material	Flame-retardant industrial-grade polycarbonate
Humidity Range	0 - 95% RH, non-condensing
Interface Type	Yokogawa SB Bus standard connector (T-type branching configuration)

DCS Interface & Channel Isolation

This bus branching hardware manages physical connection paths between field control stations and remote I/O sub-assemblies. The integration of the 100-ohm termination resistance prevents signal decay and standing wave generation on the SB bus lines. In compliance with high-integrity process control environments, the internal electrical layout features direct isolation barriers, maintaining isolation of 500 V AC to prevent ground loops from passing through the branch line to the primary bus network. It operates independently of the 4-20 mA HART loop protocol layer, focusing purely on high-speed digital bus termination.

Frequently Asked Questions

Q: Does this bus terminator require an external power supply to execute signal termination? A: No, the unit functions as a completely passive hardware device containing precision analog termination resistors, requiring no external supply voltage or backplane power.

Q: Can the branching connector be hot-swapped or disconnected during active bus communication? A: Disconnecting this module during active operations breaks the SB bus circuit and removes the termination resistance, causing signal reflections and potential communications loss across all nodes on that bus segment. Disconnections must only occur when the associated bus segment is offline.

Q: What is the purpose of the 100-ohm internal resistance? A: The 100-ohm internal resistance matches the characteristic impedance of the Yokogawa SB bus transmission lines, suppressing signal reflections that occur at the physical end of the cable runs.

Field Installation Guidelines

Terminator Placement: Mount this T-joint unit strictly at the physical end points of the SB bus network segment to ensure proper termination of line impedances.
Connector Alignment: Align the standard SB bus connector pinout carefully before insertion to avoid bending the contact pins, which can increase contact resistance above 20 m-ohms.
Cabinet Mounting: Secure the connector body using the standard mounting brackets to prevent vibration from stressing the connected SB bus cables.
Conduit Separation: Position the SB bus communication cables at least 300 mm away from high-voltage AC or motor drive wiring to minimize external electromagnetic noise injection into the branch lines.

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