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Foundation Fieldbus Junction Box

In process plants throughout the world, segment protectors and FieldBarriers are used as key components in the distribution of feldbus networks from the control room to the feld instruments. A trunk and spur topology is commonly used. In a typical feldbus installation, 10-12 feldbus devices are connected via one cable run that can span between 1500-1900 meters. This one cable supports power and communication to all the devices; therefore, it is recommended to use short circuit protection and energy limitation to isolate a fault condition from negatively affecting device communications on that segment. One device is connected to the output spur of a segment protector or FieldBarrier. Fieldbus junction boxes are installed close to the instruments in the feld in one of two ways depending on the location of the instrumentation:

NCS-JB105 Field Segment Protector (Fieldbus Junction Box)

The fieldbus junction box is used to connect FF H1 and Profibus PA devices to fieldbus, and it can be used as terminator at bus mainline and branch end.

• Dimension:210mm*75mm*160mm
• EMC:GB/T 18268-2000
• Protection Level: IP65

Features

• Short-circuit protection, isolate fault device, without affecting normal operation of other fieldbus devices.
• Install or remove fieldbus devices, without affecting normal operation of other fieldbus devices.
• Connect device to the fieldbus safely and fast.
• Reduce installation cost, simplify the electrical maintenance
• Water-proof and dust-proof case joint.
• Fieldbus input is regardless of polarity, so the user does not have to consider positive and negative problem of fieldbus devices.
• Each fieldbus junction box may connect six fieldbus devices at most.

Installation