Allen-Bradley 1788-FBJB6 1788 Linking Devices 6-Way Foundation Fieldbus Junction Box

Product Overview

The Allen-Bradley 1788-FBJB6 functions as a high-density FOUNDATION Fieldbus H1 junction box within the 1788 Linking Devices infrastructure series. This hardware component splits a main network trunk line into six independent, current-limited H1 instrument drops, connecting field transmitters, valves, and actuators directly to the control network layer. We distribute this network asset exclusively in 100% brand new, original factory condition to guarantee full internal terminal plating integrity, prevent signal attenuation over long cable segments, and eliminate diagnostic data loss across your process control loops.

Technical Specifications

Engineering Advantages

• Isolates Faulty Field Drops Intermittently: The internal electronic circuitry monitors each of the six H1 media drops independently. If a field instrument shorts out or suffers a water intrusion failure, the junction box limits the affected branch current to 40 mA, preventing the localized short circuit from collapsing the main network trunk power or disrupting the remaining active field devices.

• Simplifies Dual-Choice Structural Mounting: The compact 0.75 lbs physical frame accommodates standard 35mm DIN rail snapping or direct panel surface-mount screw installation. This structural adaptability allows control engineers to mount the junction box inside shallow marshalling cabinets, remote terminal enclosures, or localized junction boxes directly adjacent to the processing skid.

• Eliminates Inductive Cable Noise Accumulation: The optimized internal bus-bar architecture maintains strict differential signaling parameters across the trunk and drop pathways. This structural design rejects high-frequency electromagnetic interference (EMI) generated by nearby power cables and variable frequency drives, ensuring clean data transfers up to altitudes of 2000 meters.

• Secures Field Conductors Against Heavy Machinery Vibrations: The heavy-duty screw terminals withstand a continuous torque pressure of 0.5 to 0.6 Nm. Tightening the terminals to this factory metric establishes a gas-tight electrical contact that resists wire backing-out, maintaining loop stability through constant 15 G physical operating shocks on heavy shaker and compressor decks.

FAQs

• Can I use the trunk output port to daisy-chain multiple 1788-FBJB6 junction boxes together?

  Yes. The 1788-FBJB6 provides a dedicated trunk output port rated up to 0.48 Amps. You can route the primary Fieldbus cable into the trunk input and run an extension out of the trunk output to power a downstream junction box, provided total network loop calculations stay within the 480 mA electrical ceiling.

• Is this Fieldbus device a surplus asset or an authentic factory-new component?

  We guarantee this product is 100% brand new, authentic, and completely unused original factory stock. It arrives inside its native manufacturer packaging with unblemished circuit terminals, untouched industrial housing surfaces, and matching tracking barcodes completely intact.

• Does this IP20 junction box require an external enclosure for outdoor processing areas?

  Yes. The native IP20 rating provides finger-safe internal contact protection but does not seal out rain, airborne salts, or corrosive chemical fumes. For outdoor environments or washdown areas, always mount the 1788-FBJB6 inside a properly rated NEMA 4X or IP66 weatherproof field enclosure.