Products Description
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Allen-Bradley 1788-FBJB6 6-Way FOUNDATION Fieldbus Junction Box – Technical Specifications and FAQ
Technical Specifications
| Parameter | Specification |
|---|---|
| Brand | Allen-Bradley |
| Manufacturer | Rockwell Automation |
| Model | 1788-FBJB6 |
| Product Name | 6-Way Intelligent Fieldbus Junction Box |
| Product Type | FOUNDATION Fieldbus junction box |
| Supported Protocols | FOUNDATION Fieldbus H1 / PROFIBUS PA |
| Bus Input | 1 H1 media trunk input |
| Bus Output | 1 H1 media trunk output |
| Field Device Connections | 6 H1 media drop-line ports |
| Input Voltage | 12–32 V DC |
| Input Current | 0.5 A maximum |
| Trunk Output Voltage | 12–32 V DC |
| Trunk Output Current | 0.48 A |
| Drop Output Current | 40 mA per drop |
| Mounting | DIN rail |
| Enclosure Rating | Open-style; no IP protection rating |
| Isolation | No isolation between communication channels |
| Operating Temperature | 0 to +60°C (32 to +140°F) |
| Relative Humidity | 5–95%, non-condensing |
| Temperature Code | T4 |
| Terminal Wire Size | 0.205–0.823 mm² (24–18 AWG) |
| Terminal Torque | 0.5–0.6 N·m |
| Country of Origin | United Kingdom |
| UPC | 885630233383 |
| Lifecycle Status |
Discontinued
March 1, 2024 |
| Replacement | No planned direct Rockwell Automation replacement |
| Dimensions | 114.5 × 35.7 × 99 mm |
| Weight | Approx. 0.34 kg (0.75 lb), based on distributor data |
FAQ
FAQ
Q1: What is the Allen-Bradley 1788-FBJB6 used for?
A: It connects FOUNDATION Fieldbus H1 or PROFIBUS PA field devices to a fieldbus trunk network, distributing communication and power to multiple field-device connections.
Q2: How many field devices can the 1788-FBJB6 connect?
A: It provides six individual H1 media drop-line ports for connecting field devices.
Q3: What is the difference between 1788-FBJB6 and 1788-FBJB4R?
A: The 1788-FBJB6 provides six field-device connections, while the 1788-FBJB4R provides four connections and supports redundant fieldbus trunk arrangements.
Q4: Does the 1788-FBJB6 support short-circuit protection?
A: Yes. Each drop-line connection has current monitoring and limiting. A fault on one drop is limited to help keep other connected field devices operating.
Q5: What power supply does it require?
A: It requires a 12–32 V DC input supply rated at 0.5 A maximum. The trunk output supports up to 0.48 A, while each drop output is limited to 40 mA.
Q6: What is the operating temperature range?
A: The specified operating temperature range is 0 to +60°C (32 to +140°F).
Q7: Is the 1788-FBJB6 discontinued?
A: Yes. Rockwell Automation announced discontinuation effective March 1, 2024. No planned direct Rockwell replacement is listed.
Q8: What are the dimensions and weight for shipping?
A: Exact overall dimensions are not published by Rockwell. A distributor lists approximately 0.34 kg net weight. Confirm actual packing dimensions and gross weight before arranging international freight.
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Packing & Delivery
We will use wear-resistant cartons to seal the boxes, and take photos for your confirmation before sealing. We will pack the boxes only after confirmation.
For express delivery, we will use DHL, UPS, TNT, FedEx and EMS.
Please rest assured that we have a deep cooperation with express delivery companies and can ensure that your goods are delivered to you in good condition.
