Genuine Allen-Bradley 1794-TBNF Allen-Bradley FLEX I/O (1794 Series) - Industrial Automation Part

Allen-Bradley 1794-TBNF Fused Terminal Base | FLEX I/O Series

SKU: 1794-TBNF Category: Allen-Bradley Tags: 1794-TBNF, Allen-Bradley, FLEX I/O, Industrial Automation, Terminal Base

Description

Allen-Bradley 1794-TBNF Fused Terminal Base – FLEX I/O Series

Imagine a critical production line suddenly halting because a field wiring fault propagates undetected into the I/O backplane — taking down an entire FLEX I/O rack and triggering an unplanned shutdown that costs thousands of dollars per hour. Without a dedicated fused terminal base, a single overcurrent event in one field circuit can cascade into a system-wide failure. The Allen-Bradley 1794-TBNF Fused Terminal Base is engineered precisely to prevent this scenario: it provides individual fuse protection at the terminal level, isolating field-side faults before they can compromise the I/O module or the controller network.

Within the Allen-Bradley FLEX I/O 1794 product family — one of the most widely deployed distributed I/O platforms in global discrete and process manufacturing — the 1794-TBNF occupies a specialized but essential role. While standard terminal bases (such as the 1794-TB3 or 1794-TB32) provide straightforward field wiring connectivity, the TBNF variant adds integrated fuse holders directly on the terminal base, making it the preferred choice for applications where field device protection and NEC/IEC compliance demand individual circuit overcurrent protection. It is trusted by system integrators and OEMs across automotive, food & beverage, oil & gas, and water treatment industries worldwide.

Technical Specifications

Part Number: 1794-TBNF
Series: Allen-Bradley FLEX I/O (1794 Series)
Type: Fused Terminal Base
Compatible Module Types: FLEX I/O digital and analog I/O modules (1794 series)
Fuse Type: Individual field-circuit fuse holders (fuses field-replaceable)
Wiring Style: Screw-terminal field wiring connections
Mounting: DIN rail mount, compatible with standard FLEX I/O adapter and power supply assemblies
Weight: Approx. 200 g
Manufacturer: Rockwell Automation / Allen-Bradley

Note: Always refer to the official Rockwell Automation 1794-TBNF installation instructions and product specifications sheet for complete electrical ratings and compliance data before installation.

Key Features & Benefits

Individual Circuit Fuse Protection: Each field output circuit is protected by a dedicated fuse, preventing a single fault from disabling the entire I/O module or rack.
Field-Replaceable Fuses: Maintenance technicians can replace blown fuses at the terminal base without removing the I/O module, minimizing downtime.
Seamless FLEX I/O Integration: Designed as a drop-in component within the 1794 FLEX I/O ecosystem — no additional adapters or wiring modifications required.
Compliance-Ready Design: Supports NEC and IEC overcurrent protection requirements for field device wiring, simplifying panel certification.
Compact DIN Rail Form Factor: Maintains the space-efficient FLEX I/O profile, suitable for compact control panels and distributed junction boxes.
Robust Screw-Terminal Connections: Industrial-grade terminals ensure reliable, vibration-resistant field wiring in demanding environments.

Industry & Equipment Applications

Automotive Manufacturing: Body welding lines, paint shop conveyors, and assembly robots where output short-circuit protection is mandatory.
Food & Beverage Processing: Filling, capping, and packaging machines requiring hygienic panel designs with individual circuit protection.
Oil & Gas: Wellhead control panels and pipeline SCADA RTUs where field wiring runs long distances and fault isolation is critical.
Water & Wastewater Treatment: Pump control panels and valve actuator networks in wet, corrosive environments.
Material Handling & Logistics: Conveyor sortation systems and automated storage/retrieval systems (AS/RS) with high I/O density.
OEM Machine Builders: Any machine requiring UL/CE panel certification with documented overcurrent protection at each field output.

System Integration & Compatible Parts

The 1794-TBNF is designed to work within the complete Allen-Bradley FLEX I/O architecture. Commonly paired components include:

FLEX I/O Adapters: 1794-AENT (EtherNet/IP), 1794-ADN (DeviceNet), 1794-APB (PROFIBUS)
FLEX I/O Power Supplies: 1794-PS13, 1794-PS1
Digital Output Modules: 1794-OB16, 1794-OB32 — modules most commonly requiring fused terminal bases
Digital Input Modules: 1794-IB16, 1794-IB32
Analog I/O Modules: 1794-IE8, 1794-OE4
Standard Terminal Bases (non-fused): 1794-TB3, 1794-TB32 — for comparison when fuse protection is not required

Contact Konmask.com to source complete FLEX I/O rack assemblies or individual replacement components.

Our Quality Assurance Process

Source Verification: All Allen-Bradley parts are sourced from authorized distributors or verified surplus channels with full traceability documentation.
Visual & Physical Inspection: Each unit is inspected for label integrity, connector condition, housing damage, and counterfeit indicators before dispatch.
Functional Testing (where applicable): Modules and terminal bases are bench-tested against known-good reference systems prior to shipment.
Secure Packaging: ESD-safe packaging with moisture barrier bags and rigid outer cartons to prevent transit damage.
Documentation: Certificate of conformance and inspection report available upon request.

How to Order

Submit an inquiry via the Contact / RFQ form on this page or email support@konmask.com.
Provide your required quantity, delivery timeline, and destination country.
Our team will respond with availability confirmation, lead time, and a formal quotation within 1 business day.
Upon PO confirmation, we arrange shipment via DHL / FedEx / UPS with full tracking and export documentation.

Why Choose Konmask.com?

✅ Specialized in Industrial Automation Components — PLC modules, DCS parts, drives, and I/O systems from leading global brands.
✅ Global Sourcing Network — Access to both current-production and legacy/obsolete parts that are difficult to source through standard channels.
✅ B2B-Focused Service — Dedicated account support for system integrators, OEMs, MRO teams, and engineering firms.
✅ Fast Response — RFQ responses within 24 hours; urgent orders accommodated.
✅ Transparent Quality Process — Full inspection documentation and traceability on every order.
✅ Competitive Pricing — Direct sourcing relationships enable pricing advantages versus traditional distribution.

Frequently Asked Questions

Q: What is the difference between the 1794-TBNF and the 1794-TB3?
A: The 1794-TBNF includes integrated fuse holders for individual field circuit overcurrent protection, while the 1794-TB3 is a standard terminal base without fusing. The TBNF is required when NEC/IEC compliance mandates individual output circuit protection.

Q: What fuse type and rating does the 1794-TBNF use?
A: The 1794-TBNF uses standard miniature fuses in its field-circuit holders. Refer to the Rockwell Automation product specifications and your application’s load current to select the correct fuse rating. Contact us if you need guidance on fuse selection.

Q: Is the 1794-TBNF compatible with all FLEX I/O modules?
A: The 1794-TBNF is compatible with the standard FLEX I/O 1794-series digital and analog I/O modules. Always verify compatibility with the specific module part number using the Rockwell Automation compatibility tool or contact our technical team.

Q: Can I order the 1794-TBNF as part of a complete FLEX I/O rack assembly?
A: Yes. Konmask.com can source and supply complete FLEX I/O assemblies including adapters, power supplies, I/O modules, and terminal bases. Submit an RFQ with your full BOM for a consolidated quotation.

Q: Do you provide export documentation for international shipments?
A: Yes. We provide commercial invoices, packing lists, and certificates of conformance. Country-of-origin documentation is available upon request.

Q: What is your lead time for the 1794-TBNF?
A: Lead time depends on current stock levels. In-stock units typically ship within 2–3 business days. For out-of-stock items, our sourcing team will provide an estimated lead time with your quotation.

{
“@context”: “https://schema.org”,
“@graph”: [
{
“@type”: “Product”,
“name”: “Allen-Bradley 1794-TBNF Fused Terminal Base”,
“description”: “Allen-Bradley 1794-TBNF FLEX I/O Fused Terminal Base with individual field-circuit fuse protection. Compatible with 1794-series digital and analog I/O modules. Sourced and supplied by Konmask.com.”,
“sku”: “1794-TBNF”,
“mpn”: “1794-TBNF”,
“brand”: {
“@type”: “Brand”,
“name”: “Allen-Bradley”
},
“manufacturer”: {
“@type”: “Organization”,
“name”: “Rockwell Automation”
},
“category”: “Industrial Automation / FLEX I/O Terminal Base”,
“url”: “https://konmask.com/products/allen-bradley-1794-tbnf-fused-terminal-base-flex-io”,
“offers”: {
“@type”: “Offer”,
“seller”: {
“@type”: “Organization”,
“name”: “Konmask.com”,
“url”: “https://konmask.com”
},
“availability”: “https://schema.org/InStock”,
“priceCurrency”: “USD”,
“priceSpecification”: {
“@type”: “PriceSpecification”,
“description”: “Price available upon request. Submit RFQ at konmask.com.”
},
“itemCondition”: “https://schema.org/NewCondition”
}
},
{
“@type”: “FAQPage”,
“mainEntity”: [
{
“@type”: “Question”,
“name”: “What is the difference between the 1794-TBNF and the 1794-TB3?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “The 1794-TBNF includes integrated fuse holders for individual field circuit overcurrent protection, while the 1794-TB3 is a standard terminal base without fusing. The TBNF is required when NEC/IEC compliance mandates individual output circuit protection.”
}
},
{
“@type”: “Question”,
“name”: “What fuse type and rating does the 1794-TBNF use?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “The 1794-TBNF uses standard miniature fuses in its field-circuit holders. Refer to the Rockwell Automation product specifications and your application load current to select the correct fuse rating.”
}
},
{
“@type”: “Question”,
“name”: “Is the 1794-TBNF compatible with all FLEX I/O modules?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “The 1794-TBNF is compatible with standard FLEX I/O 1794-series digital and analog I/O modules. Always verify compatibility with the specific module part number using the Rockwell Automation compatibility tool.”
}
},
{
“@type”: “Question”,
“name”: “Can I order the 1794-TBNF as part of a complete FLEX I/O rack assembly?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “Yes. Konmask.com can source and supply complete FLEX I/O assemblies including adapters, power supplies, I/O modules, and terminal bases. Submit an RFQ with your full BOM for a consolidated quotation.”
}
},
{
“@type”: “Question”,
“name”: “Do you provide export documentation for international shipments?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “Yes. We provide commercial invoices, packing lists, and certificates of conformance. Country-of-origin documentation is available upon request.”
}
},
{
“@type”: “Question”,
“name”: “What is your lead time for the 1794-TBNF?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “Lead time depends on current stock levels. In-stock units typically ship within 2–3 business days. For out-of-stock items, our sourcing team will provide an estimated lead time with your quotation.”
}
}
] }
] }

Allen-Bradley 1794-TBNF Fused Terminal Base | FLEX I/O Series