Allen-Bradley 1794-TB3 FLEX I/O Terminal Base Unit

SKU 1794-TB3

In stock

12-month warranty
Free returns within 30 days

Manufacturer: Allen-Bradley
Product No.: 1794-TB3
Country of origin:United States
Product Type: Terminal Base Unit
Payment: T/T, Western Union
Weight: 150g
Dimensions: 9.4 x 9.4 x 6.9 cm
Shipping port: Xiamen
Warranty: 12 months

Description

The Allen-Bradley 1794-TB3 is a FLEX I/O terminal base unit designed to provide secure termination points for field devices, sensors, and power supplies within a distributed modular I/O architecture. Functioning as the structural and electrical mounting foundation, this base unit mounts directly onto a standard DIN rail and physically hosts compatible Allen-Bradley FLEX I/O modules, bridging field-level wiring directly to the inter-module backplane communication and power bus.

Engineered to streamline cabinet wiring and maintenance, the 1794-TB3 features structured terminal rows that separate input and output signal lines from voltage common and supply connections. Its modular design allows individual I/O modules to be removed or replaced while maintaining field-side wiring integrity, significantly reducing Mean Time to Repair (MTTR) in continuous industrial automation environments.

Features

Screw clamp termination style for secure, vibration-resistant wire retention
Supports maximum conductor sizes up to 12 AWG (4 mm2) and minimum down to 22 AWG (0.35 mm2)
Integrated daisy-chain capability for efficient power distribution across adjacent terminal bases
Dedicated terminal rows separating 16 I/O connections, voltage common connections, and voltage supply connections
DIN rail mounting architecture for robust mechanical installation in standard control enclosures

Applications

Termination and signal routing for distributed FLEX I/O discrete and analog modules
Industrial machinery and process control cabinet wiring consolidation
Remote rack signal interfacing in complex manufacturing cells
Modular automation systems requiring hot-insertion and removal (RIUP) capabilities

Technical Specifications

Parameter	Specification
Brand	Allen-Bradley
Catalog Number	1794-TB3
Product Type	FLEX I/O Terminal Base Unit
Terminal Type	Screw Clamp
Maximum Voltage Rating	132 VAC / 125 VDC
Current Rating (Max)	10 A
Isolation Voltage	125V continuous (Basic insulation type)
Conductor Wire Size	22 to 12 AWG (0.35 to 4.0 mm2) solid or stranded
Mounting Type	DIN Rail (EN 50022 - 35 x 7.5 or 35 x 15 mm)
Enclosure Type Rating	None (Open-style module)
Country of Origin	United States

Compliance and Certifications

UL Listed Industrial Control Equipment
CE Compliant for applicable directives
c-UL-us Listed
CSA Certified
ODVA compliant for DeviceNet / ControlNet / EtherNet/IP distributed architectures

FAQ

What is the primary function of the Allen-Bradley 1794-TB3?

The 1794-TB3 is a terminal base unit for the Allen-Bradley FLEX I/O system, providing mechanical mounting and electrical field-wiring terminations for compatible I/O modules.

What type of wire terminations does the 1794-TB3 use?

This terminal base unit utilizes screw clamp connections, supporting solid or stranded copper wire ranging from 22 AWG to 12 AWG.

Does the 1794-TB3 support module replacement under power?

Yes, when used with compatible FLEX I/O backplanes and modules, the system supports Removal and Insertion Under Power (RIUP), allowing modules to be replaced without shutting down the entire rack.

What is the maximum voltage rating for the 1794-TB3?

The 1794-TB3 has a maximum voltage rating of 132 VAC / 125 VDC with a maximum continuous current capacity of 10 A.

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Shipping & Returns

Global Express Shipping

Standard Delivery: 4–6 business days via DHL, FedEx, and UPS.
Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
Worldwide Coverage: Serving over 150 countries.

Returns & Warranty

30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
12-Month Warranty: Every industrial component is backed by our technical warranty.

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Quantity

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Product Image	Model Number / Title	Condition	Availability	Action
	Allen-Bradley 1794-OB16P FLEX I/O Digital DC Output Module	Original New	In Stock	View Details

Global Express Shipping

Standard Delivery: 4-6 Business Days via DHL, FedEx, and UPS.
Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
Worldwide Coverage: Serving over 150 countries, including rapid delivery to Saudi Arabia and UAE.

Returns & Warranty

30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
12-Month Warranty: Every industrial component is backed by our professional technical warranty.

Orders are processed and delivered Monday-Friday (excluding public holidays).

For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .

TECHNICAL SPECIFICATIONS

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