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  • Allen Bradley 1794-TB3S FLEX I/O terminal base unit
  • Allen Bradley 1794-TB3S FLEX I/O terminal base unit
  • Allen Bradley 1794-TB3S FLEX I/O terminal base unit
  • Allen Bradley 1794-TB3S FLEX I/O terminal base unit
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Allen Bradley 1794-TB3S FLEX I/O terminal base unit

  • Allen Bradley
  • USA
  • 2024
  • In Stock
The Allen-Bradley 1794-TB3S is a FLEX I/O terminal base unit designed for industrial automation systems. Allen Bradley 1794-TB3S (1794-TB3S FLEX I/O terminal base unit) serves as a mounting point and wiring interface for various I/O modules, providing a compact and flexible solution for PLC configurations.
Annex

Allen Bradley 1794-TB3S Technical Data


■ IDENTIFICATION

Product Name: FLEX I/O Terminal Base Unit

Catalog Number: 1794-TB3S

Terminal Type: Spring Clamp (Cage Clamp)

■ TERMINATION & CAPACITY

I/O Terminals: 16 (Points 0 to 15)

Common Terminals: 18 (Internally connected)

Voltage Terminals: 18 (Internally connected, +V)

Current Capacity: 2A per I/O | 10A total for V/COM

■ ELECTRICAL & ISOLATION

Supply Voltage: 125V AC/DC (50/60 Hz)

Isolation: 125V Continuous (Basic Insulation)

■ INSTALLATION & WIRING

Wire Size: 0.34 to 3.3 mm² (22 to 12 AWG)

Strip Length: 5 to 6 mm (0.20 to 0.24 in.)

Mounting: 35 x 7.5 mm DIN Rail

Protection: IP20 (Open-style)

Operating Temp: 0°C to 55°C (32°F to 131°F)

Allen Bradley 1794-TB3S


Allen Bradley 1794-TB3S Overview


Allen Bradley 1794-TB3S Features

  • Spring-Clamp Termination: 1794-TB3S FLEX I/O terminal base unit provides faster, more reliable wiring compared to screw terminals; offers superior resistance to vibration and shock in harsh industrial environments.

  • High Density Wiring: 1794-TB3S FLEX I/O terminal base unit features 16 I/O points with 18 common and 18 voltage terminals, eliminating the need for external terminal blocks for 3-wire devices.

  • Hot-Swap Capability: 1794-TB3S FLEX I/O terminal base unit supports "Removal and Insertion Under Power" (RIUP), allowing modules to be replaced without disturbing the field wiring or system power.

  • Flexible Mounting: Compact design supports both horizontal and vertical DIN-rail mounting, maximizing cabinet space efficiency.

  • Robust Isolation: 1794-TB3S FLEX I/O terminal base unit provides 125V continuous isolation between field-side wiring and the Flexbus backplane for enhanced system protection.

  • Simplified Troubleshooting: Clear terminal numbering and accessible test points simplify maintenance and signal verification.

Allen Bradley 1794-TB3S Application

  • Distributed I/O Systems: Allen Bradley FLEX I/O terminal base unit is ideal for decentralized control architectures where I/O needs to be located close to sensors and actuators.

  • High-Vibration Machinery: Allen Bradley FLEX I/O terminal base unit is extensively used in packaging, material handling, and automotive assembly lines where mechanical vibration is a concern.

  • 3-Wire Sensor Integration: 1794-TB3S Allen Bradley is perfect for connecting 3-wire proximity switches, photoelectric sensors, and limit switches without additional hardware.

  • Space-Constrained Cabinets: 1794-TB3S Allen Bradley is used in compact control panels where high-density I/O termination is required within a small footprint.

  • Process Automation: 1794-TB3S Allen Bradley is suitable for water treatment, food and beverage, and chemical processing plants requiring reliable 125V AC/DC signal distribution.


If you want to more details about Allen Bradley 1794-TB3S，please contact me without hesitate.Email：sales@sparecenter.com


Allen Bradley 1794-TB3S Pictures and FAQ


1794-TB3S

Allen Bradley FLEX I/O terminal base unit

1794-TB3S FLEX I/O terminal base unit

Allen Bradley FLEX I/O terminal base unit

Allen Bradley 1794-TB3S

Allen Bradley FLEX I/O terminal base unit

Q: What is the primary function of the 1794-TB3S in a FLEX I/O system?
A: The 1794-TB3S Allen Bradley serves as a specialized terminal base unit that provides the physical mounting platform and electrical wiring interface for various FLEX I/O modules.
Q: How does the termination technology of the 1794-TB3S improve installation efficiency?
A: The 1794-TB3S Allen Bradley utilizes spring-clamp (cage clamp) terminals, which allow for significantly faster wire insertion and removal compared to standard screw-type terminal bases.
Q: Why is the 1794-TB3S considered a more reliable choice for high-vibration industrial environments?
A: The spring-loaded mechanism within the 1794-TB3S Allen Bradley maintains constant pressure on the wire, ensuring that connections do not loosen even when subjected to continuous mechanical shock or vibration.
Q: Does the 1794-TB3S eliminate the need for external distribution blocks when using 3-wire sensors?
A: Yes, because the 1794-TB3S Allen Bradley provides 18 common and 18 voltage terminals, it allows for the direct connection of 3-wire field devices without the need for additional external hardware.
Q: Can an I/O module be swapped safely while the 1794-TB3S is under power?
A: The 1794-TB3S is fully compatible with Removal and Insertion Under Power (RIUP) procedures, allowing for module maintenance or replacement without disrupting field wiring or shutting down system power.
Q: What are the specific electrical current capacities for the 1794-TB3S?
A: Each I/O terminal on the 1794-TB3S Allen Bradley can handle up to 2A, while the overall current capacity for the combined voltage and common buses of the 1794-TB3S is rated at 10A.
Q: Which specific Allen-Bradley modules can be utilized with the 1794-TB3S?
A: The Allen Bradley 1794-TB3S is highly versatile and supports most FLEX I/O digital, analog, and specialty modules, including popular units like the 1794-IB16, 1794-OB16, and 1794-IE8.
Q: What are the enclosure requirements for safely operating the 1794-TB3S?
A: Since the Allen Bradley 1794-TB3S is an open-style, IP20-rated component, it must be installed within a protective industrial enclosure and mounted on a standard 35mm DIN rail.


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1794-TB3S

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