Product Introduction
The Allen Bradley 1794-TBNF Flex I/O Terminal Base Unit is a fused terminal base designed to provide enhanced protection and reliable wiring for FLEX I/O systems. It acts as the connection interface between I/O modules and field devices while integrating fuse protection to safeguard circuits against overcurrent conditions.
This model supports 16 I/O terminals along with 2 common terminals and 2 +voltage terminals, offering a practical configuration for general industrial control applications. The built-in fuse feature is particularly valuable in protecting sensitive equipment and minimizing the risk of damage caused by electrical faults.
Equipped with screw-clamp terminals, the 1794-TBNF ensures secure and stable connections, while supporting wire sizes from 22 to 12 AWG. Its open-style construction and DIN rail mounting design allow for easy installation, inspection, and maintenance in control panels. This unit is widely used in automation systems where both wiring reliability and circuit protection are essential.
Product Specifications
| Parameter |
Value |
| Product Type |
Flex I/O Terminal Base Unit |
| System Compatibility |
Allen Bradley FLEX I/O System |
| Total I/O Terminals |
16 |
| Common Terminals |
2 |
| +Voltage Terminals |
2 |
| Terminal Type |
Screw Clamp |
| Wire Size |
22–12 AWG |
| Protection Type |
Fused |
| Rated Current |
10 A |
| Rated Voltage |
250 VAC/DC |
| Mounting Type |
DIN Rail Mount |
| Style |
Open Style |
| Ingress Protection |
IP20 |
| Dimensions |
94 × 94 × 69 mm |
| Weight |
0.2 kg |
Applications
• Industrial control systems requiring integrated circuit protection
• Distributed I/O systems with sensitive field devices
• Factory automation for safe and reliable signal and power distribution
• Process control applications where overcurrent protection is critical
• Control panel installations using DIN rail mounting
• Suitable for manufacturing, energy, and process industries
Advantages
• Integrated fuse protection enhances system safety and prevents damage from overcurrent
• Screw-clamp terminals ensure secure and vibration-resistant connections
• Wide wire compatibility (22–12 AWG) supports flexible field wiring
• Reliable electrical performance for both signal and power connections
• Open-style design allows easy inspection and maintenance
• DIN rail mounting simplifies installation and panel organization
FAQ
1. What is the main function of the 1794-TBNF terminal base?
It provides wiring connections for FLEX I/O modules while offering built-in fuse protection for connected circuits.
2. How does the fused design improve system safety?
The fuse protects circuits by interrupting current flow during overload or fault conditions, preventing equipment damage.
3. What type of wiring does this unit support?
It supports wire sizes ranging from 22 to 12 AWG for flexible field connections.
4. What is the current and voltage rating of this unit?
It is rated for 10 A and supports up to 250 VAC/DC operation.
5. Is it suitable for protecting sensitive devices?
Yes, the integrated fuse makes it ideal for applications where equipment protection is important.
6. How is the unit installed in a control panel?
It is mounted on a standard DIN rail for easy and organized installation.
7. Can it be used with all FLEX I/O modules?
It is compatible with most FLEX I/O modules, but specific compatibility should be confirmed.
8. What maintenance is required for the fused terminal base?
Periodic inspection of wiring and fuse condition is recommended to ensure proper protection.
9. Does the open-style design affect safety?
No, it complies with IP20 standards, providing protection against accidental contact while allowing accessibility.
10. What are the main benefits of using this model?
It combines reliable wiring, integrated protection, easy installation, and strong compatibility within FLEX I/O systems.
Related Models
| Model |
Description |
| 1794-TBN |
Standard Terminal Base Unit |
| 1794-TB2 |
16-Point Terminal Base |
| 1794-TB3 |
Standard FLEX I/O Terminal Base |
| 1794-TB3S |
Spring-Clamp Terminal Base |
| 1794-TB32 |
32-Point Terminal Base |
| 1794-TB37DS |
D-Shell Connector Terminal Base |
Popular Models
| Model |
Description |
| 1794-IB16 |
FLEX I/O 16-Channel Input Module |
| 1794-OB16 |
FLEX I/O 16-Channel Output Module |
| 1794-IA16 |
FLEX I/O Analog Input Module |
| 1794-OA16 |
FLEX I/O Analog Output Module |
| 1794-IB8 |
FLEX I/O 8-Channel Input Module |
| 1794-OB8 |
FLEX I/O 8-Channel Output Module |
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