Product Introduction
The Allen Bradley 1794-TB3T Flex I/O Terminal Base Unit is a specialized terminal base designed specifically for temperature measurement applications within the FLEX I/O system. It is optimized for use with temperature modules, supporting 3-wire configurations that enhance measurement accuracy and stability in industrial environments.
This terminal base utilizes cage clamp connection technology, providing secure and vibration-resistant wiring while allowing efficient installation. The 3-wire design is particularly beneficial for resistance temperature detectors (RTDs), as it helps compensate for lead resistance and improves signal precision.
With support for FLEXBUS power distribution at 5 VDC / 640 mA and compatibility with 125 VAC/VDC systems, the 1794-TB3T ensures reliable performance across a wide range of control applications. Its open-style structure and DIN rail mounting capability make it easy to integrate into control panels, especially in systems focused on temperature monitoring and process control.
Product Specifications
| Parameter |
Value |
| Product Type |
Flex I/O Terminal Base Unit |
| System Compatibility |
Allen Bradley FLEX I/O System |
| Application Type |
Temperature Modules (3-Wire Configuration) |
| Wiring Type |
3-Wire for RTD/Temperature Sensors |
| Terminal Type |
Cage Clamp |
| FlexBus Power |
5 VDC / 640 mA |
| Rated Voltage |
125 VAC/VDC |
| Frequency |
50/60 Hz |
| Mounting Type |
DIN Rail Mount |
| Style |
Open Style |
| Ingress Protection |
IP20 |
| Dimensions |
94 × 94 × 69 mm |
| Weight |
0.28 kg |
Applications
• Temperature measurement systems using RTDs and temperature sensors
• Process control applications requiring accurate thermal monitoring
• Industrial automation systems with dedicated temperature modules
• Energy and power plants for equipment temperature supervision
• Chemical and manufacturing processes where temperature stability is critical
• Suitable for distributed I/O systems requiring precise and reliable temperature signal handling
Advantages
• Optimized for 3-wire temperature measurement improving accuracy by compensating lead resistance
• Cage clamp terminals ensure secure and vibration-resistant connections
• Stable FlexBus power support enables reliable module operation
• High compatibility with FLEX I/O temperature modules
• Open-style design allows easy inspection and maintenance
• DIN rail mounting simplifies installation and system integration
FAQ
1. What is the main purpose of the 1794-TB3T terminal base?
It is designed to interface FLEX I/O temperature modules with field temperature sensors, especially in 3-wire configurations.
2. Why is a 3-wire configuration used for temperature measurement?
It compensates for lead resistance in RTDs, improving measurement accuracy compared to 2-wire systems.
3. What types of sensors can be connected to this unit?
It is primarily used with RTDs and other temperature sensors supported by FLEX I/O temperature modules.
4. What is the benefit of cage clamp terminals?
They provide secure connections, resist vibration, and simplify installation compared to traditional screw terminals.
5. How does FlexBus power support the system?
It supplies power to connected modules, ensuring stable operation within the FLEX I/O system.
6. Is this unit suitable for high-precision applications?
Yes, its design specifically supports accurate temperature measurement in industrial environments.
7. How is the unit installed in a control panel?
It is mounted on a standard DIN rail, making installation quick and standardized.
8. Can it be used with non-temperature modules?
It is specifically optimized for temperature modules, and use with other modules is generally not recommended.
9. What maintenance is required?
Minimal maintenance is needed; periodic inspection of wiring connections is sufficient.
10. What makes this model different from standard terminal bases?
Its dedicated 3-wire configuration and optimization for temperature modules make it ideal for precise thermal monitoring applications.
Related Models
| Model |
Description |
| 1794-TB3S |
Spring-Clamp Terminal Base Unit |
| 1794-TB3G |
Grounded Terminal Base Unit |
| 1794-TB3 |
Standard Flex I/O Terminal Base |
| 1794-TB32 |
32-Point Terminal Base |
| 1794-TB32S |
Spring-Clamp 32-Point Terminal Base |
| 1794-TB37DS |
D-Shell Connector Terminal Base |
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