| Manufacturer | Allen Bradley |
|---|---|
| Product Type | Flex I/O Terminal Base Unit |
| Product Line | Flex I/O 1794 |
| Part Number | 1794-TB3S |
| Weight | 0.50 lbs (0.23 kg) |
| Terminal Screw Torque | 0.56-0.79 Nm |
| Supply Voltage Range max. | 125V DC/AC, 50/60Hz, 10A |
| Isolation Voltage | 125V Continuous |
| Voltage Rating | 24V DC/AC, 120V DC/AC |
| Wire Size | 0.34-3.3mm^3 |
Overview
The Allen-Bradley 1794-TB3S is the essential mounting and wiring interface for the Rockwell Automation FLEX I/O system. Serving as the physical backbone of your distributed I/O station, this terminal base allows you to securely mount 1794 series modules onto a standard DIN rail. The “S” in the model number denotes the use of spring clamp terminals, which provide a gas-tight, vibration-resistant connection that is crucial for harsh industrial environments.
Key Features & Benefits
- Spring Clamp Technology: The 1794-TB3S utilizes screwless spring clamp terminals, allowing for fast, tool-free wiring (with appropriate ferrules) or easy tool-assisted insertion. This significantly reduces installation time and ensures connections remain tight despite vibration.
- Universal Compatibility: Designed to accept a wide variety of 1794 FLEX I/O modules, including digital I/O, analog I/O, and specialty modules. This versatility makes it a standard component in countless control panels.
- DIN Rail Mounting: Easily snaps onto standard 35mm DIN rails, providing a secure and organized mounting solution for your automation hardware.
- Easy Maintenance: The design allows I/O modules to be plugged and unplugged from the base without disturbing the field wiring. This “hot-swap” capability (where applicable) minimizes downtime during repairs or upgrades.
- High-Density Wiring: With 10 connection points (plus power/ground terminals depending on configuration), it supports the dense wiring requirements of modern compact control systems.
- Durable Construction: Made from high-strength, flame-retardant plastic, the 1794-TB3S withstands the rigors of industrial environments, including extreme temperatures and electrical noise.
Applications
The Allen-Bradley 1794-TB3S is used in virtually every application involving FLEX I/O, including:
- Factory Automation: Mounting digital and analog modules for machine control.
- Process Industries: Connecting sensors and actuators in water treatment and chemical plants.
- Material Handling: Wiring conveyor systems and sorting equipment.
- OEM Machinery: Providing a modular and serviceable I/O interface for machine builders.
Important Installation Note:
The 1794-TB3S is a Terminal Base only; it does not include the I/O module itself. You must purchase the corresponding 1794 I/O module (e.g., 1794-IB16, 1794-OB16, 1794-IE8) separately. Ensure the field wiring matches the pinout diagram provided with your specific I/O module.
Why Choose This Terminal Base?
Our 1794-TB3S units are sourced from authorized distributors, guaranteeing genuine Allen-Bradley / Rockwell Automation quality. Whether you are building a new panel or replacing a damaged base, the 1794-TB3S offers the durability and ease-of-use required for professional installations. We provide fast shipping and reliable customer support.
