AB Flex I/O Terminal Base Unit 1794-TB3 | 52-Terminal Screw Clamp

Product Overview

The 1794-TB3 is a terminal base unit from Allen-Bradley's Flex I/O platform. It provides termination points for I/O wiring and power supplies. This unit supports three terminal strips. The top strip has 16 terminals for I/O signals. The middle and bottom strips have 18 terminals each for common and voltage connections. The base supports daisy-chaining to nearby modules. It draws 640 mA at 5VDC from the backplane. The unit handles 120 VAC and up to 10 Amperes. The 1794-TB3 works with many 1794 I/O modules.

Application Scenarios

This terminal base is used in industrial automation systems. It hosts digital and analog I/O modules. Common applications include factory floor control, process automation, and machine control. The 1794-TB3 suits environments requiring modular I/O expansion. It simplifies wiring and maintenance for field devices.

Technical Specifications

Manufacturer: Rockwell Automation. Brand: Allen-Bradley. Series: Flex I/O. Voltage rating: 120 VAC max. Current capacity: 10 Amperes max. Backplane current: 640 mA at 5VDC. Terminal strips: Three. Number of terminals: 52. Screw torque: 0.56-0.79 Nm. Wire size: 0.34-3.3 mm². Isolation voltage: 125V continuous. Dimensions: 94x94x69 mm. Mounting: DIN Rail. Compatible modules: 1794-IA8, 1794-IA16, 1794-OA8, and many more. The terminal base has screw clamp connections for secure wiring.

Installation & Maintenance Guide

Mount the 1794-TB3 on a DIN rail. Hook the top over the rail and push to lock. Ensure the FlexBus connector engages with the adapter. Use screw clamp terminals for wiring. Tighten to 0.56-0.79 Nm. For daisy-chaining, connect supply in at C-34(+) and B-16(-). Supply out at C-51(+) and B-33(-). Regularly check terminal tightness for reliable operation.

Packing List

1 x 1794-TB3 Terminal Base Unit. 1 x Installation manual. No additional accessories included. Shipping via FedEx, UPS, or DHL.