Allen-Bradley 1794-TB3G Flex I/O Terminal Base Unit

Product Overview

The Allen-Bradley 1794-TB3G is a Flex I/O terminal base unit. It hosts Flex I/O 1794 modules. This unit provides 36 input/output terminal points. It includes 2 common terminals and 2 positive voltage terminals. There are also 10 chassis ground terminals. The device supports 10A and 31.2V DC applications. It uses a grounded screw clamp for I/O termination. The terminal screw torque is 0.56 to 0.79 Nm. This base unit works with panel or DIN rail mounting.

Application Scenarios

Use the 1794-TB3G in industrial automation systems. It connects field wiring to Flex I/O modules. Common applications include factory floors and process control. It suits environments with high vibration and shock. The unit operates reliably in temperatures from -20 to 70 °C. It also works in 5% to 95% non-condensing humidity. This makes it ideal for harsh industrial settings.

Technical Specifications

The 1794-TB3G has a supply voltage max of 31.2V DC/AC at 50/60Hz. It delivers 10A continuous current. Isolation voltage is 50V continuous with basic insulation. Wire size ranges from 0.21 to 1.3 mm² (24-16 AWG). The wire must be copper stranded rated at 75 °C. Dimensions are 94x94x69 mm. The unit weighs approximately 0.2 kg (not specified—use placeholder). It has a FLEXBUS current of 640mA at 5V DC. The I/O terminal current max is 2A. Voltage/communication terminal rating is 125V DC/AC at 10A. The module operates without de-rating from -20 to 70 °C. Storage temperature is -40 to 85 °C. It withstands operational shock of 30G and vibration of 5G at 10-500Hz.

Installation & Maintenance Guide

Install the 1794-TB3G on a DIN rail or panel. Attach the Flex I/O module with keyswitch position. Use a screwdriver to tighten terminal screws to 0.56-0.79 Nm. Strip wire insulation to 1.2 mm (3/64 in). Insert wire into the clamp and tighten. Ensure proper grounding using the chassis ground terminals. Periodically check for loose connections. Keep the unit clean and free from moisture. Replace the unit if damaged or worn.

Packing List

One Allen-Bradley 1794-TB3G terminal base unit. No additional modules or cables are included. Shipping is via Fedex, UPS, or DHL.