Allen-Bradley 1794-OA16 Flex I/O Terminal Base Unit - 52-Terminal

Product Overview

The Allen-Bradley 1794-TB3 is a Flex I/O Terminal Base Unit. It provides termination points for field devices and power supplies. This unit hosts a variety of Flex I/O modules. It has three terminal strips with 52 screw clamp terminals. The top strip holds 16 I/O terminals. The middle and bottom strips have 18 terminals each for common and supply. Daisy-chaining is supported for nearby modules. The unit draws 640 mA at 5VDC from the backplane. It handles 120 VAC at 10 Amperes maximum.

Application Scenarios

Use the 1794-TB3 in industrial automation systems. It connects digital and analog I/O modules to field devices. Common applications include manufacturing plants, process control, and material handling. The terminal base is ideal for building distributed I/O racks. It works with many Allen-Bradley communication adapters. Modules like 1794-IA8, 1794-OA16, and 1794-IB8 fit directly onto this base.

Technical Specifications

Manufacturer: Rockwell Automation. Brand: Allen-Bradley. Module Type: Terminal Base Unit. Number of Terminals: 52. Terminal Strips: Three. Connection Type: Screw clamp. Wire Size: 0.34 to 3.3 mm². Conductor Max: 12 AWG. Isolation Voltage: 125V continuous. Backplane Current: 640 mA at 5VDC. Voltage Rating: 120 VAC. Current Capacity: 10 Amperes. Dimensions: 94 x 94 x 69 mm. Terminal Screw Torque: 0.56 to 0.79 Nm. Compatible with 1794 series modules. Daisy-chaining is supported.

Installation & Maintenance Guide

Install on a DIN rail. Hook the top of the unit over the rail. Push the bottom until it locks. Slide it tight against the adjacent adapter. The FlexBus connector must engage. Use the screw terminals for wire connections. Torque screws to 0.56-0.79 Nm. For daisy-chaining, use terminals C-34 and B-16 for supply in. Use terminals C-51 and B-33 for supply out. Regular inspection of connections is recommended. Keep the unit free from dust and moisture.

Packing List

One Allen-Bradley 1794-TB3 Terminal Base Unit. No additional accessories included. Shipping via FedEx, UPS, or DHL. The unit is packed securely to prevent damage.