Flex I/O Terminal Base Unit Allen-Bradley 1794-TB3G 36 Points

Product Overview

The Allen-Bradley 1794-TB3G is a Flex I/O terminal base unit. It hosts compatible 1794 series I/O modules. This unit provides 36 screw-clamp terminals for field wiring. It includes 2 common terminals and 2 positive voltage terminals. Ten chassis ground terminals ensure safe operation. The base mounts on a panel or DIN rail. It works with 10A and 31.2V DC/AC supplies. The 1794-TB3G delivers a FLEXBUS current of 640 mA at 5V DC. Its robust design suits harsh industrial environments.

Application Scenarios

Use the 1794-TB3G in factory automation and process control. It connects sensors, actuators, and other field devices. The terminal base works with Flex I/O adapters and modules. Common applications include conveyor systems, packaging lines, and material handling. It also fits in oil and gas, water treatment, and automotive plants. The unit handles up to 2A per I/O terminal. This makes it suitable for high-current signals.

Technical Specifications

Operating temperature: -20 to 70°C. Storage temperature: -40 to 85°C. Humidity range: 5 to 95% non-condensing. Terminal screw torque: 0.56 to 0.79 Nm (5-7 lb-in). Supply voltage: 31.2V DC/AC max, 50/60 Hz, 10A. Isolation voltage: 50V continuous. Wire size: 0.21 to 1.3 mm² (24-16 AWG). Dimensions: 94 x 94 x 69 mm. Weight: not specified. The unit has 36 terminals: 2 common, 2 positive, 10 chassis ground, and 22 I/O points. It provides I/O termination via grounded screw clamps.

Installation & Maintenance Guide

Mount the 1794-TB3G on a DIN rail or panel. Use the supplied keyswitch for module alignment. Connect field wiring to the screw terminals. Torque terminals to 0.56-0.79 Nm. Use copper wire rated at 75°C. Strip insulation to 1.2 mm (3/64 in). Ensure the supply voltage does not exceed 31.2V DC/AC. Do not operate outside -20 to 70°C. Keep the unit clean and dry. Periodically check terminal tightness. Replace only with a genuine Allen-Bradley unit. For shipping, use FedEx, UPS, or DHL.

Packing List

One 1794-TB3G terminal base unit. One instruction manual. One keyswitch label. No additional accessories are included. The unit comes in a protective cardboard box. Ensure the package is intact upon delivery.