Allen Bradley 1794-TB3TS Terminal Base Unit

Overview

The Allen-Bradley 1794-TB3TS is a FLEX I/O terminal base unit. Rockwell Automation designed it for temperature and I/O module connectivity. It supports spring-clamp wiring and DIN rail or panel mounting. This terminal base integrates with FLEX I/O temperature modules and builds part of the backplane system. It offers a reliable and compact interface for industrial applications rated up to 125V AC/DC and 10A current. Its structure includes 16 I/O terminals, CJC support, and multiple voltage and common terminals. This makes it ideal for distributed control and process automation systems.

Technical Specifications

Manufacturer: Rockwell Automation
Brand: Allen-Bradley
Catalog Number: 1794-TB3TS
Product Type: FLEX I/O Terminal Base Unit

Electrical Ratings:

• Max Voltage: 125V AC/DC, 50/60 Hz

• Max Current: 10A

• FLEXBUS Supply: 640 mA at 5V DC

• I/O Terminal Current: 2A max

• Isolation Voltage: 125V (field wiring to FLEXBUS)

Wiring and Terminal Details:

• I/O Terminals: 16

• Common Terminals: 10

• Voltage Terminals: 4

• Chassis Ground Terminals: 8

• CJC Terminals: 2 sets

• Connection Type: Spring-clamp

• Supported Wire Size: 22–12 AWG (0.34–3.3 mm²)

• Wire Insulation Rating: 75 °C

• Wire Thickness: 1.2 mm (3/64 in)

Mechanical:

• Mounting Options: DIN Rail or Wall/Panel

• Enclosure Type: Open-style

• IP Rating: IP20

• Terminal Torque: 0.56–0.79 Nm

• Dimensions: 94 mm x 94 mm x 69 mm (3.7 in x 3.7 in x 2.7 in)

• Weight: 1.44 lbs

Environmental:

• Operating Temperature: -20 to 70 °C (-4 to 158 °F)

• Relative Humidity: 5%–95%, non-condensing

• Temperature Code: T4A, T4 (up to 135 °C)