The 1794-TB2 terminal base unit provides the essential foundation for your distributed control system. This Allen-Bradley component uses a reliable cage clamp design. It connects your Flex I/O modules to field wiring. The unit handles a maximum of 10 Amps. It also supports up to 125 Volts AC/DC. You can install this base on a panel or DIN rail. It works with 24 to 16 AWG stranded copper wire. This makes the 1794-TB2 a versatile choice for your automation network.
Step-by-Step User & Installation Guide for the 1794-TB2
Mount the 1794-TB2 directly onto a standard DIN rail or panel. The unit has pre-drilled mounting holes. You attach the module locking latch to secure it firmly. This prevents movement during high-vibration operations. The base is rated for 5 g at 10 to 500 Hertz. This ensures stable signal connections in harsh environments.
You must use a screw torque of 5 to 7 pound-inches for the terminals. The terminal screw torque requirement is 0.56-0.79 Nm. You use a cage clamp and 2-wire screw termination method. Wire stripping for 1794-TB2 insulation needs only a 3/64-inch length. You connect category 2 wires with a size range of 0.21 to 1.3 mm^2.
The 1794-TB2 has one row of 16 terminals and another row of 18 terminals. It also includes a smaller row of 2 terminals. You connect the male and female FlexBus connectors to link modules. The key switch prevents incorrect module insertion. You must always use the cover plug for the unused FlexBus connector.
The operating temperature range of this unit is 0 to 55 degrees Celsius. You can store the unit safely between -40 and 85 degrees Celsius. The unit withstands an operating shock of 30 g. It also survives a non-operating shock of 50 g. This makes the 1794-TB2 extremely durable for industrial applications.
Comparative Analysis & Alternative Matrix for the 1794-TB2
The 1794-TB2 differs from the 1794-TBN and 1794-TB3 models. The 1794-TBN uses a NEMA style terminal block. The 1794-TB2 specifically uses a cage clamp termination. This cage clamp provides a gas-tight connection for the 1794-TB2. It prevents wire loosening from thermal cycling better than screw terminals. The 1794-TB3 model offers a 3-wire termination. The 1794-TB2 only provides a standard 2-wire termination.
Other terminal base models like the 1794-TB2 have different channel counts. The 1794-TBKD includes a built-in fuse holder for each channel. The 1794-TB2 does not have this integrated fuse feature. You must use external fusing for the 1794-TB2. The 1794-TB3S adds a shield connection for analog signals. The 1794-TB2 is best suited for general-purpose discrete I/O modules.
This specific 1794-TB2 base unit uses a 24V DC/AC or 120V DC/AC voltage rating. It has a maximum supply voltage of 125V DC/AC at 50/60 Hz. The isolation voltage is 125V continuous. The channel-to-channel isolation depends entirely on the inserted module. You must select the right module to meet your isolation requirements. The 1794-TB2 measures 94 x 94 x 69 mm.
Logistics & Standard Packaging Details
