Allen Bradley 1794-TB3 AB Flex Terminal Base

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Brand Name                 AB

Product reference      1794-TB3

The 1794-TB3 Flex I/O Terminal Base Unit by Allen-Bradley is a device which provides terminal connection points for I/O wiring and contributes to the formation of the backplane. It has a maximum of 16 I/O connections with 18 common terminals and 18 voltage terminals. The 1794-TB3 is used in an application with a 125V AC/DC electrical rating and it has a maximum current capacity of 10A with 0.21 x 1.3 mm2 (24-16 AWG) stranded copper wire intended for use with input and output modules. The 1794-TB3 has a Flexbus rating of 5V DC at 640mA and it supplies a 2A current to the I/O terminals. It also has V/COM Terminals ratings of 125V DC/AC and 10A at 50-60Hz. 

The 1794-TB3 provides voltage isolation of 125V (continuous) using Basic Insulation Type between Field Wiring Terminals to FLEXBUS and it has a terminal screw torque of 0.56 x 0.79 Nm (5 x 7lb-in). It has a T4A (North America) designated temperature code and an IEC T4 temperature code. The 1794-TB3 has an IEC-rated operational temperature of -20-70 °C (-4-158 °F) at 5-95% non-condensing relative humidity and it is tested and rated to withstand an operational shock of 30G and a vibration of 5G at 10-500Hz. The 1794-TB3 is c-UL-us, UL, CSA, and CE-certified and has a dimension 94mm x 94mm x 69mm (3.7in x 3.7in x 2.7in).

1794 FLEX I/O Terminal Base Units Standard FLEX I/O Catalog Numbers 1794-TB2, 1794-TB3, 1794-TB3K, 1794-TB32, 1794-TB3G, 1794-TB3GK, 1794- TB3T, 1794-TB3TK, 1794-TB3S, 1794-TB3SK, 1794-TB32S, 1794-TB3GS, 1794-TB3GSK, 1794-TB3TS, 1794-TB3TSK, 1794-TBN, 1794-TBNF, 1794-TBNK, 1794-TBKD, 1794-TB37DS, 1794-TB62DS The letter K in the last position of the catalog number, before the series designation, indicates a conformal coated versions of standard modules and can be used with extended temperature modules (modules ending in -XT). FLEX I/O Accessories Catalog Numbers 1794-CE1, 1794-CE3, 1794-NM1, 1794-LBL, 1794-N2, 1794-CJC2 

Each FLEX I/O™ module requires a terminal base unit that snaps onto the DIN rail to the right of the I/O adapter. The terminal bases provide terminal connection points for I/O wiring and plug together to form the backplane. They are available with cage, screw or spring - clamp terminations. Each FLEX I/O module has optional accessories available depending on the I/O module, field system set-up and requirements.

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