Allen Bradley 1794-TB3 Terminal Base 1794TB3 and 50 similar items

Allen Bradley 1794-TB3 Terminal Base 1794TB3 Ser. A LOT OF 3 PRE OWNED/ GOOD CONDITION The Allen-Bradley 1794-TB3 (Series A) is a FLEX I/O terminal base unit used with Rockwell Automation?s 1794 FLEX I/O modules. It is the removable wiring base that mounts on a DIN rail and provides the electrical interface between field wiring and the plug-in I/O module. What it is The 1794-TB3 is a 3-wire cage-clamp terminal base designed for higher-density FLEX I/O modules (typically 32-point or mixed signal modules). The I/O module plugs into the base, and the base provides: Field wiring terminals Backplane/FLEXBUS connections Power distribution for I/O groups Mechanical mounting on DIN rail Key specifications Part number: 1794-TB3 / 1794TB3 Series A System: Allen-Bradley FLEX I/O (1794 series) Terminal style: Cage clamp / screwless spring clamp Wiring capacity: up to 32-point module configurations Backplane voltage: 5 VDC FLEXBUS (~640 mA max) Field wiring voltage: typically up to 120/125 VAC or VDC depending on module Mounting: DIN rail, modular daisy-chain base system Temperature range: about -20 to +70 C How it works in a system A FLEX I/O node is built like this: 1794-AENT / adapter module (EtherNet/IP or other network) One or more 1794-TB3 terminal bases Plug-in I/O modules (inputs, outputs, analog, etc.) The TB3 provides the physical wiring points and carries the internal FLEXBUS signals between modules. Typical use You?ll see the 1794-TB3 used in: Machine control panels Distributed I/O racks Packaging and material handling systems Remote I/O cabinets where modular replacement is needed Series A meaning ?Series A? just indicates the original hardware revision. It is: Functionally compatible with later revisions in most cases Interchangeable as long as wiring keying and module type match Practical note (important in the field) The TB3 itself does not control logic It is not intelligent Most failures in FLEX I/O systems blamed on modules are often actually: TB base damage Backplane pin issues Incorrect base/module mismatch Wiring shorts on the terminal strip SHELF: 39 SA