Product Overview

The Allen-Bradley 1794-AND (Rev B)​ is a member of Rockwell Automation’s 1794 FLEX I/O family, the compact, DIN-rail-mounted distributed I/O platform designed to place I/O modules close to field devices while communicating back to a central controller (ControlLogix, CompactLogix, PLC-5, or SLC 5/05) through a 1794-series adapter (ControlNet, DeviceNet, EtherNet/IP, PROFIBUS, or Universal Remote I/O). The 1794 architecture decouples the wiring terminal base (e.g., 1794-TB2, TB3, TBN, TBS) from the electronic module (1794-AND​ in this case): field wires land on the terminal base’s screw-clamp connectors, and the module tongue-plugs into the base, allowing module swaps without disturbing field wiring — a signature advantage of FLEX in retrofit and high-vibration environments.While the high-volume 1794 catalog centers on 1794-IBxx (digital in), OBxx (digital out), ANxx (analog), and Axx (adapters), the 1794-AND​ appears in certain distributor/decommissioned records as a 1794-series I/O module variant — potentially a discontinued sub-SKU, a regional configuration, or a specialized composite. In typical 1794 deployments, a 1794-AND​ would occupy one position on a FLEX rail beneath a 1794 adapter, contributing its I/O points (exact point-count TBD by confirming the nameplate — common 1794 modules range 8–32 points depending on density) to the adapter’s backplane and thus to the control-plane rack’s I/O image. The Rev B denotes the second revision, typically involving component/qualification updates rather than functional change, and remains mechanically/interchangeably compatible with the same 1794 terminal bases and adapters as Rev A.The 1794-AND​ draws its operating power from the 1794 terminal base’s external field-power terminals (not from the adapter’s backplane logic supply), keeping field-wiring faults isolated from the communication side. DIN-rail mount (35 mm symmetrical), IP20 with the terminal base fitted, 0–60 °C operating envelope, and UL/CE/cUL certifications align the 1794-AND​ with the broader 1794 ecosystem used across automotive body shops, packaging lines, material handling zones, batch-process skids, and water/wastewater pump stations where I/O is distributed across a machine rather than concentrated in a central panel. Lifecycle-wise, many 1794 sub-SKUs have migrated to “active/available” or “discontinued/MRO” depending on the exact variant — the 1794-AND​ most likely sits in the sustained/MRO channel given its infrequent appearance in current Rockwell selectors. For plants still running 1794 rails commissioned in the 2000s–2010s, the 1794-AND​ is a line-item spare whose value is “click-in, download, run” without touching the FLEX rail’s 1794 adapter config or the host controller’s RSLogix 5000 / Studio 5000 project.

Technical Specifications

📌 Note: Since “1794-AND” is not a standard high-volume catalog code, parameters like I/O point-count, voltage rating, and on-module LED detail should be verified against the unit’s nameplate or Rockwell’s 1794 datasheet (1794-TD005 / 1794-UM001). The table above reflects the 1794-family defaults that apply to any 1794-AND/B.

Main Features and Advantages

FLEX Decoupled Wiring ArchitectureLike all 1794 modules, the 1794-AND​ benefits from the FLEX form factor’s core differentiator: field wires terminate on the 1794 terminal base (TB2/TB3/TBN/TBS), and the electronic module plugs into the base via a tongue connector. When a 1794-AND​ needs replacement — whether from a channel fault or a scheduled spare rotation — the maintenance tech unclips the module, clicks in the spare, and downloads the config (or the adapter auto-recovers the config from the host). Field wiring, including those 24V DC sensor loops and solenoid commons that took two hours to dress, is untouched. On machines with vibration (presses, conveyors, mixers), this also means the field-wire terminations aren’t stressed by module-swap handling.Distributed I/O Close to the ActionThe 1794 platform — and by extension the 1794-AND​ — is built for distribution: instead of homing all I/O in a central panel 50 m from the machine, a 1794 adapter + 8-module FLEX rail sits in a small NEMA box at the machine head, a 30 m coax/TP cable runs back to the control room ControlLogix, and the 1794-AND​ contributes its points locally. This cuts home-run wire count, reduces voltage-drop on 24V DC sensor loops, and shrinks the main panel. For OEMs building 10 identical conveyor zones, each zone gets its own 1794-AND​ + adapter mini-rack, and the control-room PLC sees them as discrete racks — clean bill-of-materials, clean commissioning.Adapter-Agnostic Module LayerA key 1794 strength: the 1794-AND​ doesn’t care which adapter heads the rail. Same 1794-AND​ module works behind a 1794-ACN (ControlNet), ASB (DeviceNet), AENTR (EtherNet/IP), or CE1 (Remote I/O). If the plant migrates the headframe from DeviceNet (1794-ASB) to EtherNet/IP (1794-AENTR), the 1794-AND​ stays put — only the adapter changes. That protects MRO inventory: a spare 1794-AND​ serves any 1794 rail in the facility regardless of which network the rail rides.