Description
The 1794‑CE1 is a 0.3‑meter (1‑foot) extender and interconnect cable from Allen‑Bradley’s FLEX I/O 1794 series, designed to bridge the physical gap between a communication adapter module and the first terminal base in a distributed I/O system. This passive cable carries power, data, and communication signals across the FLEX I/O backplane, enabling flexible system layouts.
The 1794‑CE1 addresses the common challenge of limited panel space by allowing adapters and I/O banks to be physically separated—improving heat dissipation, simplifying wiring access, and enabling creative system configurations.
Application Scenarios
A system integrator is designing a control cabinet for a chemical processing line using a FLEX I/O system with a 1794‑AENT EtherNet/IP adapter and eight analog I/O modules. The adapter generates significant heat, and the sensitive analog modules require stable thermal conditions for accurate measurements. By using the 1794‑CE1, the integrator mounts the adapter in a cooler section of the cabinet while placing the I/O terminal bases closer to the field wiring termination points. This solves two critical pain points: protecting sensitive analog signals from heat and simplifying maintenance—adapter replacement no longer requires disturbing the densely wired I/O bases.
Parameters
| Main Parameters | Value/Description |
|---|---|
| Product Model | 1794‑CE1 |
| Manufacturer | Allen‑Bradley (Rockwell Automation) |
| Product Category | FLEX I/O Extender / Interconnect Cable |
| Cable Length | 0.3 meters (1 foot) |
| Connector Type | 15‑pin D‑Shell, male‑to‑male, shielded |
| Function | Extends backplane bus between adapter and terminal base |
| Signal Transmission | Power, data, and communication signals |
| Operating Temperature | 0 to 60 °C (32 to 140 °F) |
| Storage Temperature | -40 to 85 °C (-40 to 185 °F) |
| Humidity | 5 to 95% non‑condensing |
| Shock (Operating) | 30g peak acceleration |
| Vibration | 5g |
| System Limitation | Only one extender cable should be used per FLEX I/O system |
| Mounting Compatibility | DIN rail or panel‑mounted configurations |
| Product Status | Active |
Technical Principles and Innovative Values
Innovation Point 1: Passive Bus Extension with Full Signal Integrity
The 1794‑CE1 is a passive electrical component that extends the FLEX I/O backplane bus without active signal conditioning. With its shielded 15‑pin D‑Shell connectors, it maintains signal integrity while allowing physical separation of up to 0.3 meters between the adapter and the first terminal base. This enables system designers to split a single I/O rack into two rows or mount sections in different orientations.
Innovation Point 2: Universal Compatibility Across the 1794 Family
The 1794‑CE1 connects any 1794 communication adapter—such as the 1794‑ASB (Remote I/O), 1794‑AENT (EtherNet/IP), and 1794‑APB (PROFIBUS DP)—to any standard 1794 terminal base, including the 1794‑TB3, 1794‑TB3S, and 1794‑TB3G series. This ensures a single cable model serves diverse network protocols and I/O configurations.
Innovation Point 3: Rugged Construction for Industrial Environments
The 1794‑CE1 is built to withstand the rigors of the factory floor, rated for 30g operating shock and 5g vibration. Its shielded connectors provide additional protection against electromagnetic interference (EMI), ensuring reliable communication even in environments with variable‑frequency drives or heavy machinery.
Innovation Point 4: Layout Optimization Without System Modification
The cable allows system layouts to be split horizontally or vertically without modifying the system architecture. This is particularly valuable in retrofit applications where existing cabinet space is fragmented or where the adapter must be mounted in a dedicated, cooled zone separate from the high‑density wiring area.
