Allen-Bradley 1794-IB16XT Input Module | Replacement, Equivalent & Selection Guide
The Allen-Bradley 1794-IB16XT is a 16-point, 24V DC digital input module designed for the Rockwell Automation FLEX I/O platform. Built for extended-temperature environments, it delivers reliable signal acquisition in demanding industrial automation applications. This page provides full technical specifications, compatible replacement models, selection guidance, and sourcing information to help engineers and procurement teams make confident decisions.
Technical Specifications
| Parameter | Value |
|---|---|
| Catalog Number | 1794-IB16XT |
| Brand / Manufacturer | Allen-Bradley (Rockwell Automation) |
| Module Type | Digital Input (DC) |
| Number of Input Points | 16 |
| Input Voltage | 24V DC |
| Input Current (per point) | 8 mA @ 24V DC |
| ON-State Voltage Range | 10 – 30V DC |
| OFF-State Voltage Range | 0 – 5V DC |
| Operating Temperature | -25°C to +70°C (Extended Temp) |
| Storage Temperature | -40°C to +85°C |
| Platform | FLEX I/O (1794 Series) |
| Backplane Current Draw | 75 mA @ 5V DC |
| Isolation | 500V AC (field-to-backplane) |
| Wiring Style | Removable terminal block (RTB) |
| Certifications | UL, CE, CSA, C-Tick |
| Weight | Approx. 300 g |
Compatible Replacement & Equivalent Models
When the 1794-IB16XT is unavailable or discontinued, the following models offer functional or form-fit-function equivalence. Always verify firmware, terminal block, and adapter compatibility before substitution.
| Model | Brand | Points | Voltage | Notes |
|---|---|---|---|---|
| 1794-IB16 | Allen-Bradley | 16 | 24V DC | Standard-temp version; same form factor, no extended-temp rating |
| 1794-IB16D | Allen-Bradley | 16 | 24V DC | With diagnostics; drop-in for applications requiring fault detection |
| 1794-IB8 | Allen-Bradley | 8 | 24V DC | Half-density; use two modules to replace one 16-point unit |
| 1794-IB32 | Allen-Bradley | 32 | 24V DC | High-density upgrade; requires compatible adapter |
| 5069-IB16 | Allen-Bradley | 16 | 24V DC | Compact 5000 platform; migration option with updated architecture |
| IC693MDL645 | GE Fanuc | 16 | 24V DC | Cross-brand equivalent for mixed-fleet environments |
Note: Cross-brand replacements require I/O mapping reconfiguration in the PLC program. Consult your system integrator before substitution.
Why Choose the Original Model
- Extended Temperature Rating: The “XT” suffix certifies operation from -25°C to +70°C — critical for outdoor enclosures, cold-storage facilities, and harsh industrial environments.
- Proven FLEX I/O Ecosystem: Native compatibility with 1794 adapters (e.g., 1794-AENT, 1794-ADN) ensures zero integration risk.
- Rockwell Software Integration: Full support in Studio 5000 Logix Designer and RSLogix 5000 with pre-built Add-On Instructions (AOIs).
- Long Field Track Record: Widely deployed in automotive, food & beverage, and utilities sectors since the 1990s.
- Removable Terminal Block: RTB design allows module swap without rewiring, minimizing downtime during maintenance.
Typical Applications
- Discrete signal acquisition from pushbuttons, limit switches, and proximity sensors
- Machine safety interlocks and status monitoring in automotive assembly lines
- Cold-chain and refrigeration facility automation (extended-temp requirement)
- Outdoor utility and water treatment control panels
- Conveyor and material handling systems
- Oil & gas wellhead and pipeline monitoring panels
System Compatibility
The 1794-IB16XT is compatible with the following FLEX I/O adapters and controllers:
- Adapters: 1794-AENT (EtherNet/IP), 1794-ADN (DeviceNet), 1794-APB (PROFIBUS), 1794-ACN15 (ControlNet), 1794-ASB (Remote I/O)
- Controllers: ControlLogix (1756), CompactLogix (1769), SoftLogix 5800, PLC-5 (via adapter)
- Software: Studio 5000 Logix Designer v21+, RSLogix 5000, RSNetWorx
- Terminal Blocks: 1794-TB3, 1794-TB3S, 1794-TB32 (sold separately)
Selection Guide
- Temperature Range: If ambient temperature exceeds +60°C or drops below -20°C, the XT variant is mandatory. For standard environments, the 1794-IB16 is sufficient.
- Point Count: 16 points covers most standard machine I/O panels. For high-density racks, consider the 1794-IB32.
- Diagnostics Requirement: If your application requires per-point fault detection (open-wire, short-circuit), select the 1794-IB16D instead.
- Network Protocol: Confirm your adapter protocol (EtherNet/IP, DeviceNet, ControlNet, PROFIBUS) before ordering — the module is protocol-agnostic but the adapter is not.
- Voltage Level: This module is rated for 24V DC only. For 120V AC inputs, refer to the 1794-IA16 series.
Quality Assurance & Sourcing
- All units sourced through authorized distributors or verified surplus channels with full traceability documentation.
- Each module undergoes functional power-on testing and visual inspection prior to shipment.
- Original factory packaging preserved where available; repackaged units clearly labeled.
- Counterfeit-risk mitigation: serial number verification and hologram authentication performed on all Allen-Bradley modules.
- Certificate of Conformance (CoC) and test reports available upon request.
How to Order
- Confirm your catalog number: 1794-IB16XT (include firmware revision if known, e.g., Series B).
- Specify quantity and required delivery timeline.
- Indicate whether a terminal block (1794-TB3 or equivalent) is required.
- Contact us via the form below, email, or phone for a formal quotation within 24 hours.
- Purchase orders accepted from registered companies; prepayment options available for new accounts.
📧 support@konmask.com | 📞 +0086 19859288691
Replacement & Compatibility FAQ
Q: Can I replace the 1794-IB16XT with a standard 1794-IB16?
A: Yes, electrically and mechanically they are identical. The only difference is the operating temperature range. If your environment stays within 0°C to +60°C, the standard 1794-IB16 is a direct drop-in replacement.
Q: Does the 1794-IB16XT work with EtherNet/IP adapters?
A: Yes. It is fully compatible with the 1794-AENT adapter. No special configuration is required beyond standard I/O mapping in Studio 5000.
Q: Is the terminal block included?
A: No. The 1794-IB16XT ships without a terminal block. You must order a compatible RTB separately (e.g., 1794-TB3).
Q: What is the lead time for new stock?
A: In-stock units ship within 1–3 business days. For sourced or surplus units, typical lead time is 5–10 business days. Contact us for real-time availability.
Q: Can Konmask provide a Certificate of Conformance?
A: Yes. CoC and inspection reports are available upon request for all orders.
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