Discrete Input Solution – Allen-Bradley 1794-IA16 | FLEX I/O Series
Where This Product Is Used
The Allen-Bradley 1794-IA16 is a 16-channel AC digital input module designed for demanding industrial automation environments. It is widely deployed in the following applications:
- Automotive Assembly Lines – Monitoring conveyor belt position sensors, door-open/close interlocks, and safety gate status across high-cycle production cells.
- Water & Wastewater Treatment Plants – Reading float switch signals, pump run/fault feedback, and valve open/close confirmation in wet, corrosive environments.
- Food & Beverage Processing – Capturing discrete signals from proximity sensors, level switches, and machine-guarding circuits in washdown-rated panels.
- Oil & Gas Wellhead & Pipeline Control – Interfacing with field-mounted pressure switches, flow switches, and emergency shutdown (ESD) pushbuttons over long cable runs.
- Building Automation & HVAC – Aggregating status inputs from air-handling units, damper actuators, and fire/smoke detection systems into a central FLEX I/O rack.
- Material Handling & Packaging – Detecting product presence via photoelectric sensors and limit switches on pick-and-place and palletizing equipment.
Technical Specifications
| Part Number | 1794-IA16 |
| Manufacturer | Allen-Bradley (Rockwell Automation) |
| Series | FLEX I/O |
| Module Type | AC Digital Input |
| Number of Input Channels | 16 |
| Input Voltage Range | 74–132 V AC (nominal 120 V AC) |
| Input Frequency | 47–63 Hz |
| Input Current (ON state) | ≥ 5 mA @ 120 V AC |
| Input Current (OFF state) | ≤ 2.5 mA |
| Isolation Voltage | 1500 V AC (channel-to-backplane) |
| Backplane Current Draw | 75 mA @ 5 V DC |
| Operating Temperature | 0 °C to +55 °C |
| Storage Temperature | -40 °C to +85 °C |
| Relative Humidity | 5–95% non-condensing |
| Dimensions (H × W × D) | 94 mm × 23 mm × 87 mm |
| Weight | ~100 g |
| Compatible Adapter | 1794-AENT, 1794-ACN15, 1794-ADNK15, 1794-APB, and others |
| Wiring Base Required | 1794-TB3, 1794-TB3S, or equivalent FLEX I/O terminal base |
Why Engineers Specify This Model
- Native 120 V AC Input – Eliminates the need for external signal converters or interposing relays when interfacing with legacy AC field devices, reducing panel footprint and wiring cost.
- High Channel Density – 16 channels in a 23 mm-wide module maximises I/O density in space-constrained FLEX I/O racks.
- Galvanic Isolation – 1500 V AC channel-to-backplane isolation protects the controller backplane from field-side transients and ground loops.
- Broad Adapter Compatibility – Works with EtherNet/IP, ControlNet, DeviceNet, and PROFIBUS adapters, making it suitable for both greenfield and brownfield network migrations.
- Proven Field Reliability – Part of Rockwell Automation’s FLEX I/O platform, which has accumulated decades of installed-base data across global process and discrete manufacturing sites.
- Studio 5000 / RSLogix 5000 Integration – Fully supported by Rockwell’s standard programming environment with pre-built Add-On Instructions (AOIs) and electronic data sheets (EDS).
Complete System Bill of Materials
A typical 1794-IA16 installation requires the following components. Konmask.com can source all items:
- 1794-IA16 – AC Digital Input Module (this item)
- 1794-TB3 / 1794-TB3S – FLEX I/O Terminal Base (screw or spring-clamp wiring)
- 1794-AENT – EtherNet/IP Adapter (or alternative network adapter per topology)
- 1794-PS13 – FLEX I/O Power Supply (if local power rail is required)
- 1794-END – End Cap (required to terminate the FLEX I/O bus)
- 1756-L8x ControlLogix / 5069-L3x CompactLogix – Compatible PLC controller platform
Compliance & Industry Standards
- UL Listed (UL 508)
- CE Marked – EMC Directive 2014/30/EU & Low Voltage Directive 2014/35/EU
- RoHS Compliant
- cUL Listed (Canadian market)
- ATEX / IECEx – consult factory for hazardous-location variants
- IEC 61131-2 (Programmable Controllers – Equipment Requirements)
Quality Assurance & Sourcing
Konmask.com specialises in the procurement of industrial automation components for MRO, capital projects, and emergency replacement scenarios. Our sourcing process includes:
- Authorised & Verified Supply Chain – We work with authorised distributors and traceable secondary-market channels to ensure genuine Rockwell Automation product.
- Pre-Shipment Inspection – Each module is visually inspected for label integrity, date codes, connector condition, and packaging authenticity before dispatch.
- Serialisation & Documentation – Original factory labels, date codes, and where available, certificates of conformance (CoC) are provided with shipment.
- Warranty – 90-day replacement warranty against defects in materials and workmanship on all stocked units.
How to Source This Part
- Add to Cart – Click Add to Cart on this page for standard stock orders.
- Request a Quote – For volume orders (> 5 units), OEM pricing, or project BOM sourcing, email support@konmask.com with your required quantity and delivery timeline.
- Urgent / Emergency Orders – Call or WhatsApp +0086 19859288691 for same-day quotation and expedited shipping options.
- International Shipping – We ship globally via DHL Express, FedEx International Priority, and sea freight for pallet quantities. Export documentation (commercial invoice, packing list, HS code 8538.90) is provided as standard.
Application-Specific FAQ
Q: Can the 1794-IA16 accept 240 V AC inputs?
A: No. The 1794-IA16 is rated for 74–132 V AC (120 V AC nominal). For 240 V AC field devices, specify the 1794-IA16I (isolated, 240 V AC) or use an interposing relay to step down the signal.
Q: Does this module require a separate terminal base?
A: Yes. All FLEX I/O modules require a compatible terminal base (e.g., 1794-TB3 or 1794-TB3S). The module and terminal base are ordered and shipped separately.
Q: Which network adapters are compatible?
A: The 1794-IA16 is compatible with all standard FLEX I/O adapters including 1794-AENT (EtherNet/IP), 1794-ACN15 (ControlNet), 1794-ADNK15 (DeviceNet), and 1794-APB (PROFIBUS DP).
Q: Is this module suitable for SIL-rated safety applications?
A: The standard 1794-IA16 is not SIL-rated. For functional safety applications, Rockwell Automation’s GuardLogix or 1791DS Safety I/O platform should be evaluated.
Q: What is the lead time for out-of-stock units?
A: Typical lead time for sourced units is 3–10 business days depending on global availability. Contact us for a real-time stock check.
Q: Can Konmask.com provide a test report or functional verification?
A: Yes. Functional bench-test reports are available on request for critical MRO replacements. Please specify this requirement at the time of order.
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