Genuine Allen-Bradley 1756-IA32 ControlLogix 32-Point 120V AC Digital Input Module | Verified Source
The Allen-Bradley 1756-IA32 is a cornerstone I/O module within Rockwell Automation’s ControlLogix platform — one of the most widely deployed industrial automation architectures in process, discrete, and hybrid manufacturing environments worldwide. Its 32-point 120V AC input density makes it a preferred choice for high-channel-count applications where panel space and wiring economy are critical. Due to its widespread adoption and high replacement demand, the 1756-IA32 is also one of the most frequently counterfeited and misrepresented PLC modules on the secondary market. Buyers sourcing from unverified channels risk receiving refurbished units sold as new, cloned boards with non-OEM components, or modules with erased firmware — all of which can cause unpredictable system faults, safety incidents, and costly downtime.
At Konmask, every 1756-IA32 unit we supply is sourced exclusively through verified distribution channels and subjected to a rigorous multi-stage authentication and functional verification process before shipment. We do not mix stock from unverified brokers. Our inventory is traceable, our documentation is complete, and our commitment to supplying only genuine, authentic, verified Allen-Bradley hardware is absolute. When you order from Konmask, you receive the real product — backed by paperwork, test data, and a team that stands behind every shipment.
Technical Specifications
| Part Number | 1756-IA32 |
| Brand | Allen-Bradley / Rockwell Automation |
| Series | ControlLogix 1756 |
| Module Type | Digital Input (D/I) |
| Number of Points | 32 |
| Input Voltage | 74–132V AC (Nominal 120V AC) |
| Input Frequency | 47–63 Hz |
| Input Current (ON State) | 5 mA minimum @ 74V AC |
| Input Current (OFF State) | 2.5 mA maximum |
| Backplane Current (5V DC) | 250 mA |
| Isolation Voltage | 250V AC continuous (channel-to-backplane) |
| Wiring | Screw terminal via 1756-TBCH or 1756-TBS6H (sold separately) |
| Dimensions (H × W × D) | 94.0 × 94.0 × 58.4 mm (3.70 × 3.70 × 2.30 in) |
| Weight | 350 g (0.77 lb) |
| Operating Temperature | 0–60°C (32–140°F) |
| Storage Temperature | -40–85°C (-40–185°F) |
| Relative Humidity | 5–95% non-condensing |
| Certifications | UL, CE, C-Tick, FM Class I Div 2 |
Specifications verified against Allen-Bradley official documentation (Publication 1756-TD001, Rockwell Automation).
Our 4-Step Quality Verification Process
Every 1756-IA32 unit shipped by Konmask passes through the following verification stages:
- Step 1 — Physical Authentication: Visual inspection of PCB markings, label integrity, housing mold quality, and serial number format against known-genuine Allen-Bradley specimens. Counterfeit units are rejected at this stage based on label font, color, and barcode structure discrepancies.
- Step 2 — Firmware & Catalog Verification: Module is seated in a live ControlLogix chassis and interrogated via RSLogix 5000 / Studio 5000 to confirm catalog number, series revision, firmware version, and electronic keying data match Rockwell Automation’s published specifications.
- Step 3 — Functional I/O Test: All 32 input channels are individually exercised with a calibrated 120V AC test signal. ON-state and OFF-state current thresholds are measured and logged. Response time and diagnostic LED behavior are verified against the product datasheet.
- Step 4 — Documentation Package Assembly: Upon passing all tests, each unit is assigned a Konmask inspection record. Available documentation includes: Certificate of Conformance (COC), Functional Test Report, High-resolution photos of the actual unit, Packing List with serial number, Country of Origin (COO) Declaration.
Key Features & Benefits
- 32-Point High-Density AC Input: Maximizes I/O density per chassis slot, reducing hardware cost and panel footprint in large-scale discrete and process control systems.
- 120V AC Field Compatibility: Directly interfaces with standard North American and international 120V AC field devices — limit switches, pushbuttons, proximity sensors — without additional signal conditioning.
- IEC 61131-2 Compliant Input Thresholds: ON/OFF state current and voltage thresholds conform to IEC 61131-2 Type 1 digital input specifications, ensuring interoperability with globally sourced field devices.
- Channel-to-Backplane Isolation (250V AC): Meets IEC 60664-1 insulation coordination requirements, protecting the ControlLogix backplane and CPU from field-side voltage transients and ground faults.
- Removable Terminal Block Wiring: Compatible with 1756-TBCH and 1756-TBS6H terminal blocks, enabling pre-wired cabinet assembly and rapid module swap without rewiring — reducing MTTR in maintenance scenarios.
- ControlLogix Chassis Hot-Swap Capable: Supports removal and insertion under power (RIUP) per Rockwell Automation’s ControlLogix system design guidelines, enabling maintenance without full system shutdown.
Typical Applications
- Automotive Assembly Lines: Monitoring 120V AC limit switches and safety interlocks on body welding, stamping, and paint shop conveyors where ControlLogix is the primary control platform.
- Oil & Gas Processing Plants: Reading AC field signals from valve position switches, level switches, and pressure switches in upstream and midstream facilities with existing 120V AC field wiring infrastructure.
- Water & Wastewater Treatment: Interfacing with pump run/fail status signals, float switches, and motor starter auxiliary contacts in municipal and industrial water treatment SCADA systems.
- Food & Beverage Production: Capturing AC input signals from conveyor end-of-travel switches, door interlocks, and agitator status contacts in hygienic processing environments.
- Power Generation & Utilities: Monitoring breaker status, relay contact outputs, and annunciator panel inputs in substation automation and distributed generation control systems.
- Pharmaceutical Manufacturing: Reading AC status signals from clean-room HVAC damper position switches, sterilizer door interlocks, and batch reactor safety circuits in FDA-regulated environments.
Compatible System Components
- Chassis: 1756-A4, 1756-A7, 1756-A10, 1756-A13, 1756-A17 (all ControlLogix chassis)
- Power Supplies: 1756-PA72, 1756-PB72, 1756-PA75, 1756-PB75
- Controllers: 1756-L61, 1756-L62, 1756-L63, 1756-L71, 1756-L72, 1756-L73, 1756-L74, 1756-L75, 1756-L81E, 1756-L82E, 1756-L83E, 1756-L84E, 1756-L85E
- Terminal Blocks: 1756-TBCH (36-pin cage clamp), 1756-TBS6H (36-pin screw)
- Communication Modules: 1756-EN2T, 1756-EN2TR, 1756-EN3TR (EtherNet/IP); 1756-CN2, 1756-CN2R (ControlNet); 1756-DNB (DeviceNet)
- Programming Software: RSLogix 5000 v16+, Studio 5000 Logix Designer v21+
Global Sourcing & Shipping Capabilities
Konmask serves industrial automation buyers across Asia-Pacific, the Middle East, Europe, and the Americas. Our standard export packaging for the 1756-IA32 includes:
- Anti-static foam insert with individual module tray
- Sealed moisture-barrier bag with desiccant
- Original or equivalent OEM-style outer carton
- Full documentation package (COC, test report, packing list, COO declaration) included in shipment
Shipping options include DHL Express (2–5 business days globally), FedEx International Priority, and sea freight consolidation for bulk orders. All shipments are fully insured and tracked. Export documentation (commercial invoice, packing list, HS code 8537.10) is prepared to facilitate smooth customs clearance in destination countries. Lead time for in-stock units: 1–3 business days. For large-volume or urgent requirements, contact us for expedited processing.
Certifications & Compliance Statement
- UL Listed — UL 508 Industrial Control Equipment
- CE Marked — EMC Directive 2014/30/EU; Low Voltage Directive 2014/35/EU
- C-Tick / RCM — Australian Communications and Media Authority
- FM Approved — Class I, Division 2, Groups A, B, C, D (Hazardous Locations)
- RoHS Compliant — EU Directive 2011/65/EU
Konmask Quality Commitment: We supply only genuine, OEM-manufactured Allen-Bradley hardware. We do not sell repaired, remanufactured, or third-party cloned modules as original. Every unit is traceable to its source, tested before shipment, and covered by our authenticity guarantee. If any unit we supply fails to match its stated specifications or is determined to be non-genuine, we will replace it or issue a full refund — no questions asked.
How to Order
- Submit Your Inquiry: Add to cart and complete checkout, or contact us directly at [email protected] with your required quantity, delivery timeline, and any special documentation requirements (COC, test report, COO declaration).
- Receive Confirmation & Quote: Our team responds within 24 hours with order confirmation, lead time, shipping options, and a proforma invoice. Bulk pricing is available for orders of 5+ units.
- Shipment & Documentation: Upon payment confirmation, your order is picked, tested (if not pre-tested), packed, and dispatched with full documentation. Tracking information is provided within 24 hours of shipment. Sample units and pre-shipment test reports are available upon request for first-time buyers.
Authenticity & Trust FAQ
- Q: How can I verify that the 1756-IA32 I receive from Konmask is genuine Allen-Bradley?
- A: Every unit we ship can be verified by seating it in a ControlLogix chassis and reading its electronic identity via Studio 5000 / RSLogix 5000 — the catalog number, series, and firmware version will match Rockwell Automation’s published data exactly. We also provide high-resolution photos of the actual unit prior to shipment upon request, and our COC documents the serial number and inspection outcome for each module.
- Q: What is your warranty and return policy for the 1756-IA32?
- A: All units are covered by Konmask’s 12-month functional warranty from the date of shipment. If a module fails under normal operating conditions within the warranty period, we will replace it or issue a full refund. Units that are found to be non-genuine at any point are eligible for immediate replacement or refund regardless of the warranty period.
- Q: Can you provide a test report or Certificate of Conformance before I place a large order?
- A: Yes. For orders of 3 or more units, we can provide a pre-shipment functional test report and Certificate of Conformance (COC) as standard. For first-time buyers or qualification orders, we can also arrange a sample unit with full documentation before you commit to a larger purchase. Contact [email protected] to discuss your specific requirements.
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