Genuine Allen-Bradley 1746SC-IA8I Isolated Input Module | SLC 500 Series – Verified Source
The Allen-Bradley 1746SC-IA8I is a safety-rated isolated AC input module within Rockwell Automation’s SLC 500 platform — one of the most widely deployed programmable logic controller families in global industrial automation. Its channel-to-channel isolation architecture makes it indispensable in high-noise environments such as power generation, heavy manufacturing, and process control. Due to its critical role in safety-critical systems and the complexity of its internal isolation circuitry, the 1746SC-IA8I is a frequent target for counterfeit reproduction and grey-market substitution. Buyers sourcing from unverified channels risk receiving modules with degraded isolation ratings, non-compliant firmware, or outright non-functional units — all of which pose serious operational and safety risks.
At Konmask, every Allen-Bradley 1746SC-IA8I we supply is sourced through verified distribution channels and subjected to our multi-step authentication protocol before shipment. We stock only genuine, authentic Allen-Bradley hardware — never refurbished-as-new or third-party clones. Our verified sourcing process, combined with full documentation availability (Certificate of Conformance, test reports, packing lists, and Country of Origin declarations), gives procurement engineers and maintenance teams the confidence to specify Konmask as a trusted supply partner for critical automation components.
Technical Specifications
| Part Number | 1746SC-IA8I |
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Series | SLC 500 (1746 Chassis) |
| Module Type | Isolated AC Digital Input |
| Number of Inputs | 8 (individually isolated channels) |
| Input Voltage Range | 74–132 VAC (nominal 120 VAC) |
| Input Frequency | 47–63 Hz |
| ON-State Voltage | 74–132 VAC |
| OFF-State Voltage | 0–20 VAC |
| ON-State Current | 5 mA minimum |
| OFF-State Current | 2.5 mA maximum |
| Isolation Voltage | Channel-to-channel: 250 VAC continuous |
| Power Consumption | 3.0 W (backplane) |
| Operating Temperature | 0°C to +60°C |
| Storage Temperature | -40°C to +85°C |
| Relative Humidity | 5–95% non-condensing |
| Backplane Compatibility | All 1746 SLC 500 chassis (4, 7, 10, 13 slot) |
| Certifications | UL Listed, CE Marked, CSA Certified |
| Weight | Approx. 200 g |
Specifications verified against Allen-Bradley / Rockwell Automation official documentation (Publication 1746-TD001).
Our 4-Step Quality Verification Process
Every 1746SC-IA8I shipped by Konmask passes through the following verification stages:
- Step 1 — Visual & Marking Authentication: Physical inspection of label printing, part number engraving, date codes, and housing mold quality against known-genuine reference units. Counterfeit modules frequently exhibit label misalignment, incorrect font weight, or absent holographic elements.
- Step 2 — Functional Bench Test: Each module is powered up in a live SLC 500 chassis. All 8 input channels are individually stimulated at rated voltage (120 VAC) and verified for correct ON/OFF state transitions and response time within Allen-Bradley specification windows.
- Step 3 — Isolation Integrity Test: Channel-to-channel isolation is verified using a calibrated hi-pot tester at 250 VAC. Any module failing isolation thresholds is immediately quarantined and rejected.
- Step 4 — Documentation Package Assembly: Upon passing all tests, a complete documentation package is prepared: Certificate of Conformance (COC), functional test report, high-resolution photos of the physical unit, packing list, and Country of Origin (COO) declaration. All documents are available upon request prior to or at time of shipment.
Key Features & Benefits
- Full Channel-to-Channel Isolation: Each of the 8 inputs is individually isolated at 250 VAC continuous, eliminating ground loop interference in multi-source AC input applications — compliant with IEC 61131-2 Type 1 input requirements.
- Wide AC Input Range: Accepts 74–132 VAC across the full 47–63 Hz frequency band, providing robust compatibility with global power infrastructure without additional signal conditioning.
- SLC 500 Native Compatibility: Plug-and-play integration with all 1746 chassis configurations; no special firmware or configuration files required beyond standard RSLogix 500 I/O configuration.
- High Noise Immunity: Designed to IEC 61000-4 EMC immunity standards, making it suitable for deployment adjacent to variable frequency drives, large motor starters, and welding equipment.
- Low Off-State Leakage: Maximum 2.5 mA off-state current prevents false triggering from leakage current in long cable runs — critical for reliable operation in field-wired installations per NFPA 79 panel wiring practices.
- Proven Field Reliability: The 1746SC series has accumulated decades of documented field service in continuous-process industries, with MTBF data published in Rockwell Automation reliability documentation.
Typical Applications
- Power Generation: Monitoring isolated AC status signals from generator protection relays, breaker auxiliary contacts, and transformer tap position indicators where ground potential differences exist between signal sources.
- Oil & Gas Processing: Reading field instrument status (pressure switch, level switch, flow switch) in installations where intrinsic safety barriers or galvanic isolators are used upstream of the PLC input.
- Water & Wastewater Treatment: Acquiring pump run/fault status and valve position feedback in wet environments where multiple earthing points create ground loop risk.
- Automotive Assembly: Interfacing with 120 VAC safety mat, light curtain, and emergency stop relay outputs in body-in-white and paint shop automation lines.
- Food & Beverage: Capturing AC status signals from washdown-rated sensors and solenoid valve feedback contacts in hygienic processing areas with stainless steel enclosures and isolated bonding.
- Building Automation & HVAC: Reading AC control signals from legacy HVAC equipment, damper actuators, and chiller status contacts integrated into SLC 500-based building management systems.
Compatible System Components
- 1746-A4 / A7 / A10 / A13 — SLC 500 Chassis (4, 7, 10, 13 slot)
- 1747-L20 / L30 / L40 / L553 — SLC 5/02, 5/03, 5/04, 5/05 Processors
- 1746-P1 / P2 / P3 / P4 — SLC 500 Power Supplies
- 1746-N2 — Slot Filler Module (for unused chassis slots)
- 1492-IFM Series — Interface Modules for terminal block wiring
- 1747-UIC / 1784-U2DHP — USB-to-DH+ Programming Cables (RSLogix 500)
- 1746-BAS / 1746-HSTP1 — Specialty I/O modules for mixed-chassis configurations
Global Sourcing & Shipping Capabilities
Konmask supplies the 1746SC-IA8I to customers across North America, Europe, Southeast Asia, the Middle East, and Oceania. Our standard export packaging uses anti-static foam-lined cartons with moisture barrier bags and desiccant packs, meeting ISTA 2A transit testing standards. Each shipment includes a complete packing list and commercial invoice with accurate HS code classification (HS 8537.10) for smooth customs clearance. We support DDP (Delivered Duty Paid), DAP, and EXW Incoterms. Expedited air freight (2–5 business days to most destinations) and economy sea/air consolidation options are available. All shipments are fully insured and tracked from dispatch to delivery confirmation.
Certifications & Compliance Statement
- UL Listed — UL 508 (Industrial Control Equipment)
- CE Marked — EMC Directive 2014/30/EU; Low Voltage Directive 2014/35/EU
- CSA Certified — CSA C22.2 No. 142 (Process Control Equipment)
- RoHS Compliant — EU Directive 2011/65/EU (as applicable to original manufacture date)
- IEC 61131-2 — Programmable Controllers: Equipment Requirements and Tests
Konmask Quality Commitment: We warrant that all Allen-Bradley products supplied are genuine Rockwell Automation manufactured components, sourced through verified channels. We do not supply remanufactured, relabeled, or counterfeit goods. Any unit found to be non-genuine will be replaced at no cost with full freight coverage. Our quality commitment is backed by our documented verification process and available test reports.
How to Order
- Submit Your Inquiry: Contact us via the product page, email [email protected], or WhatsApp/phone +0086 19859288691 with your required quantity, delivery destination, and any documentation requirements (COC, test report, COO declaration).
- Receive Quotation & Confirmation: We respond to all inquiries within 24 hours with a formal quotation including unit price, lead time, shipping options, and available documentation. Stock availability is confirmed at time of quotation.
- Place Order & Ship: Upon order confirmation and payment, your unit(s) are pulled from verified stock, pass final inspection, documentation is assembled, and shipment is dispatched with full tracking. Sample units and pre-shipment test reports are available upon request for first-time orders.
Authenticity & Trust FAQ
- Q: How can I verify that the 1746SC-IA8I I receive from Konmask is genuine Allen-Bradley?
- A: Every unit we ship has passed our 4-step verification process. We provide high-resolution pre-shipment photos of the actual unit, including label, date code, and housing details. Upon request, we supply a Certificate of Conformance (COC) and functional test report. You can also cross-reference the date code and traceability markings against Rockwell Automation’s published date code format guidelines.
- Q: What is Konmask’s warranty policy for the 1746SC-IA8I?
- A: We offer a 12-month warranty against manufacturing defects and DOA (Dead on Arrival) units from the date of shipment. If a unit fails within the warranty period under normal operating conditions, we will replace it at no charge including return freight. Our warranty explicitly covers authenticity: any unit confirmed as non-genuine is replaced immediately regardless of time elapsed since purchase.
- Q: Can Konmask provide a test report or COC before I place a large order?
- A: Yes. For qualified inquiries, we can provide sample units for your own incoming inspection, along with our internal test report and COC documentation prior to full order commitment. We encourage this practice for first-time buyers and for applications with stringent incoming quality control requirements. Contact us to arrange a pre-order sample evaluation.
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Contact: [email protected] | +0086 19859288691
