Discrete I/O Control Solution – Allen-Bradley 1762-IQ8 | MicroLogix 1100/1400 Series
The Allen-Bradley 1762-IQ8 is an 8-point 24V DC digital input expansion module designed for the MicroLogix 1100 and 1400 controller platforms. Built for demanding industrial environments, this module extends the native I/O capacity of MicroLogix systems with reliable, noise-immune discrete signal acquisition — making it the preferred choice for machine builders and system integrators who require deterministic input scanning in compact panel footprints.
Where This Product Is Used
The 1762-IQ8 is deployed across a wide range of industrial automation applications where reliable discrete signal detection is critical:
- Conveyor & Material Handling Systems — Monitoring proximity sensors, end-of-travel limit switches, and photo-eye inputs along conveyor lines to coordinate start/stop sequencing and jam detection.
- Packaging Machinery — Capturing signals from product-present sensors, door interlocks, and manual operator pushbuttons on form-fill-seal and cartoning equipment.
- Pump & Motor Control Panels — Reading run/fault feedback from motor starters, flow switches, and pressure switches in water treatment, HVAC, and process skids.
- Assembly Line Fixtures — Interfacing with part-present sensors, clamp confirmation switches, and safety gate inputs on semi-automated assembly stations.
- Building Automation & Utilities — Monitoring discrete status signals from HVAC dampers, lighting contactors, and utility metering equipment in facility management applications.
- Food & Beverage Processing — Integrating with washdown-rated sensors in hygienic environments where 24V DC sourcing inputs provide reliable signal integrity.
Technical Specifications
| Part Number | 1762-IQ8 |
| Series / Platform | MicroLogix Expansion I/O (MicroLogix 1100, 1400) |
| Number of Input Points | 8 Points |
| Input Type | Discrete (Digital) — DC Sourcing (IEC Type 1) |
| Nominal Input Voltage | 24V DC |
| Input Voltage Range | 10–28.8V DC |
| Input Current (ON State) | 6 mA @ 24V DC |
| ON-State Voltage Threshold | ≥ 10V DC |
| OFF-State Voltage Threshold | ≤ 5V DC |
| Input Impedance | 4 kΩ |
| Isolation | Optical isolation between field and logic side |
| Response Time (ON) | ≤ 2 ms |
| Response Time (OFF) | ≤ 2 ms |
| Backplane Current Draw (5V DC) | 75 mA |
| Power Dissipation | 1.8 W max |
| Operating Temperature | 0°C to +60°C (32°F to 140°F) |
| Storage Temperature | -40°C to +85°C |
| Relative Humidity | 5–95% non-condensing |
| Enclosure Rating | IP20 (panel mount) |
| Wiring Type | Removable terminal block (RTB) |
| Dimensions (H × W × D) | 90 × 40 × 87 mm (approx.) |
| Weight | Approx. 250 g |
| Certifications | UL, CE, CSA, RCM |
Why Engineers Specify This Model
- Seamless MicroLogix Expansion — The 1762-IQ8 connects directly to the MicroLogix 1100/1400 expansion bus without additional adapters, preserving the compact DIN-rail footprint and simplifying panel layout.
- IEC Type 1 Sourcing Inputs — Compliant with IEC 61131-2 Type 1 input specifications, ensuring compatibility with the broad ecosystem of 24V DC PNP sensors used in modern machine design.
- Optical Isolation — Field-side optical isolation protects the controller backplane from voltage transients, ground loops, and electrical noise common in motor-heavy environments.
- Fast Response Time — Sub-2 ms ON/OFF response supports high-speed discrete event detection without requiring hardware interrupt modules in most standard applications.
- Removable Terminal Block — The RTB design allows field wiring to remain in place during module replacement, minimizing downtime during maintenance or module swap-out.
- Proven Platform Longevity — The MicroLogix 1762 I/O family has an extensive installed base globally, with broad availability of replacement modules and documented migration paths to newer Micro800 platforms.
Complete System Bill of Materials
A typical MicroLogix-based discrete control system incorporating the 1762-IQ8 includes the following components:
| Component | Part Number | Description |
| PLC Controller | 1763-L16BWA / 1766-L32BWA | MicroLogix 1100 / 1400 Base Unit |
| Digital Input Module | 1762-IQ8 | 8-Point 24V DC Sourcing Input (this module) |
| Digital Output Module | 1762-OW8 | 8-Point Relay Output Module |
| Digital Output Module | 1762-OB8 | 8-Point 24V DC Transistor Output Module |
| Analog Input Module | 1762-IF4 | 4-Channel Analog Input Module |
| Power Supply | 1606-XLP30E | 24V DC / 1.3A DIN-Rail Power Supply |
| Programming Software | 9324-RL0300ENE | RSLogix 500 / Studio 5000 Logix Designer |
| Communication Cable | 1761-CBL-PM02 | RS-232 Programming Cable |
| DIN Rail | 199-DR1 | 35 mm DIN Rail (per meter) |
Compliance & Industry Standards
- 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)
- RCM Mark — Australian/New Zealand regulatory compliance
- IEC 61131-2 — Programmable Controller Equipment standard, Type 1 input compliance
- RoHS Compliant — Restriction of Hazardous Substances Directive 2011/65/EU
- ATEX / Class I Div 2 — Suitable for use in non-incendive (NI) classified locations when installed per Rockwell Automation installation instructions (verify with local AHJ)
Quality Assurance & Sourcing
Konmask.com specializes in the procurement and supply of industrial automation components for MRO (Maintenance, Repair & Operations) and project-based purchasing. Every 1762-IQ8 unit offered through our platform is subject to the following quality controls:
- Authenticity Verification — Units are sourced from authorized distributors, certified resellers, or verified surplus channels with full traceability documentation available upon request.
- Pre-Shipment Inspection — Physical inspection of label integrity, firmware revision markings, terminal block condition, and housing for signs of counterfeit or refurbishment.
- Functional Testing (where applicable) — Surplus and refurbished units undergo bench-level power-on and I/O point verification prior to dispatch.
- Packaging Standards — Anti-static packaging with moisture barrier bags and foam cushioning for international shipment protection.
- Documentation — Certificate of conformance, packing list, and optional third-party inspection reports available for project and EPC procurement requirements.
How to Source This Part
Konmask.com maintains stock of the 1762-IQ8 for immediate dispatch. For project quantities, long-lead procurement, or multi-line BOM sourcing, our team provides dedicated support:
- Single Unit / MRO Orders — Add to cart and check out directly. Orders placed before 14:00 CST ship same business day.
- Project / BOM Quantities (5+ units) — Contact our sales team for volume pricing, lead time confirmation, and consolidated BOM quotation.
- Emergency / Downtime Orders — Priority handling available. Contact us directly at support@konmask.com or +0086 19859288691 for expedited processing.
- Cross-Border / Export Orders — We ship to Asia-Pacific, Middle East, Southeast Asia, and select European destinations. Export documentation and commercial invoices provided.
Application-Specific FAQ
Q: Is the 1762-IQ8 compatible with MicroLogix 1000 or 1200 controllers?
A: No. The 1762 I/O series is exclusively compatible with MicroLogix 1100 and 1400 platforms. MicroLogix 1000 and 1200 use the 1762-series bus but require different expansion modules — verify your controller catalog number before ordering.
Q: Can I mix 1762-IQ8 modules with other 1762-series I/O on the same controller?
A: Yes. MicroLogix 1100 supports up to 4 expansion modules; MicroLogix 1400 supports up to 7. The 1762-IQ8 can be combined with output, analog, and specialty modules in any order on the expansion bus.
Q: What sensor types are compatible with the 1762-IQ8 inputs?
A: The module accepts 24V DC PNP (sourcing) sensors. NPN (sinking) sensors are not directly compatible without a signal converter. Dry-contact inputs (switches, relays) are supported when wired with an external 24V DC supply.
Q: What is the maximum cable length for field wiring to the 1762-IQ8?
A: Rockwell Automation recommends a maximum of 30 meters (100 ft) for unshielded wiring in standard industrial environments. Shielded cable is recommended in high-noise environments; ground the shield at one end only.
Q: Is a replacement terminal block available separately?
A: Yes. The removable terminal block (RTB) for the 1762-IQ8 is available as a separate spare part. Contact Konmask.com with your requirement for availability and pricing.
Q: What is the difference between 1762-IQ8 and 1762-IQ8OW6I?
A: The 1762-IQ8OW6I is a combination module offering 8 DC inputs and 6 relay outputs in a single housing — suitable for applications where panel space is constrained. The 1762-IQ8 is a dedicated input-only module, preferred when output capacity is already provided by other modules in the system.
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