Discrete Input Control Solution — Allen-Bradley 1771-IBN/C | PLC-5 Series
The Allen-Bradley 1771-IBN/C is a 16-point, 24VDC DC discrete input module designed for the PLC-5 I/O chassis. It serves as the critical interface between field-level sensors, switches, and pushbuttons and the PLC-5 processor, enabling reliable real-time signal acquisition in demanding industrial environments. Sourced, tested, and stocked by Konmask.com — your specialist in legacy and current-generation automation hardware.
Where This Product Is Used
The 1771-IBN/C is deployed across a wide range of discrete control applications where 24VDC field devices must interface with a PLC-5 backplane:
- Automotive Assembly Lines — Proximity sensor feedback for part-present detection, conveyor indexing, and robotic cell interlocks.
- Food & Beverage Processing — Limit switch inputs for filling, capping, and labeling machine sequencing.
- Water & Wastewater Treatment — Float switch and level sensor inputs for pump station control and overflow protection.
- Oil & Gas Facilities — Valve position feedback and emergency shutdown (ESD) signal acquisition.
- Pulp & Paper Mills — Roll position sensing and web break detection on continuous process lines.
- Material Handling & Warehousing — Photoelectric sensor inputs for sortation, palletizing, and conveyor routing logic.
- HVAC & Building Automation — Damper position, door interlock, and airflow switch monitoring in legacy BAS panels.
- Mining & Minerals Processing — Belt alignment switch and chute blockage detection in harsh, high-vibration environments.
Technical Specifications
- Catalog Number: 1771-IBN/C
- Module Type: DC Discrete Input
- Number of Input Points: 16
- Input Voltage: 24VDC
- Input Current (per point): 8 mA nominal
- ON-State Voltage Range: 14–30 VDC
- OFF-State Voltage Range: 0–5 VDC
- Input Delay (filter time): 1 ms (hardware)
- Isolation: Optical isolation between field and backplane
- Backplane Current Draw: 800 mA @ 5VDC
- 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
- Wiring: 1771-WN wiring arm (sold separately)
- Chassis Compatibility: 1771 I/O chassis (all sizes)
- Dimensions (H × W × D): Single-slot module
- Weight: 500 g (approx.)
- Series: C
Why Engineers Specify This Model
- Proven Field Reliability — The 1771-IBN/C has decades of documented service in continuous-process and discrete manufacturing environments. Its optical isolation architecture protects the PLC-5 backplane from field-side transients and ground loops.
- 24VDC Standard Compatibility — 24VDC is the global standard for industrial field devices. This module interfaces directly with the overwhelming majority of proximity sensors, limit switches, and pushbutton stations without additional signal conditioning.
- Series C Improvements — The /C revision incorporates enhanced noise immunity and tighter input threshold tolerances compared to earlier series, reducing nuisance trips in electrically noisy environments.
- Drop-in Replacement — Fully backward-compatible with 1771-IBN/A and /B installations. No processor program changes required when replacing earlier series modules.
- Minimized Downtime Risk — Single-slot form factor allows hot-swap replacement in most PLC-5 chassis configurations, minimizing production interruption during maintenance.
Complete System Bill of Materials
A fully operational 1771-IBN/C installation typically requires the following components:
- 1771-IBN/C — This module (discrete input, 16-point, 24VDC)
- 1771-WN — Wiring arm / terminal block for field wiring termination
- 1771-Axx — 1771 I/O chassis (e.g., 1771-A1B, 1771-A2B, 1771-A3B, 1771-A4B depending on slot count)
- 1771-P4S / 1771-P6S — I/O chassis power supply
- 1785-Lxx — PLC-5 processor (e.g., 1785-L20, 1785-L40, 1785-L80)
- 1771-SN / 1771-ASB — Remote I/O scanner or adapter (for remote rack configurations)
- 24VDC Field Power Supply — For powering field sensors and input devices
Contact Konmask.com for bundle pricing on multi-component orders.
Compliance & Industry Standards
- UL Listed — UL 508 (Industrial Control Equipment)
- CE Marked — Compliant with EU Low Voltage Directive and EMC Directive
- RoHS — Compliant (Series C)
- ATEX / IECEx — Not rated for intrinsically safe or hazardous area use in standard configuration; consult Konmask for barrier-isolated variants
- IEC 61131-2 — Meets programmable controller input module requirements
- FCC Part 15 Class A — Emissions compliance for industrial environments
Quality Assurance & Sourcing
Every 1771-IBN/C unit shipped by Konmask.com undergoes the following quality process:
- Visual Inspection — Board-level inspection for physical damage, corrosion, and component integrity.
- Functional Power-On Test — Module is seated in a live 1771 chassis and all 16 input points are exercised with a 24VDC test signal.
- Backplane Communication Verification — Input data table mapping is confirmed against the PLC-5 processor I/O image.
- Firmware / Series Verification — Series revision is confirmed and documented on the shipping label.
- ESD-Safe Packaging — Shipped in anti-static bags with foam cushioning inside a double-wall carton.
Konmask.com sources from authorized distributors, OEM overstock, and decommissioned industrial facilities. All units are sold as tested used / refurbished unless explicitly listed as new-in-box (NIB). Condition is clearly stated on each listing.
How to Source This Part
- Add to Cart — Click the purchase button above. Stock is limited; availability is real-time.
- Request a Quote — For quantities of 2 or more, email support@konmask.com for volume pricing.
- Verify Compatibility — Provide your chassis catalog number and PLC-5 processor series if you need a compatibility confirmation before ordering.
- Expedited Shipping — Same-day dispatch available for orders placed before 14:00 CST on business days. DHL Express, FedEx International Priority, and sea freight options available.
- Export Documentation — Commercial invoice, packing list, and certificate of origin provided for all international shipments. HS Code: 8537.10.
Application-Specific FAQ
Q: Can the 1771-IBN/C accept 120VAC inputs?
A: No. The 1771-IBN/C is rated for 24VDC inputs only. For 120VAC field devices, specify the 1771-IAD (120VAC input module) instead.
Q: Is this module compatible with the PLC-5/11, PLC-5/20, PLC-5/40, and PLC-5/80?
A: Yes. The 1771-IBN/C is compatible with all PLC-5 processor families that use the 1771 I/O chassis backplane.
Q: Can I use this module in a 1771 remote I/O rack?
A: Yes, when used with a 1771-ASB remote I/O adapter. The module functions identically in local and remote rack configurations.
Q: What is the maximum cable length from field devices to the wiring arm?
A: Rockwell Automation recommends a maximum of 1,000 feet (305 m) for 24VDC field wiring, subject to wire gauge and voltage drop calculations.
Q: Do you offer a warranty?
A: Yes. Konmask.com provides a 90-day functional warranty on all tested units. If the module fails functional testing upon receipt, we will replace or refund — no questions asked.
Q: Can you supply the matching 1771-WN wiring arm?
A: Yes. Contact us to add a 1771-WN to your order. Bundle pricing is available.
Q: Is this product export-controlled (EAR/ECCN)?
A: The 1771-IBN/C is classified as EAR99 (no export license required for most destinations). Konmask.com will advise if your destination country requires additional documentation.
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Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
