Remote I/O Scanner Solution – Allen-Bradley 1775-SR | PLC-3 Series
Where This Product Is Used
The Allen-Bradley 1775-SR Scanner Communications Module is deployed in demanding industrial environments where reliable remote I/O communication is critical. Engineers specify this module in the following applications:
- Automotive Assembly Lines — Coordinating distributed I/O racks across body-in-white welding stations and paint shop conveyors.
- Food & Beverage Processing Plants — Managing remote sensor and actuator nodes in hygienic zones where the PLC cabinet must be located away from the process area.
- Water & Wastewater Treatment Facilities — Linking remote pump stations and valve manifolds back to a central PLC-3 processor over a dedicated scanner link.
- Pulp & Paper Mills — Controlling distributed drive panels and field I/O in high-noise, high-vibration environments.
- Chemical & Petrochemical Plants — Extending PLC-3 control reach to remote I/O drops in classified hazardous areas (with appropriate barriers).
- Material Handling & Conveyor Systems — Synchronising sorters, diverters, and accumulation zones across large warehouse footprints.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 1775-SR |
| Manufacturer | Allen-Bradley (Rockwell Automation) |
| Product Family | PLC-3 Series |
| Module Type | Scanner Communications Module |
| Communication Protocol | Remote I/O (RIO) — 1771 I/O chassis compatible |
| Data Transfer Rate | 57.6 kbps / 115.2 kbps / 230.4 kbps (selectable) |
| Maximum I/O Drops | Up to 32 I/O racks (128 I/O groups) |
| Backplane Interface | PLC-3 processor chassis (1775 series) |
| Power Consumption | Supplied via chassis backplane |
| Operating Temperature | 0 °C to +60 °C |
| Storage Temperature | -40 °C to +85 °C |
| Relative Humidity | 5% to 95% non-condensing |
| Weight | Approx. 2.3 kg |
| Form Factor | Single-slot PLC-3 chassis module |
Note: Specifications are based on Allen-Bradley published documentation. Verify against your specific revision level before integration.
Why Engineers Specify This Model
- Proven RIO Architecture — The 1775-SR implements Allen-Bradley’s battle-tested Remote I/O protocol, offering deterministic scan times and robust noise immunity on the factory floor.
- High I/O Density — Supports up to 32 remote I/O racks, enabling large-scale distributed control without additional communication hardware.
- Selectable Baud Rates — Field-configurable data rates allow engineers to balance scan speed against cable distance requirements.
- Seamless PLC-3 Integration — Designed as a native backplane module; no external interface converters or protocol gateways required.
- Long Service Life — Rockwell Automation’s PLC-3 platform has an extensive installed base; the 1775-SR remains a critical spare and upgrade component for legacy system maintenance.
- Simplified Diagnostics — Onboard status indicators provide immediate visual feedback on scanner link health, reducing MTTR during fault conditions.
Complete System Bill of Materials
A typical PLC-3 remote I/O system using the 1775-SR includes the following components:
- 1775-SR — Scanner Communications Module (this item)
- 1775-Lx — PLC-3 Processor Module (e.g., 1775-L1, 1775-L2)
- 1775-Ax — PLC-3 Chassis & Power Supply
- 1771-ASB — Remote I/O Adapter Module (installed in each remote I/O chassis)
- 1771-Ax — Remote I/O Chassis (1771 series, 4/8/12/16 slot)
- 1770-CD — Belden 9463 Twinaxial Cable (Remote I/O trunk cable)
- 1771-WN — Remote I/O Terminating Resistor (end-of-line termination)
- 1785-ME16 or equivalent — EEPROM Memory Module for program backup
Contact support@konmask.com to source any of the above companion parts.
Compliance & Industry Standards
- UL Listed — Meets UL 508 (Industrial Control Equipment) requirements.
- CE Marked — Compliant with applicable EU directives for industrial machinery.
- RoHS — Original Allen-Bradley production units; RoHS status subject to manufacturing date — confirm with our team if required for your project.
- IEC 61131-2 — Programmable controller hardware conformance (applicable to PLC-3 platform).
- NEMA / IEC Enclosure Compatibility — Designed for installation within NEMA 12 or IEC IP54 (or better) control enclosures.
Quality Assurance & Sourcing
Konmask.com specialises in the procurement of genuine, tested industrial automation components for legacy and current-generation control systems. Every 1775-SR unit we supply undergoes the following process:
- Visual Inspection — Board-level examination for physical damage, corrosion, or counterfeit indicators.
- Functional Verification — Where test equipment is available, modules are bench-tested for backplane communication integrity.
- Traceability Documentation — Serial number and revision level recorded at intake; documentation available on request.
- Secure Packaging — Anti-static packaging with foam cushioning; shipped in double-wall corrugated cartons.
- 90-Day Warranty — All units carry a 90-day warranty against defects in materials and workmanship under normal operating conditions.
How to Source This Part
- Add to Cart — Click the purchase button above to place an order directly through Konmask.com.
- Request a Quote — For volume orders (>3 units) or urgent requirements, email support@konmask.com with your required quantity and delivery timeline.
- WhatsApp / Phone — Reach our technical sales team directly at +0086 19859288691 for same-day response on availability and lead time.
- Provide Your PO — We accept purchase orders from registered companies. Contact us to set up a net-terms account.
- Shipping — We ship worldwide via DHL, FedEx, and UPS Express. Export documentation (commercial invoice, packing list, COO) provided for all international shipments.
Application-Specific FAQ
Q: Is the 1775-SR compatible with PLC-5 processors?
A: No. The 1775-SR is designed exclusively for the PLC-3 chassis backplane. For PLC-5 remote I/O scanning, the correct module is the 1771-SN or 1785-SN series. Contact us if you need assistance identifying the correct scanner for your platform.
Q: Can the 1775-SR communicate with 1771 I/O modules directly?
A: Yes — via a 1771-ASB Remote I/O Adapter installed in each remote I/O chassis. The 1775-SR acts as the scanner (master) and the 1771-ASB acts as the adapter (slave) on the RIO link.
Q: What is the maximum cable distance for the Remote I/O link?
A: Maximum trunk cable length depends on baud rate: up to 3,048 m (10,000 ft) at 57.6 kbps, 1,524 m (5,000 ft) at 115.2 kbps, and 762 m (2,500 ft) at 230.4 kbps, using Belden 9463 or equivalent twinaxial cable.
Q: Do you supply the 1775-SR with a warranty?
A: Yes. All units supplied by Konmask.com carry a 90-day warranty. Extended warranty options are available — enquire at the time of order.
Q: Can you supply the matching 1771-ASB adapter modules?
A: Yes. We stock a range of PLC-3 and 1771 series companion parts. Email support@konmask.com with your full BOM for a consolidated quote.
Q: Is this a new or refurbished unit?
A: Stock condition (new surplus, refurbished, or used-tested) varies by availability. Current condition is disclosed at the time of quotation. All units are functionally verified before dispatch.
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Contact: support@konmask.com | +0086 19859288691
