Remote I/O Adapter Solution – Allen-Bradley 1771-ASB/E | 1771 Series
Where This Product Is Used
The Allen-Bradley 1771-ASB/E Remote I/O Adapter Module is deployed across a wide range of industrial automation environments where distributed I/O communication over Allen-Bradley’s Remote I/O (RIO) network is required. Typical application scenarios include:
- Automotive Assembly Lines – Connects remote I/O chassis on body-in-white welding stations and paint shop conveyors to a central PLC-5 controller, enabling real-time discrete I/O monitoring across long cable runs.
- Food & Beverage Processing Plants – Used in bottling, filling, and packaging lines where hygienic remote I/O drops must communicate reliably with a host PLC over distances up to 3,048 m (10,000 ft).
- Water & Wastewater Treatment Facilities – Installed in remote pump stations and lift stations to extend PLC-5 I/O capacity without running individual signal cables back to the main control panel.
- Oil & Gas Upstream/Midstream – Deployed in wellhead control panels and pipeline SCADA nodes where the 1771 chassis must interface with a host scanner over a shielded twisted-pair RIO link.
- Pulp & Paper Mills – Manages distributed I/O drops on winder, coater, and dryer sections, reducing wiring complexity in large-footprint process areas.
- Mining & Minerals Processing – Provides robust remote I/O communication in high-vibration, high-dust environments typical of crusher, conveyor, and flotation cell control systems.
- Pharmaceutical Manufacturing – Supports validated PLC-5 control architectures in filling and packaging suites where legacy RIO infrastructure must remain in service.
Technical Specifications
| Parameter | Value |
|---|---|
| Catalog Number | 1771-ASB/E |
| Series | E |
| Product Family | 1771 PLC-5 I/O Platform |
| Module Type | Remote I/O Adapter (Slave) |
| Communication Protocol | Allen-Bradley Remote I/O (RIO) – 57.6K / 115.2K / 230.4K baud |
| Chassis Compatibility | 1771 I/O Chassis (all slot widths) |
| Max I/O Chassis per Drop | Up to 2 chassis (primary + complementary) |
| Max Cable Distance | 3,048 m (10,000 ft) at 57.6K baud |
| Backplane Current Draw | 800 mA @ 5 VDC |
| Operating Temperature | 0 °C to +60 °C (32 °F to 140 °F) |
| Storage Temperature | -40 °C to +85 °C |
| Relative Humidity | 5% to 95% non-condensing |
| Weight | Approx. 450 g |
| Enclosure Rating | Open (requires enclosure) |
| Agency Certifications | UL, CSA, CE |
Why Engineers Specify This Model
- Series E Enhancements – The /E revision incorporates improved noise immunity and enhanced diagnostic LEDs compared to earlier series, reducing nuisance faults in electrically noisy environments.
- Flexible Baud Rate Selection – DIP-switch selectable baud rates (57.6K, 115.2K, 230.4K) allow engineers to balance cable distance against scan time requirements without additional hardware.
- Dual-Chassis Support – A single 1771-ASB/E can serve a primary and a complementary chassis, doubling the I/O density per RIO drop and reducing the number of adapter modules required.
- Drop Address Configurability – Supports up to 31 drop addresses on a single RIO link, providing maximum flexibility for large distributed control architectures.
- Proven Legacy Reliability – Widely deployed in PLC-5 systems with decades of field history; a preferred choice for brownfield expansions and life-extension projects where RIO infrastructure is already in place.
- Direct Backplane Interface – Plugs directly into the 1771 chassis backplane with no external power supply required for the adapter itself, simplifying panel design.
Complete System Bill of Materials
A typical remote I/O drop using the 1771-ASB/E includes the following components:
- 1771-ASB/E – Remote I/O Adapter Module (this item)
- 1771-A1B / 1771-A2B / 1771-A3B / 1771-A4B – 1771 I/O Chassis (select slot count)
- 1771-P4S / 1771-P7 – Chassis Power Supply
- 1746-C9 / Belden 9463 – Shielded Twisted-Pair RIO Cable
- 1771-WN – Chassis Keying Bands (for I/O modules)
- PLC-5 Host Controller with 1771-SN or 1771-DCM Scanner Module
- Applicable 1771 discrete or analog I/O modules (e.g., 1771-IB, 1771-OB, 1771-IF4)
Compliance & Industry Standards
- UL Listed – UL 508 (Industrial Control Equipment)
- CSA Certified – CSA C22.2 No. 142
- CE Marked – Compliant with EU Low Voltage Directive and EMC Directive
- RoHS – Evaluated per applicable revision at time of manufacture
- IEC 61131-2 – Programmable Controller Equipment standard compliance
Quality Assurance & Sourcing
Every 1771-ASB/E unit offered by Konmask.com undergoes a structured inspection process before shipment:
- Visual inspection for physical damage, corrosion, and component integrity
- Firmware/series revision verification against catalog number
- Functional power-on test where applicable
- Anti-static packaging with humidity indicator card
- Traceable documentation available upon request
We source from decommissioned OEM lines, authorized surplus channels, and verified industrial distributors. Counterfeit-risk screening is applied to all high-demand catalog numbers.
How to Source This Part
- Add to Cart – Click Add to Cart for standard checkout with HKD pricing.
- Request a Quote – Email support@konmask.com for volume pricing, lead time confirmation, or multi-line BOM sourcing.
- Expedite Orders – Call or WhatsApp +0086 19859288691 for urgent requirements. We support air freight and same-day dispatch for in-stock units.
- BOM Sourcing – Submit your full parts list and we will return availability and pricing across all line items.
Application-Specific FAQ
Q: Is the 1771-ASB/E compatible with ControlLogix or CompactLogix controllers?
A: Not natively. The 1771-ASB/E is designed for Allen-Bradley Remote I/O (RIO) networks hosted by PLC-5 or SLC-500 systems with a compatible scanner. ControlLogix can communicate with RIO via the 1756-DHRIO or 1756-RIO bridge modules.
Q: What is the maximum number of I/O points per drop?
A: Each 1771-ASB/E drop supports up to 128 discrete I/O points (8 groups × 16 bits) across the connected chassis.
Q: Can I mix discrete and analog modules in the same chassis served by a 1771-ASB/E?
A: Yes. The 1771-ASB/E supports both discrete and analog 1771 I/O modules in the same chassis, subject to chassis power supply capacity.
Q: What cable type is required for the RIO link?
A: Allen-Bradley specifies Belden 9463 (or equivalent) shielded, twisted-pair, blue hose cable for Remote I/O networks. Proper termination resistors (82–150 Ω) must be installed at both ends of the network.
Q: Is a replacement or refurbished 1771-ASB/E a viable option for a life-extension project?
A: Yes. Given that the 1771 platform is in the Rockwell Automation End-of-Life phase, sourcing tested surplus units is the standard industry practice for maintaining existing RIO-based systems without a full migration.
Q: Do you provide a warranty?
A: Yes. Konmask.com provides a limited warranty on all tested units. Contact us for specific terms applicable to your order.
© 2026 Konmask.com. All rights reserved.
Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
