Allen-Bradley 1771-SDN DeviceNet Scanner Module – 1771 I/O Platform
Imagine a DeviceNet network with dozens of drives, sensors, and valve manifolds — all operating blind, with no master to poll device status, no path to deliver control commands, and no way to surface faults before a line stoppage cascades into hours of unplanned downtime. Without a dedicated scanner module, your PLC-5 chassis has no voice on the DeviceNet bus. The Allen-Bradley 1771-SDN is that voice: a single-slot I/O module that transforms a 1771 chassis into a fully capable DeviceNet master, giving your control system real-time visibility and command authority over every node on the network.
Within the 1771 I/O family, the 1771-SDN occupies the role of network gateway — bridging the deterministic scan cycle of a PLC-5 processor with the open, multi-vendor DeviceNet fieldbus. Introduced as DeviceNet adoption accelerated across discrete manufacturing in the 1990s, this module became a cornerstone of Allen-Bradley’s open-network strategy and remains widely deployed in automotive assembly, material handling, and process control installations worldwide. Its continued presence in global spare-parts markets reflects both the longevity of PLC-5 infrastructure and the module’s proven reliability in demanding industrial environments.
Technical Specifications
- Part Number: 1771-SDN
- Platform: Allen-Bradley 1771 I/O (PLC-5 compatible)
- Network Protocol: DeviceNet (CAN-based, IEC 62026-3)
- Node Capacity: Up to 64 DeviceNet nodes (addresses 0–63)
- Data Table Size: 8 KB input / 8 KB output
- Module Slot Width: Single-slot 1771 I/O chassis
- Backplane Communication: 1771 parallel I/O backplane
- DeviceNet Data Rate: 125 Kbps / 250 Kbps / 500 Kbps (selectable)
- Power Consumption: Supplied via 1771 I/O chassis backplane
- 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
- Certifications: UL, CE (refer to product documentation for current listings)
- Form Factor: Standard 1771 single-slot module
Note: Specifications are sourced from Allen-Bradley/Rockwell Automation published documentation. Always verify against the official product manual (Publication 1771-UM005) for your specific firmware revision.
Key Features & Benefits
- Master/Scanner Role: Acts as Class 1 DeviceNet master, polling up to 64 slave devices in a single scan — drives, sensors, photoelectrics, valve banks, and more.
- Polled, Strobe & Change-of-State Messaging: Supports all three DeviceNet I/O messaging types, enabling you to balance network bandwidth against response-time requirements.
- Explicit Messaging: Allows the PLC-5 ladder program to read/write device parameters on demand — ideal for drive configuration, diagnostics, and recipe management without leaving the control program.
- RSNetWorx for DeviceNet Compatible: Full integration with Rockwell’s network configuration tool for node commissioning, EDS file management, and online diagnostics.
- Fault Isolation: Per-node fault reporting mapped directly into the PLC-5 data table, enabling targeted fault response logic rather than blanket shutdowns.
- Single-Slot Footprint: Maximises chassis density — critical in legacy PLC-5 racks where slot real estate is finite.
- Multi-Vendor Interoperability: DeviceNet’s open standard means the 1771-SDN can communicate with devices from any vendor that holds ODVA conformance certification.
Industry & Equipment Applications
- Automotive Assembly: Body-in-white welding lines, transfer presses, and paint-shop conveyor systems where PLC-5 controllers manage large populations of DeviceNet drives and I/O blocks.
- Material Handling: Sortation systems, palletisers, and automated storage/retrieval systems (AS/RS) relying on distributed motor starters and photoelectric sensors on DeviceNet.
- Food & Beverage: Packaging lines and filling machines where hygienic DeviceNet valve manifolds and distributed I/O are controlled from a central PLC-5 rack.
- Oil & Gas / Petrochemical: Wellhead control panels and compressor skids with legacy PLC-5 infrastructure requiring continued DeviceNet network support.
- Water & Wastewater: Pump station control panels where PLC-5 systems manage DeviceNet-connected motor protection relays and level sensors.
- General Discrete Manufacturing: Any PLC-5-based machine or line that uses DeviceNet as its device-level fieldbus.
System Integration & Compatible Parts
The 1771-SDN is designed for use within Allen-Bradley 1771 I/O chassis paired with PLC-5 processors. Typical system components include:
- Processors: PLC-5/11, PLC-5/20, PLC-5/30, PLC-5/40, PLC-5/60, PLC-5/80 (and Enhanced series equivalents)
- Chassis: 1771-A1B, 1771-A2B, 1771-A3B, 1771-A4B series I/O chassis
- Power Supplies: 1771-P4, 1771-P4S, 1771-P6, 1771-P7 series
- DeviceNet Cable & Taps: 1485 series thick/thin cable, 1485T taps, and 1485P power taps
- DeviceNet Power Supply: 1787-DNPS or equivalent 24 VDC network power supply
- Configuration Software: RSNetWorx for DeviceNet (v4.x and above recommended)
- Related Scanner Modules: 1771-ACN15 (ControlNet), 1771-ASB (Remote I/O adapter) for multi-network architectures
Our Quality Assurance Process
Every 1771-SDN unit shipped from Konmask.com passes through a structured inspection protocol before dispatch:
- Visual Inspection: Board-level examination for physical damage, corrosion, bent connector pins, and label integrity.
- Functional Power-On Test: Module is energised in a 1771 test chassis to verify backplane communication and LED status indicators respond correctly.
- Firmware Version Logging: Firmware revision is recorded and disclosed in the shipment documentation so your engineering team can plan any required upgrades.
- ESD-Safe Packaging: Modules are packed in anti-static bags with foam cushioning inside double-wall cartons rated for international air and sea freight.
- Traceability: Each unit is assigned a Konmask internal inspection record, available on request for your incoming-goods documentation.
How to Order
- Submit an enquiry via the “Request a Quote” button on this page, or email support@konmask.com.
- Provide your required quantity, preferred delivery timeline, and destination country/port.
- Our technical team will confirm stock availability, firmware revision, and lead time within one business day.
- Upon agreement, we issue a proforma invoice. Payment terms are discussed at this stage (T/T, L/C, and other methods available).
- After payment confirmation, the unit is inspected, packed, and dispatched with full shipping documentation (commercial invoice, packing list, and certificate of conformance where applicable).
Why Choose Konmask.com?
- Industrial Automation Specialists: We focus exclusively on PLC, DCS, and industrial network components — not a general electronics distributor.
- Global Sourcing Network: Access to surplus, refurbished, and new-old-stock (NOS) inventory from verified industrial suppliers worldwide.
- Technical Pre-Sales Support: Our team includes engineers with hands-on PLC-5 and DeviceNet experience who can advise on compatibility and integration.
- Fast Response: Enquiries answered within 24 hours; urgent requirements accommodated where stock permits.
- Transparent Documentation: Firmware revision, inspection records, and test reports provided with every shipment.
- Worldwide Shipping: DHL, FedEx, and sea freight options to over 100 countries, with full export documentation support.
Frequently Asked Questions
Q: Is the 1771-SDN compatible with all PLC-5 processor variants?
A: The 1771-SDN is compatible with all PLC-5 processors that support the 1771 I/O backplane, including the standard and Enhanced (E-series) variants. Confirm your processor’s I/O chassis slot addressing mode (1/2-slot or 1-slot) matches the module’s configuration before installation.
Q: What is the maximum number of DeviceNet nodes the 1771-SDN can manage?
A: The module supports up to 64 nodes (MAC IDs 0–63). The scanner itself typically occupies one MAC ID, leaving 63 available for slave devices.
Q: Can the 1771-SDN be used as a DeviceNet slave/adapter?
A: No. The 1771-SDN is a scanner (master) module only. If you require a DeviceNet adapter for a 1771 chassis, a different module is needed.
Q: What software is required to configure the 1771-SDN?
A: RSNetWorx for DeviceNet is the standard configuration tool. The module’s scan list, I/O mapping, and node parameters are configured offline and downloaded via the DeviceNet network or through the PLC-5 data table.
Q: Do you supply the 1771-SDN with a warranty?
A: Yes. All units are covered by Konmask’s standard warranty against defects identified within the inspection and test process. Specific warranty terms are confirmed at the time of quotation.
Q: Can you source specific firmware revisions of the 1771-SDN?
A: We disclose the firmware revision of available stock. If a specific revision is required for compatibility with your existing system, please state this in your enquiry and we will do our best to match it.
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Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
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