Allen-Bradley 1747-SDN DeviceNet Scanner Module | Replacement, Equivalent & Selection Guide
The Allen-Bradley 1747-SDN is a DeviceNet Scanner Module designed for use in the SLC 500 chassis. It enables the SLC 500 processor to act as a DeviceNet master (scanner), communicating with up to 63 DeviceNet slave devices on a single network segment. This page provides full technical specifications, compatible replacement options, application guidance, and a structured selection guide to help engineers and procurement teams make confident sourcing decisions.
Technical Specifications
- Part Number: 1747-SDN
- Manufacturer: Allen-Bradley / Rockwell Automation
- Module Type: DeviceNet Scanner (Master)
- Compatible Chassis: SLC 500 (1746 series)
- Network Protocol: DeviceNet (CAN-based, IEC 62026-3)
- Max Slave Nodes: 63 nodes per network
- Data Table Size: Up to 248 bytes input / 248 bytes output
- Baud Rates: 125 Kbps, 250 Kbps, 500 Kbps
- Power Consumption: 800 mA @ 5 VDC (from 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)
- Dimensions: Single-slot SLC 500 module
- Weight: Approx. 500 g
- Certifications: UL, CE, DeviceNet Conformance Tested
- Firmware: Field-upgradeable via RSNetWorx for DeviceNet
Compatible Replacement & Equivalent Models
When the 1747-SDN is unavailable, end-of-life, or cost-prohibitive, the following alternatives are commonly evaluated. Always verify firmware compatibility and I/O mapping before substitution.
| Model | Manufacturer | Platform | Notes |
|---|---|---|---|
| 1747-SDN/B | Allen-Bradley | SLC 500 | Revised firmware version; direct drop-in replacement |
| 1756-DNB | Allen-Bradley | ControlLogix | Upgrade path for ControlLogix migration; not pin-compatible |
| 1769-SDN | Allen-Bradley | CompactLogix / MicroLogix 1500 | Compact I/O form factor; suitable for smaller systems |
| DN-151 | Hilscher | Universal (gateway) | Third-party DeviceNet master gateway; requires EDS configuration |
| PCDNS-104 | ProSoft Technology | SLC 500 compatible | Third-party scanner; verify I/O table mapping with integrator |
Note: Third-party replacements may require additional configuration. Konmask recommends testing in a non-production environment before deployment.
Why Choose the Original 1747-SDN
- Native Rockwell Integration: Fully supported by RSNetWorx for DeviceNet and RSLogix 500 — zero third-party middleware required.
- Proven Reliability: Deployed in thousands of industrial installations globally across automotive, food & beverage, and material handling sectors.
- Seamless Firmware Updates: Field-upgradeable firmware ensures long-term compatibility with evolving DeviceNet device profiles.
- Guaranteed I/O Mapping: Native SLC 500 backplane communication eliminates translation latency and mapping errors common in third-party alternatives.
- OEM Warranty & Support: Eligible for Rockwell Automation TechConnect support contracts.
Typical Applications
- Conveyor and material handling control systems using DeviceNet drives and sensors
- Automotive assembly line PLC networks with distributed I/O blocks
- Food & beverage packaging lines integrating DeviceNet-compatible actuators and vision systems
- Water/wastewater treatment facilities with distributed field device networks
- Machine tool control panels requiring centralized SLC 500 DeviceNet master coordination
- Retrofit and modernization projects maintaining existing DeviceNet infrastructure
System Compatibility
- Chassis: All SLC 500 chassis (4-slot, 7-slot, 10-slot, 13-slot)
- Processors: SLC 5/02, 5/03, 5/04, 5/05 (with appropriate firmware)
- Software: RSLogix 500, RSNetWorx for DeviceNet, Studio 5000 (via legacy bridge)
- Network Topology: Trunk-line/drop-line, daisy-chain, star (with active tap)
- Cable: DeviceNet thick cable (trunk), thin cable (drop), flat cable
- Termination: 121 Ω resistors required at both ends of trunk line
Selection Guide
Use the decision matrix below to determine whether the 1747-SDN is the right module for your application:
| Requirement | 1747-SDN | 1756-DNB | 1769-SDN |
|---|---|---|---|
| Existing SLC 500 chassis | ✅ Native fit | ❌ Requires ControlLogix | ⚠️ Compact I/O only |
| Up to 63 DeviceNet nodes | ✅ | ✅ | ✅ |
| RSLogix 500 programming | ✅ | ❌ Studio 5000 | ⚠️ RSLogix 500 / Studio 5000 |
| Budget-sensitive retrofit | ✅ Best value | ❌ Higher platform cost | ✅ Competitive |
| Future ControlLogix migration | ⚠️ Plan migration | ✅ Future-ready | ⚠️ Partial path |
Recommendation: For existing SLC 500 systems requiring DeviceNet master functionality, the 1747-SDN remains the optimal choice. For greenfield or migration projects, evaluate the 1756-DNB on a ControlLogix platform.
Quality Assurance & Sourcing
- Authenticity: All 1747-SDN units sourced by Konmask are verified against Rockwell Automation serial number databases where applicable.
- Inspection: Each module undergoes visual inspection, label verification, and functional power-on testing prior to shipment.
- Condition Options: New (factory-sealed), Refurbished (tested & certified), and Surplus (tested, cosmetic wear acceptable) — specify at time of inquiry.
- Traceability: Full supply chain documentation available on request for regulated industries.
- Warranty: 12-month warranty on all units; extended warranty available upon request.
How to Order
- Confirm Part Number: Verify the exact catalog number (1747-SDN or 1747-SDN/B) from your existing system or BOM.
- Specify Quantity & Condition: Indicate required quantity and preferred condition (new / refurbished / surplus).
- Request a Quote: Contact us via email at [email protected] or call +0086 19859288691.
- Review & Confirm: We will provide a formal quotation with lead time, shipping options, and payment terms within 24 business hours.
- Place Order & Ship: Orders are processed same-day when placed before 3:00 PM CST. Express and international shipping available.
Replacement & Compatibility FAQ
Q: Is the 1747-SDN/B a direct replacement for the 1747-SDN?
A: Yes. The /B revision is a firmware-updated version of the same hardware. It is a direct drop-in replacement with no wiring or configuration changes required in most applications.
Q: Can I use the 1756-DNB as a replacement in my SLC 500 system?
A: No — the 1756-DNB is designed for the ControlLogix 1756 chassis and is not physically or electrically compatible with the SLC 500 1746 chassis. It represents an upgrade/migration path, not a direct replacement.
Q: What software do I need to configure the 1747-SDN?
A: RSNetWorx for DeviceNet is required for network configuration and EDS file management. RSLogix 500 is used for ladder logic programming and I/O mapping.
Q: How many DeviceNet devices can the 1747-SDN support?
A: The 1747-SDN supports up to 63 slave nodes (MAC IDs 0–63, with one reserved for the scanner itself).
Q: Is the 1747-SDN still in production?
A: The 1747-SDN has been discontinued by Rockwell Automation. Konmask maintains surplus and refurbished stock to support ongoing maintenance and retrofit requirements.
Q: What is the lead time for the 1747-SDN?
A: In-stock units typically ship within 1–3 business days. For large quantities or specific revision requirements, contact us for availability confirmation.
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Contact: [email protected] | +0086 19859288691
