Distributed I/O Control Solution – Allen-Bradley 1747-SN | SLC 500 Series
Where This Product Is Used
The Allen-Bradley 1747-SN SLC Remote I/O Scanner Module is deployed wherever a SLC 500 controller must communicate with remote I/O racks located away from the main chassis. Typical installation environments include:
- Automotive Assembly Lines — Coordinating distributed weld, paint, and conveyor stations across large floor footprints where remote racks reduce wiring runs by hundreds of meters.
- Food & Beverage Processing Plants — Managing filling, capping, and labeling stations spread across hygienic zones, each requiring isolated I/O drops on a single Remote I/O link.
- Water & Wastewater Treatment Facilities — Polling pump stations, valve actuators, and level sensors distributed across large outdoor sites from a central SLC 500 host controller.
- Material Handling & Warehousing — Controlling sorters, diverters, and conveyor zones where I/O nodes are positioned at each transfer point along the line.
- Oil & Gas Upstream/Midstream — Interfacing with remote field I/O panels in hazardous-area enclosures via the 1771 Remote I/O link at distances up to 3,048 m (10,000 ft).
- Pharmaceutical Manufacturing — Supporting validated SLC 500 systems where remote I/O architecture preserves existing validated code while extending physical reach.
- Pulp & Paper Mills — Integrating distributed drive I/O, motor starters, and process instruments across multi-building plant layouts.
Technical Specifications
| Parameter | Value |
|---|---|
| Catalog Number | 1747-SN |
| Series / Revision | SLC 500 |
| Module Type | Remote I/O Scanner |
| Communication Protocol | Allen-Bradley Remote I/O (1771 RIO) |
| Max Remote I/O Link Distance | 3,048 m (10,000 ft) at 57.6 Kbps |
| Baud Rates Supported | 57.6 Kbps / 115.2 Kbps / 230.4 Kbps |
| Max I/O Racks Supported | Up to 32 logical rack addresses |
| 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 | 350 g (approx.) |
| Slot Occupancy | Single slot, SLC 500 chassis |
| Keying | Electronic keying supported |
Why Engineers Specify This Model
- Proven 1771 RIO Architecture — The 1747-SN uses the same battle-tested Remote I/O protocol as the PLC-5 family, enabling seamless integration with existing 1771 I/O racks already installed in the field — protecting prior capital investment.
- Long-Distance Reach — At 57.6 Kbps, the RIO link extends up to 3,048 m, eliminating the need for additional communication bridges in large-footprint facilities.
- High I/O Density — Supports up to 32 logical rack addresses, allowing engineers to map large quantities of discrete and analog I/O without additional scanner hardware.
- Deterministic Scan Performance — The scanner updates remote I/O synchronously with the SLC 500 program scan, ensuring predictable, real-time I/O response critical for motion and safety-adjacent applications.
- Single-Slot Form Factor — Occupies only one SLC 500 chassis slot, preserving valuable rack space for additional I/O or specialty modules.
- Backward Compatibility — Fully compatible with RSLogix 500 programming software and existing SLC 5/03, 5/04, and 5/05 processors, minimizing re-engineering effort during system expansions.
Complete System Bill of Materials
A typical SLC 500 distributed I/O system using the 1747-SN includes the following components:
| Catalog Number | Description | Role in System |
|---|---|---|
| 1747-SN | SLC Remote I/O Scanner Module | Host scanner — this product |
| 1747-L553 / L554 / L555 | SLC 5/05 / 5/04 / 5/03 Processor | Host CPU in main chassis |
| 1746-A4 / A7 / A10 / A13 | SLC 500 Chassis (4/7/10/13 slot) | Main chassis housing processor and scanner |
| 1771-ASB | Remote I/O Adapter Module | Installed in each remote 1771 rack |
| 1771-A1B / A2B / A3B1 | 1771 I/O Chassis | Remote rack housing field I/O modules |
| 1771-IB / OB / OBD | Discrete Input / Output Modules | Field-level digital I/O at remote racks |
| 1771-IF / OF | Analog Input / Output Modules | Process signal I/O at remote racks |
| 1747-CP3 | Programming Cable (RS-232) | Laptop-to-processor connection for RSLogix 500 |
| 1747-UIC | USB-to-DH485 Interface Converter | Modern USB programming interface |
Compliance & Industry Standards
- UL Listed — Recognized under UL 508 (Industrial Control Equipment)
- CE Marked — Compliant with EU Low Voltage Directive and EMC Directive
- RoHS Compliant — Meets EU Directive 2011/65/EU on restriction of hazardous substances
- ATEX / Class I Div 2 — Suitable for use in non-incendive Class I, Division 2 hazardous locations when installed per Rockwell Automation installation instructions
- IEC 61131-2 — Programmable controller hardware standard compliance
- ODVA / ControlNet — Interoperability tested within Allen-Bradley ecosystem
Quality Assurance & Sourcing
At Konmask.com, every 1747-SN unit undergoes a structured verification process before dispatch:
- Visual Inspection — Enclosure, connector pins, label integrity, and firmware revision label checked against OEM specifications.
- Functional Power-On Test — Module is bench-powered and LED status indicators verified for normal operation prior to shipment.
- Authenticity Screening — Units sourced exclusively from authorized distributors, certified resellers, or verified surplus channels with traceable provenance documentation.
- Anti-Counterfeit Checks — PCB markings, component dates, and housing tolerances cross-referenced against known-good reference units.
- Packaging — Shipped in anti-static ESD bags with foam cushioning inside double-wall corrugated cartons. Fragile and orientation labels applied.
- Warranty — 90-day functional warranty against defects in materials and workmanship. Extended warranty available on request.
How to Source This Part
- Confirm your firmware revision requirement — Check your existing SLC 500 processor firmware version in RSLogix 500 to ensure compatibility with the 1747-SN revision available.
- Verify chassis slot availability — The 1747-SN occupies one slot; confirm an open slot exists in your SLC 500 chassis before ordering.
- Add to cart and complete checkout — Secure online checkout with bank transfer, PayPal, and major credit cards accepted.
- Receive shipping confirmation — Orders confirmed before 3:00 PM CST on business days typically ship same day. Tracking number provided via email.
- Need a formal quotation? — Email support@konmask.com with your PO number, required quantity, and delivery deadline. Net-30 terms available for qualified accounts.
Application-Specific FAQ
Q: Can the 1747-SN communicate with 1771 I/O racks originally designed for a PLC-5 system?
A: Yes. The 1747-SN uses the same 1771 Remote I/O protocol as the PLC-5 family. Existing 1771-ASB adapter modules and 1771 I/O racks can be reused without modification, making it an ideal migration path from PLC-5 to SLC 500 architectures.
Q: What is the maximum cable length for the Remote I/O link?
A: At 57.6 Kbps, the maximum trunk cable length is 3,048 m (10,000 ft). At 115.2 Kbps the limit is 1,524 m, and at 230.4 Kbps it is 762 m. Use Belden 9463 or equivalent shielded twisted-pair cable.
Q: How many 1747-SN modules can be installed in a single SLC 500 chassis?
A: Multiple 1747-SN modules can be installed in the same chassis, each managing an independent Remote I/O link. This allows a single SLC 500 system to control multiple geographically separated I/O networks simultaneously.
Q: Is the 1747-SN compatible with RSLogix 500 on modern Windows 10/11 systems?
A: Yes. RSLogix 500 (v8.x and later) runs on Windows 10 and Windows 11. Use the 1747-UIC USB-to-DH485 converter or an Ethernet-connected 1761-NET-ENI for programming access.
Q: Can this module be used in a safety-rated SIL application?
A: The 1747-SN is not a SIL-rated safety module. For safety-rated distributed I/O, Rockwell Automation recommends the GuardLogix / POINT Guard I/O platform. The 1747-SN may be used in non-safety zones of a hybrid safety/standard architecture.
Q: Do you offer volume pricing for MRO or OEM procurement?
A: Yes. Contact support@konmask.com with your annual volume forecast and we will provide a tiered pricing schedule and dedicated account support.
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