Overview
The Allen-Bradley 1747-SN /B Remote I/O Scanner is a critical communication module for SLC 500 control systems. It facilitates master-slave data exchange between an SLC processor and remotely located 1746 I/O chassis, PanelView displays, and other RIO-compatible Allen-Bradley automation devices.
Key Features
- Single RIO port with dedicated three-pin connector for remote I/O communication
- Extended communication range up to 3,048 meters (10,000 feet) via twisted-pair cabling
- Dual baud rate support: 57.6 Kbaud and 230.4 Kbaud for flexible network configuration
- Block transfer capability: Series B and later can transfer up to 64 words of data to remote devices
- DIP switch configuration for flexible master-slave network setup
- UL/CSA listed and CE marked for compliance in industrial environments
Technical Specifications
- Series: Series B (FRN 1.0b)
- Input Power: 5 VDC backplane supply
- Backplane Current: 600 mA at 5 VDC
- Communication Interface: Single RIO port (3-pin connector)
- Baud Rates: 57.6 Kbaud, 230.4 Kbaud (DIP-selectable)
- Maximum Cable Length: 3,048 m (10,000 ft) over Belden 9463 twisted-pair cable
- Operating Temperature: 0–60 °C
- I/O Data Transfer: Maximum 4 logical racks (32 input + 32 output words)
- Certifications: UL/CSA Class I Division 2 Groups A–D, CE marked
Typical Applications
- Distributed manufacturing systems with decentralized I/O racks
- Remote equipment monitoring and control (assembly lines, packaging, material handling)
- Integration of legacy SLC 5/02–5/05 systems with PanelView and operator interfaces
- Multi-location production floors requiring long-distance communication
- Retrofit applications expanding I/O beyond local chassis capacity
Compatibility & Replacements
Compatible With
- SLC 5/02, 5/03, 5/04, 5/05 processors
- 1746 I/O chassis and distributed adapters
- PanelView operator interfaces (RIO-enabled)
- Standard RIO adapter devices
- SLC 500 local I/O backplane (standard 1746 format)
Replaces / Drop-In Replacement For
- Allen-Bradley 1747-SN Series A and earlier revisions
- 1747-SN /A (Series A)
- Verify compatibility with your system integrator for legacy SLC configurations
Works With
- Allen-Bradley RSLogix 500 programming software
- Remote I/O (RIO) communication protocol
- Twisted-pair cabling: Belden 9463 or equivalent
- SLC 500 I/O configuration tools and runtime diagnostics
