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- Allen Bradley
- 1747-SN/B
- SLC500 Remote I/O Scanner Module
- USA
- 152 x 51 x 152 mm
- 0.27 kg
- Xiamen, China
- New & In Stock
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Product Overview
In modern industrial automation systems, flexible I/O expansion, reliable remote communication, and efficient control architecture are essential for improving production efficiency and reducing system complexity. The Allen Bradley 1747-SN/B SLC500 Remote I/O Scanner Module is a communication interface module designed for the Allen Bradley SLC 500 platform, providing remote I/O connectivity between SLC processors and distributed input/output devices.
The 1747-SN/B allows an SLC 500 processor to communicate with remote I/O racks located away from the main control cabinet. By using remote I/O communication technology, this module enables centralized PLC control while allowing field devices to be installed closer to machines and production equipment.
This module plays an important role in large industrial automation systems where long-distance signal transmission, distributed control, and flexible system expansion are required.
The Allen Bradley 1747-SN/B is commonly used in manufacturing equipment, material handling systems, production lines, and industrial automation applications that require reliable remote I/O management.
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | Allen Bradley |
| Model | 1747-SN/B |
| Product Type | SLC500 Remote I/O Scanner Module |
| PLC Platform | SLC 500 |
| Module Type | Communication Scanner Module |
| Function | Remote I/O communication and control |
| Communication Method | Remote I/O Network |
| Installation Type | SLC 500 Chassis Mounting |
| Dimensions | 152 × 51 × 152 mm |
| Weight | 0.27 kg |
| Application | Industrial automation and distributed control |
| System Role | Remote I/O interface expansion |
| Communication Purpose | Data exchange between PLC and remote racks |
| Operating Environment | Industrial control environment |
Function and Working Principle
The Allen Bradley 1747-SN/B Remote I/O Scanner Module works as a communication bridge between the SLC 500 processor and remote I/O devices.
The module scans remote I/O racks, collects input data from field devices, and transfers output commands from the PLC processor to connected equipment.
The working process can be described as:
Field Devices → Remote I/O Rack → 1747-SN/B Scanner Module → SLC Processor → Control Outputs
The main functions include:
- Managing communication with remote I/O racks
- Collecting distributed input signals
- Sending output commands to remote devices
- Expanding PLC system I/O capacity
- Reducing long-distance field wiring requirements
During operation, the scanner module continuously exchanges data between the main PLC controller and remote I/O stations, ensuring coordinated control of distributed equipment.
Role in Industrial Control Systems
The Allen Bradley 1747-SN/B plays an important role in expanding SLC 500 control system architecture.
In large production environments, installing all I/O modules inside the main PLC cabinet can increase wiring complexity and installation costs. The remote I/O scanner module allows I/O devices to be distributed closer to field equipment while maintaining centralized PLC control.
The module typically works together with:
- SLC 500 processors
- Remote I/O adapter modules
- Digital input modules
- Digital output modules
- Analog I/O modules
- Industrial sensors and actuators
A typical system structure includes:
SLC Processor → 1747-SN/B Scanner → Remote I/O Rack → Field Equipment
This configuration provides:
- Reduced field wiring distance
- Flexible I/O expansion
- Improved system organization
- Centralized automation control
- Easier maintenance and troubleshooting
Industrial Applications
The Allen Bradley 1747-SN/B SLC500 Remote I/O Scanner Module is widely used in industrial automation applications.
Manufacturing Production Lines
Used for:
- Distributed machine control
- Assembly line automation
- Equipment monitoring
- Production process management
Material Handling Systems
Applied in:
- Conveyor systems
- Warehouse automation
- Transfer equipment
- Sorting systems
Automotive Manufacturing
Supports:
- Automated assembly stations
- Robot peripheral equipment
- Production line communication
Process Automation
Used for:
- Pump control systems
- Valve monitoring
- Distributed field control
- Industrial process equipment
Factory Automation Upgrades
Applied in:
- Existing SLC 500 system expansion
- Legacy PLC improvement projects
- Remote control cabinet installations
Installation and System Integration
Proper installation of the Allen Bradley 1747-SN/B Scanner Module is essential for maintaining reliable remote I/O communication.
Recommended installation procedures include:
- Installing the module into the correct SLC 500 chassis slot
- Confirming processor compatibility
- Connecting remote I/O communication cables correctly
- Configuring remote rack addresses
- Verifying I/O module settings
During commissioning, engineers should check:
- Scanner module status indicators
- Remote rack communication
- Input signal updates
- Output response
- Network configuration
Correct installation helps prevent:
- Remote I/O communication failures
- Incorrect field signal processing
- Control system interruptions
- Production downtime
Compatible System Components
The Allen Bradley 1747-SN/B typically works together with the following components:
| Component | Function |
|---|---|
| SLC 500 Processor | Executes PLC control programs |
| Remote I/O Adapter Modules | Connect remote I/O racks |
| Digital Input Modules | Collect field switching signals |
| Digital Output Modules | Control external devices |
| Analog I/O Modules | Process measurement signals |
| Industrial Sensors | Provide field information |
| Actuators and Equipment | Execute PLC commands |
Together, these components create a distributed industrial control system.
Common Failure Symptoms
When the Allen Bradley 1747-SN/B Remote I/O Scanner Module experiences problems, the system may show the following symptoms:
| Fault Symptom | Possible Cause |
|---|---|
| Remote I/O communication loss | Network connection problem |
| Scanner fault indicator active | Module configuration issue |
| Input data not updating | Remote rack communication failure |
| Output devices not responding | I/O communication interruption |
| PLC system alarms | Scanner or remote adapter fault |
Regular inspection of communication wiring, module status, and remote I/O configuration helps maintain stable operation.
Recommended Alternative Models
Depending on system requirements and automation architecture, the following related models may be considered:
| Model | Type | Key Feature | Application |
|---|---|---|---|
| Allen Bradley 1747-SN/B | Remote I/O Scanner Module | SLC 500 remote I/O communication | Distributed control systems |
| Allen Bradley 1747-SCNR | ControlNet Scanner Module | ControlNet network communication | Advanced automation networks |
| Allen Bradley 1747-ASB | Remote I/O Adapter Module | Remote rack communication | Distributed I/O applications |
| Allen Bradley Remote I/O Modules | Communication Components | Flexible field expansion | Industrial automation systems |
| Allen Bradley SLC Communication Modules | Network Interface Modules | PLC connectivity solutions | System integration projects |
Key Advantages
- Expands SLC 500 I/O system capability
- Supports distributed automation architecture
- Reduces complex field wiring requirements
- Provides reliable remote communication
- Improves system flexibility and scalability
- Suitable for large industrial equipment
- Designed for continuous industrial operation
Technical FAQs
What is the Allen Bradley 1747-SN/B used for?
The Allen Bradley 1747-SN/B is a remote I/O scanner module used to connect SLC 500 processors with distributed remote I/O racks.
Why use a remote I/O scanner module?
A remote I/O scanner allows field devices to be installed closer to machines while keeping centralized PLC control.
Which components work with the 1747-SN/B?
It works with SLC 500 processors, remote I/O adapters, digital and analog I/O modules, sensors, and actuators.
What causes remote I/O communication failures?
Common causes include cable problems, incorrect configuration, addressing errors, module faults, and communication interruptions.
Conclusion
The Allen Bradley 1747-SN/B SLC500 Remote I/O Scanner Module is an important communication component designed to expand the flexibility and scalability of SLC 500 industrial control systems.
By enabling reliable communication between PLC processors and distributed I/O racks, it helps simplify system wiring, improve automation architecture, and maintain stable production operations.
For automation engineers, system integrators, and maintenance teams, selecting the correct remote I/O communication module is essential for improving control system reliability, reducing installation complexity, and ensuring long-term industrial performance.