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- Allen Bradley
- 1747-SCNR/A
- ControlNet Adapter Module
- USA
- 12.7 × 5.1 × 15.2 cm
- 0.45kg
- Xiamen, China
- New & In Stock
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Allen Bradley 1747-SCNR/A Detailed Product Introduction and Technical Specifications
Product Overview
The Allen Bradley 1747-SCNR/A is a ControlNet Scanner Module designed for the SLC 500 programmable logic controller platform. It is used to connect SLC processors to a ControlNet industrial network, enabling high-speed deterministic communication with remote I/O devices, drives, and other controllers.
This module plays a critical role in distributed control systems, especially in manufacturing and process automation environments where reliable real-time communication is required.
It supports both redundant and non-redundant ControlNet media, making it suitable for high-availability industrial network architectures.
Brand Information
| Item | Details |
|---|---|
| Brand | Allen Bradley |
| Product Model | 1747-SCNR/A |
| Product Type | ControlNet Scanner Communication Module |
| Product Family | SLC 500 Series |
| Series | SLC Communication Modules |
| Main Function | ControlNet Network Scanner |
| Communication Protocol | ControlNet |
| Installation Type | PLC Rack Module |
Product Series Introduction
SLC 500 ControlNet Architecture
The SLC 500 system is a modular PLC platform widely used in industrial automation.
Communication modules such as the 1747-SCNR/A extend the system’s capability by enabling high-speed network connectivity.
The ControlNet protocol is designed for deterministic real-time control, making it suitable for synchronized I/O, motion control, and distributed automation systems.
The 1747-SCNR/A acts as a scanner, managing data exchange between the SLC CPU and ControlNet-connected devices.
Detailed Technical Specifications of 1747-SCNR/A
| Parameter | Specification |
|---|---|
| Model | 1747-SCNR/A |
| Product Type | ControlNet Scanner Module |
| Communication Network | ControlNet |
| Number of Ports | 2 (Channel A & B) |
| Supported Media | Redundant and non-redundant ControlNet |
| Compatible Processors | SLC 5/02, 5/03, 5/04, 5/05 |
| Function | I/O scanning and network communication |
| Maximum Connections | Multiple scheduled & unscheduled connections |
| Backplane Current (5V DC) | 800 mA |
| Backplane Current (24V DC) | 90 mA |
| Isolation | Optical isolation between backplane and network |
| Network Cable Type | RG-6 coaxial (1786 series) |
| Network Topology | Linear / redundant ControlNet |
| LED Indicators | CHA, CHB, OK status indicators |
| Slot Placement | Any slot except left-most CPU slot |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Humidity Range | 5%–95% non-condensing |
| Shock Resistance | Up to 30G operating |
| Vibration Resistance | Industrial standard |
| Dimensions | ~12.7 × 5.1 × 15.2 cm |
| Weight (kg) | ~0.40–0.45 kg |
Product Features
1. ControlNet High-Speed Communication
The 1747-SCNR/A enables deterministic high-speed data transfer over ControlNet networks.
It ensures precise timing for industrial automation applications such as synchronized production lines and motion systems.
2. Dual Channel Redundancy Support
The module includes two communication channels (A and B), supporting redundant network configurations.
This improves system reliability in critical industrial environments.
3. Multi-Processor Compatibility
It supports multiple SLC processors including SLC 5/02 through SLC 5/05, allowing flexible system integration.
4. Real-Time I/O Scanning
The module performs continuous scanning of distributed I/O devices, ensuring real-time process control.
5. Industrial Rugged Design
Designed for harsh environments with strong resistance to vibration, electrical noise, and temperature variation.
Product Applications
Distributed Control Systems
Used in large-scale industrial automation systems requiring synchronized control across multiple nodes.
Manufacturing Automation
Common in assembly lines, packaging systems, and production automation environments.
Process Control Systems
Used in chemical plants, oil and gas facilities, and continuous process industries.
Motion Control Networks
Supports synchronized communication for drives and motion control applications.
Legacy SLC 500 Installations
Widely used in older industrial systems that still rely on ControlNet architecture.
Product Advantages
| Advantage | Description |
|---|---|
| Deterministic Communication | Real-time industrial data transfer |
| Dual Channel Support | Redundant network capability |
| High Compatibility | Works with multiple SLC CPUs |
| Reliable I/O Scanning | Stable distributed control |
| Industrial Ruggedness | Suitable for harsh environments |
| Flexible Slot Placement | Easy integration into racks |
| LED Diagnostics | Clear system status monitoring |
| Long Service Life | Designed for industrial durability |
Recommended Models from Same Series or Related Series
| Model | Product Type | Main Function | Application | Dimensions | Weight (kg) |
|---|---|---|---|---|---|
| 1747-SN | Remote I/O Scanner | Legacy I/O communication | Distributed systems | ~12 × 5 × 15 cm | ~0.45 kg |
| 1747-ASB | Adapter Module | Remote I/O adapter | Rack expansion systems | ~12 × 5 × 14 cm | ~0.40 kg |
| 1747-BSN | Backup Scanner | Redundant control switching | High availability systems | ~12 × 6 × 15 cm | ~0.50 kg |
| 1747-SDN | DeviceNet Scanner | DeviceNet communication | Field device control | ~12 × 5 × 15 cm | ~0.45 kg |
| 1747-SCNR/A | ControlNet Scanner | ControlNet I/O scanning | Real-time control systems | ~12.7 × 5.1 × 15.2 cm | ~0.42 kg |
Recommended Popular Models from Same Brand
| Model | Product Category | Main Features | Application Area | Dimensions | Weight (kg) |
|---|---|---|---|---|---|
| 1747-L541 | CPU Module | SLC 5/04 processor | Industrial automation | 25 × 17 × 6 cm | 0.45 kg |
| 1747-L542 | CPU Module | High-performance CPU | Distributed control systems | 25 × 16.6 × 5.9 cm | 0.40 kg |
| 1747-L551 | CPU Module | Ethernet-enabled CPU | Network automation | 25 × 16.5 × 5.6 cm | 0.42 kg |
| 1756-EN2TR | Ethernet Module | Dual Ethernet/IP ports | Industrial networking | 14 × 11 × 8 cm | 0.45 kg |
| 1769-L33ER | Compact PLC | Built-in Ethernet/IP | Machine automation | 18 × 12 × 9 cm | 0.92 kg |
System Role in Industrial Automation
The 1747-SCNR/A acts as a ControlNet network scanner within the SLC 500 architecture.
It manages real-time communication between the PLC processor and distributed control devices.
It is essential in systems requiring synchronized, deterministic industrial communication.
Installation and Maintenance Characteristics
The module is installed into the SLC 500 rack system, excluding the left-most CPU slot.
Configuration is done through system software and network setup tools.
Maintenance is minimal, typically involving module replacement or network troubleshooting.
LED indicators simplify diagnostics and system monitoring.
Industrial Reliability
The 1747-SCNR/A is widely used in demanding industrial environments due to its robust communication architecture and stable performance.
It remains an important component in legacy ControlNet-based automation systems.
Its redundancy support and deterministic communication make it suitable for critical industrial processes.
Summary
The Allen Bradley 1747-SCNR/A is a ControlNet scanner module designed for SLC 500 PLC systems.
It provides real-time, deterministic network communication for distributed industrial control applications.
Its dual-channel redundancy, compatibility, and rugged design make it a key component in high-reliability automation systems.