The Allen-Bradley 1794-ACN15 is a ControlNet communication adapter module designed for the FLEX I/O system. It acts as the critical interface, allowing a bank of FLEX I/O modules to connect to and communicate on a high-speed ControlNet network.
This adapter is a key component in distributed control architectures, enabling real-time control and I/O data exchange between a programmable controller (PLC) and remote I/O racks across a robust and deterministic network.
Key Features & Benefits
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ControlNet Network Connectivity:Â Provides a direct connection to the Allen-Bradley ControlNet network, a high-integrity, high-speed network for industrial automation.
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Deterministic Performance:Â ControlNet is known for its deterministic data transfer, meaning data delivery is guaranteed within a set time frame, which is crucial for time-sensitive control applications.
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Module Capacity: The 1794-ACN15 adapter can control up to 8 FLEX I/O modules in any mix of digital, analog, and specialty modules located in a single terminal base unit assembly.
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Dual Network Ports:Â Features two ControlNet ports (redundant coaxial BNC connectors) for easy daisy-chaining of nodes on the network, simplifying cabling and reducing installation costs.
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Real-Time Control & I/O Messaging:Â Supports both scheduled (for real-time control I/O data) and unscheduled (for configuration, diagnostics, and peer-to-peer messaging) communication.
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LED Status Indicators:Â Comprehensive status LEDs for module health, network activity, and I/O module status, allowing for quick diagnostics and troubleshooting.
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Backplane Compatibility:Â Plugs directly into a 1794-TB3, TBS, or TB3S terminal base unit, providing power and data communication to the connected I/O modules.
Technical Specifications
| Feature | Specification |
|---|---|
| Catalog Number | 1794-ACN15 |
| Series | Series C |
| Product Type | ControlNet Adapter |
| Network Protocol | ControlNet |
| Max. Number of I/O Modules | 8 |
| Backplane Current Load | 850 mA @ 5V DC |
| Communication Speed | 5 Mbit/s |
| Node Address Setting | Dual rotary decimal switches (0-99) |
| Network Connectors | Two (2) 75-ohm Coaxial BNC connectors |
| Compatible Chassis | 1794-TB3, TBS, TB3S Terminal Base Units |
| Required Power Supply | 1794-PS1, -PS2, or -PS3 (24V DC) |
Typical Applications
The 1794-ACN15 is ideal for applications requiring distributed, high-speed control with reliable data delivery. Common uses include:
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Automated Assembly Lines
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Material Handling Systems
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Machine Control
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Process Automation
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Any system utilizing a Rockwell Automation/Allen-Bradley ControlNet architecture.
