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Allen-Bradley 1771-CAN/B is a CNET-compatible remote I/O adapter designed for industrial network communication in PLC systems. This module enables DeviceNet connectivity for legacy 1771 I/O racks, allowing integration with modern control architectures. Featuring CAN-based networking, automatic baud rate detection, and plug-and-play installation, it provides reliable data exchange between PLC-5/1771 systems and DeviceNet-compatible devices in factory automation applications.
Product Specifications
Core Specifications
Network Protocol: DeviceNet (CAN 2.0B)
Baud Rates: 125/250/500 kbps (auto-detect)
I/O Compatibility: 1771-A1B, -A2B, -A3B, -A4B chassis
Node Address: DIP-switch configurable (0-63)
Power Requirements: 24V DC (100mA) via DeviceNet connector
Isolation: 500V optical isolation (network to backplane)
Key Functional Attributes
Communication Features
Supports polled, COS, and cyclic I/O messaging
64-byte input/64-byte output data mapping
EDS file available for RSNetWorx configuration
Diagnostics & Indicators
4-LED status display (Power, Network, Module OK, I/O Active)
Bus-off recovery with automatic retry
Configurable heartbeat for connection monitoring
Mechanical Specifications
Performance Characteristics
Scan Time: <5ms at 500kbps (for 32 I/O words)
Node Capacity: Up to 64 nodes per network
Cable Length: 100m (500kbps) to 500m (125kbps)
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