Allen-Bradley 1772-SD2 PLC-2 Remote I/O Scanner and Distribution Panel

Allen-Bradley 1772-SD2 PLC-2 Remote I/O Scanner for Distributed Control Systems

The Allen-Bradley 1772-SD2 Remote I/O Scanner and Distribution Panel is designed for PLC-2, PLC-2/20, and PLC-2/30 processors, providing a centralized interface between the processor and remote I/O chassis. It enables reliable data exchange across distributed I/O architectures using serial twinaxial communication.

Confirmed Remote I/O Communication Capabilities

• Supports up to 1,792 discrete I/O points across remote racks
• Serial twinaxial communication link for remote I/O data transfer
• Handles both input data acquisition and output data distribution
• Eight bi-color LED indicators for I/O and communication status

PLC-2 System Architecture Integration

The 1772-SD2 mounts adjacent to the PLC-2 processor and draws power from the system backplane. It acts as the primary scanning interface, managing data flow between the processor and up to 16 remote adapter modules per channel over extended cable distances.

Supported Automation Applications

• Distributed I/O systems using PLC-2 family processors
• Industrial control panels requiring remote rack communication
• Legacy Allen-Bradley PLC-2 automation environments