The Allen-Bradley 1769-SM2 is a Compact I/O communication module that allows CompactLogix and MicroLogix 1500 controllers to communicate with PowerFlex drives using Drive Serial Interface (DSI) or Modbus RTU protocols.

Product Overview

• Type: Compact I/O communication module
• Manufacturer: Rockwell Automation (Allen-Bradley)
• Lifecycle Status: Active, mature product
• Primary Function: Provides serial communication between controllers and drives.
• Supported Controllers: CompactLogix, MicroLogix 1500

Key Specifications

• Communication Protocols:
  • DSI (Drive Serial Interface): 19,200 bps
  • Modbus RTU: 300–38,400 bps
• Hardware Interfaces:
  • RS-232: 3 ports
  • RS-422: 3 ports
  • RS-485: 3 ports
• Unsupported Protocols: TCP/IP, PROFIBUS, CAN
• Supported Drives:
  • PowerFlex 4-class drives
  • PowerFlex 7-class drives (via 20-COMM-H RS485 adapter)
• Dimensions: 3.8 × 12.7 × 8.9 cm
• Weight: ~0.2 kg