The Allen-Bradley 1769-SM2 is a Compact I/O communication module that enables CompactLogix or MicroLogix 1500 controllers to communicate with drives using Drive Serial Interface (DSI) or Modbus RTU protocol. It supports single and multi-drive modes, typically used with PowerFlex 4-class and 7-class drives.

Overview of 1769-SM2

• Type: Compact I/O communication module
• Manufacturer: Rockwell Automation (Allen-Bradley)
• Purpose: Provides communication between CompactLogix/MicroLogix controllers and drives via DSI or Modbus RTU.
• Applications: Commonly used in small to medium-sized automation systems for drive control and integration.

Key Specifications

• Supported Controllers: CompactLogix, MicroLogix 1500
• Communication Protocols:
  • Drive Serial Interface (DSI)
  • Modbus RTU (RS-232/RS-485)
• Interfaces Available:
  • RS-232: 3 ports
  • RS-422: 3 ports
  • RS-485: 3 ports
• Dimensions: 3.8 × 12.7 × 8.9 cm
• Weight: 0.2 kg
• Operating Modes:
  • Single-drive mode (direct communication with one drive)
  • Multi-drive mode (communication with multiple drives via daisy-chain)
• Supported Drives: PowerFlex 4-class and PowerFlex 7-class drives (via 20-COMM-H RS485 adapter)
• Protocols Not Supported: TCP/IP, PROFIBUS, CAN