Allen-Bradley 1769-SM2 DSI / Modbus RTU Communication Module

Allen-Bradley 1769-SM2 DSI / Modbus Communication Module

Core Technical Specifications

• Brand & Manufacturer: Allen-Bradley
• Model: 1769-SM2
• Module Type: DSI / Modbus RTU Communication Interface
• Compatible Controllers: CompactLogix and MicroLogix 1500 Series
• Compatible Drives: PowerFlex 4-Class and PowerFlex 7-Class drives (via 20-COMM-H adapter)
• Supported Protocols: Drive Serial Interface (DSI) and Modbus RTU
• DSI Baud Rate: Fixed at 19,200 bps
• Modbus Baud Rates: Selectable from 300 to 38,400 bps
• Backplane Current Draw: 350 mA @ 5V DC; 0 mA @ 24V DC
• Power Supply Distance Rating: Must be within 4 modules of the I/O power supply

Communication & Operational Details

• Operating Modes: Configurable for single-drive or multi-drive operation.
• Multi-Drive Updates: Requires ControlFLASH via the CompactLogix backplane.
• Maximum Cable Distance (to drive): 10 meters (32.8 feet) for PowerFlex 4-Class drives.
• Maximum Network Distance: Up to 1219 meters (4000 feet) on a twisted-pair network.
• Drive Capacity: One 1769-SM2 can control up to 15 total drives (5 per channel, 3 channels).
• Mounting: Supports DIN rail or panel mounting.
• Module Width: Single slot in a 1769 chassis.

Environmental & Installation Guidelines

• Operating Temperature: -10 to 50°C (14 to 122°F)
• Storage Temperature: -40 to 85°C (-40 to 185°F)
• Vibration Resistance: 5g, 10 to 500 Hz
• Shock Resistance: 30g for 11 ms duration
• Critical Rule: Install within 4 modules of the Compact I/O power supply.
• Do Not Install in areas with volatile, corrosive, or dusty atmospheres.
• Wiring: Use 22 to 14 AWG solid or 22 to 16 AWG stranded copper wire (90°C).
• Receives all power directly from the 1769 system backplane.

Frequently Asked Questions (FAQ)

• Q: What is the main purpose of the 1769-SM2 module?
  A: It allows CompactLogix/MicroLogix controllers to communicate with PowerFlex drives using DSI or Modbus RTU protocols.
• Q: How many drives can one module control?
  A: A single module supports up to 15 PowerFlex 4-Class drives in a multi-drive network.
• Q: What is the maximum communication speed for Modbus?
  A: The 1769-SM2 supports Modbus baud rates up to 38,400 bits per second.
• Q: Are there any special installation rules?
  A: Yes. The module must be placed within 4 slots of the system's power supply for proper operation.
• Q: What is your return policy for this item?
  A: We support a 30-day return period for unused items in original condition.

Contact Information: For technical or sales inquiries about the Allen-Bradley 1769-SM2, please email sales@nex-auto.com or call/message us on +86 153 9242 9628.

Partner: NexAuto Technology Limited