Allen-Bradley 1769-SM2 Compact I/O DSI / MODBUS Module

The Allen-Bradley 1769-SM2 is a versatile Compact I/O module designed to facilitate communication between CompactLogix or MicroLogix 1500 controllers and PowerFlex 4 and PowerFlex 7 class drives. This module supports both Drive Serial Interface (DSI) and MODBUS RTU communication protocols, providing robust connectivity options for industrial automation systems.

Key Features

The 1769-SM2 module serves as an effective communication interface for PowerFlex drives via the 20-COMM-H RS485 adapter. It supports both single-drive and multi-drive modes, making it suitable for a variety of industrial applications.

This module operates with a single-slot width design, allowing it to be easily integrated into existing systems without occupying excessive space. Its flexible mounting options include DIN Rail and panel mounting, ensuring simple installation in diverse environments.

Supported Protocols and Speed

Drive Serial Interface (DSI): Transmission speed of 19200 bps.
MODBUS RTU: Supports multiple transmission speeds, including 300, 600, 1200, 2400, 4800, 9600, 19200, and 38400 bps.

Power Requirements

The 1769-SM2 module draws 350 mA at 5V DC and 0 mA at 24V DC, drawing power from the Compact I/O Power Supply. It is compatible with MicroLogix 1500 and CompactLogix controllers, as well as remote 1769-based adapters like the 1769-ADN.

Environmental Specifications

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)
Operating Shock: 30g (11 ms)

Technical Specifications

Parameter	Specification
Manufacturer	Allen-Bradley
Model Number	1769-SM2
Product Line	CompactLogix
Module Type	DSI/Modbus Communication Module
Protocol Support	DSI, MODBUS RTU
Data Transfer Speed (DSI)	19200 bps
Data Transfer Speed (MODBUS)	300 to 38400 bps
Current Draw (5V DC)	350 mA
Current Draw (24V DC)	0 mA
Module Width	Single Slot
Compatible Controllers	CompactLogix, MicroLogix 1500
Mounting Type	DIN Rail, Panel Mounting
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, 11 ms
Wire Size	22-14 AWG (Solid), 22-16 AWG (Stranded)

Compatibility and Installation

The 1769-SM2 module is compatible with both MicroLogix 1500 and CompactLogix controllers. It also integrates seamlessly with remote 1769-based adapters. When used in multi-drive mode, it requires ControlFLASH via the CompactLogix controller backplane.

The module is DIN rail or panel mountable, providing flexibility during installation. It is designed for compact systems and can communicate effectively across a variety of industrial settings.