Allen-Bradley 1769-SM2 Communication Module

Allen-Bradley 1769-SM2 DSI/Modbus Communication Module Product Introduction

The 1769-SM2 from Allen-Bradley is a specialized communication module. It bridges CompactLogix and MicroLogix 1500 controllers with PowerFlex drives. This 1769-SM2 module supports both Drive Serial Interface (DSI) and Modbus RTU protocols. It connects to PowerFlex 4-class drives directly. For PowerFlex 7-class drives, it uses the 20-COMM-H RS485 adapter. Its compact single-slot design fits into the 1769 I/O chassis. This provides a cost-effective solution for drive networking.

Technical Specifications

The 1769-SM2 features dual-protocol support for flexibility. For DSI operation, it achieves 19,200 bps. For Modbus RTU, it supports multiple rates. These include 300, 600, 1200, 2400, and 4800 bps. Higher rates include 9600, 19200, and 38400 bps. The module draws 350 mA from the 5V DC backplane. It draws 0 mA from the 24V DC supply. This minimizes power consumption. Specifically, the 1769-SM2 offers three communication channels. Each channel supports up to five PowerFlex 4-class drives. Therefore, one module supports 15 drives total. Additionally, this module supports single-drive and multi-drive modes. For multi-drive mode, use ControlFLASH for updates. These updates occur through the CompactLogix backplane.

Mechanical and Enviro#nmental Parameters

The 1769-SM2 has compact dimensions. It measures 4.65 x 1.38 x 3.43 inches. This is approximately 118 x 35 x 87 mm. It weighs about 5 ounces (0.14 kg). The shipping weight is 2 lbs. Shipping dimensions are 8 x 8 x 5 inches. Its open-style enclosure needs a protected cabinet. For wiring, it accepts copper-90°C wire. Solid wire sizes range from 22 to 14 AWG. Stranded wire sizes range from 22 to 16 AWG. Furthermore, the operating temperature range is -10 to 50°C. This equals 14 to 122°F. Storage temperature ranges from -40 to 85°C (-40 to 185°F). The 1769-SM2 withstands 5G vibrations at 10 to 500 Hz. It also handles operating shocks of 30G for 11ms. This ensures reliable performance in demanding environments.

Installation and Mounting Guide

Mounting the Allen-Bradley 1769-SM2 is straightforward. It supports both DIN rail and panel mounting. First, install the module in any available slot. Use the tongue-and-groove locking system. Next, secure the bus lever to lock the bus. Importantly, this 1769-SM2 has a Power Supply Distance Rating of 4. Place it within four slots of the power supply. Additionally, observe cable distance limits. The maximum distance to PowerFlex 4 drives is 10 meters (32.8 feet). For twisted-pair network wiring, the maximum is 1,219 meters (4,000 feet). For remote applications, the 1769-SM2 works with adapters. Compatible adapters include the 1769-ADN and 1769-AENTR.

Packaging List

Every shipment of the 1769-SM2 includes:

• One 1769-SM2 DSI/Modbus communication module

• One removable terminal block with finger-safe cover

• One write-on identification label

Frequently Asked Questions (FAQ)

Q1: Which controllers are compatible with the 1769-SM2?
This module works with CompactLogix controllers. It also works with MicroLogix 1500 systems. Additionally, it supports remote 1769-based adapters like the 1769-ADN.

Q2: What drives can I connect to the 1769-SM2?
The 1769-SM2 connects to PowerFlex 4-class drives directly. For PowerFlex 7-class drives, use the 20-COMM-H RS485 adapter.

Q3: How many drives does one 1769-SM2 support?
This module supports up to five drives per channel. It has three channels total. Therefore, one 1769-SM2 supports 15 PowerFlex 4-class drives.

Q4: What is the Power Supply Distance Rating?
The rating is 4 modules. Place the 1769-SM2 within four slots of the power supply. Exceeding this distance may cause issues.

Q5: What shipping methods are available?
We ship this module using trusted global carriers. These include FedEx, UPS, and DHL. This ensures fast and secure delivery.