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- Allen Bradley
- 1769-SM2
- CompactLogix I/O Module
- USA
- 118 mm × 35 mm × 87 mm
- 0.9kg
- Xiamen, China
- New & In Stock
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Technical Report: Communication Module 1769-SM2
1. Product Overview
The 1769-SM2 is a Compact I/O Drive Communication Module (DSI / Modbus RTU master interface) used in industrial PLC systems to connect CompactLogix or MicroLogix controllers with variable frequency drives and serial drive networks.
It acts as a communication bridge between PLC backplane and drive-level networks, enabling control, monitoring, and parameter exchange with PowerFlex and other compatible drive systems.
This module is mainly used in systems requiring reliable drive integration and multi-drive communication management.
2. Brand Information
- Brand: Industrial Automation Control Brand
- Product Category: PLC Communication / Drive Interface Module
- Technology Field: Industrial Networking / Drive Communication Systems
- Manufacturing Origin: United States (varies by production batch)
3. Product Series
- Series Name: Compact I/O Series
- System Architecture: Modular PLC expansion platform
- Compatible Controllers: CompactLogix / MicroLogix 1500 systems
- Installation Type: DIN rail backplane mounting system
The module is part of a modular PLC ecosystem designed to extend communication capabilities beyond standard I/O.
4. Product Introduction
The 1769-SM2 supports communication with PowerFlex drives and SCANport/DSI-compatible devices.
It operates in two primary modes:
- DSI mode (Drive Serial Interface)
- Modbus RTU Master mode
Key functions include:
- Drive parameter reading and writing
- Speed and status monitoring
- Multi-drive control
- Serial network management
It supports both single-drive and multi-drive configurations.
5. Technical Parameters
5.1 Communication Performance
| Parameter | Value |
|---|---|
| Communication Protocol | DSI / Modbus RTU Master |
| Supported Drives | PowerFlex 4-Class, PowerFlex 7-Class (via adapters) |
| DSI Baud Rate | 19200 bps fixed |
| Modbus Baud Rate | 300 – 38400 bps selectable |
| I/O Image Size | 7 words (single mode) / 31 words (multi-drive mode) |
| Max Cable Length (DSI) | ~10 m |
| Network Type | Serial drive network |
5.2 Electrical Performance
| Parameter | Value |
|---|---|
| Backplane Current Draw | 350 mA @ 5V DC |
| 24V Backplane Load | 0 mA |
| Power Consumption | ~1.75 W |
| Power Source | PLC backplane powered |
| Isolation | Internal industrial isolation |
5.3 System Capability
| Parameter | Value |
|---|---|
| Drive Control Mode | Single / Multi-drive control |
| Supported Devices | Multiple serial-connected drives |
| PLC Compatibility | CompactLogix / MicroLogix 1500 |
| Configuration Tool | PLC programming software environment |
| Module Slot Requirement | Single-slot module |
5.4 Physical Dimensions & Weight
| Parameter | Value |
|---|---|
| Height | 118 mm |
| Width | 35 mm |
| Depth | 87 mm |
| Mounting Type | DIN rail / panel mount |
| Weight | 0.14 kg – 0.90 kg (typical shipping 0.5–0.9 kg range) |
| Form Factor | Single-slot communication module |
5.5 Environmental Conditions
| Parameter | Value |
|---|---|
| Operating Temperature | -10°C to 50°C |
| Storage Temperature | -40°C to 85°C |
| Humidity | 5%–95% non-condensing |
| Vibration Resistance | Industrial standard (up to 5G) |
| Shock Resistance | Up to 30G |
6. Product Applications
The 1769-SM2 is widely used in drive communication and industrial motion systems.
Typical application areas:
- Conveyor motor control systems
- Variable frequency drive (VFD) systems
- Packaging machinery
- Material handling equipment
- Industrial HVAC systems
- Pump control systems
- Retrofit drive replacement projects
- Multi-motor coordination systems
Functional role:
- Drive communication gateway
- Multi-drive parameter control
- Serial network management
- Motor speed and status monitoring
7. Product Advantages
7.1 Strong Drive Integration Capability
Directly connects PLC systems to PowerFlex and compatible drive networks.
7.2 Dual Protocol Support
Supports both DSI and Modbus RTU, increasing system flexibility.
7.3 Multi-Drive Control
Allows centralized control of multiple drives from a single module.
7.4 Retrofit Friendly
Ideal for upgrading older serial drive systems without full replacement.
7.5 Compact Integration
Single-slot module reduces cabinet space requirements.
7.6 Stable Industrial Communication
Designed for noise-resistant operation in motor control environments.
8. Recommended Models (Same Series / Related Modules)
8.1 Same Series / Related Modules
| Model | Description | Key Parameters |
|---|---|---|
| 1769-SDN | DeviceNet scanner module | Up to 64 nodes fieldbus control |
| 1769-AENTR | Ethernet/IP adapter module | Dual-port Ethernet communication |
| 1769-SM1 | Legacy SCANport communication module | Drive interface expansion |
| 1769-IF8 | Analog input module | 8-channel signal acquisition |
| 1769-OB16 | Digital output module | 16-channel transistor output |
9. Recommended Models (Same Brand – Popular Modules)
| Model | Type | Key Parameters |
|---|---|---|
| 1769-L24ER | PLC Controller | Integrated CPU, Ethernet communication |
| 1769-L33ER | PLC Controller | High-performance processing |
| 1769-IQ16 | Digital Input Module | 16-channel discrete input |
| 1769-OB32 | Digital Output Module | 32-channel transistor output |
| 1769-OW16 | Relay Output Module | AC/DC switching outputs |
10. Summary
The 1769-SM2 is a dedicated drive communication module designed for Compact I/O PLC systems, enabling stable integration with DSI and Modbus RTU-based motor drives.
Its multi-protocol support, multi-drive control capability, and industrial robustness make it a key component in modern drive-based automation systems and retrofit applications.