Purchase now: Allen-Bradley 1769-SM2 DSI/Modbus RTU Communication Module
Atlantechdrives provides you the 1769-SM2, a specialized 3-channel communication module designed to interface PowerFlex 4-class and 520-series drives with CompactLogix or MicroLogix 1500 controllers. This module is the industry standard for cost-effective drive integration, utilizing the DSI (Drive Serial Interface) protocol or standard Modbus RTU.
- Channels: 3 Independent DSI/Modbus RTU Ports
- Protocol Support: DSI (PowerFlex), Modbus RTU (Master)
- Update Rate: 5 ms per drive (typical)
- Backplane Current: 350 mA @ 5.1V
- Connection: RJ45 Ports
- Function: Drive control and status monitoring
Technical Superiority: Unified Drive Control over DSI
Get now the 1769-SM2 to simplify your motor control architecture. This module is engineered to offload the complexities of drive communication from the main PLC program. By utilizing the 1769-SM2, you can control the speed, direction, and acceleration of up to three PowerFlex drives via a single expansion slot. It also provides deep diagnostic access, allowing the PLC to monitor motor current, fault codes, and output frequency in real-time. The 1769-SM2 can also be configured as a Modbus RTU Master, enabling communication with third-party devices such as power meters or temp controllers. When you procure the 1769-SM2, you are gaining a flexible communication gateway that eliminates the need for expensive analog I/O for drive setpoints.
Expert Tips: Configuration and Multi-Drive Daisy Chaining
When installing the 1769-SM2, it is vital to correctly set the channel mode (DSI vs Modbus) in the module’s internal parameters. Each port can support multiple drives in a daisy-chain configuration if the total distance and power ratings are respected. We recommend using 120-ohm termination resistors at the end of the DSI/Modbus run to prevent signal reflections. Sourcing your 1769-SM2 from Atlantechdrives ensures you get a unit with high-quality RJ45 ports and verified isolation, protecting your backplane from drive-side electrical noise.
Maintenance and Hardware Integrity
The 1769-SM2 features status LEDs for each channel. Maintenance protocols should include verifying the RJ45 cable seating, as vibration can cause intermittent communication faults. If a «Drive Comm Fault» occurs, the 1769-SM2 can be programmed to trigger a safe stop on the associated motor. Sourcing an authentic 1769-SM2 from Atlantechdrives provides the hardware reliability and protocol stability required for 24/7 industrial uptime.
FAQs
Q: Can the 1769-SM2 control PowerFlex 525 drives?
A: Yes, it is compatible with the PowerFlex 520-series drives via the DSI port.
Q: Does it support Modbus TCP?
A: No, the 1769-SM2 is strictly for serial Modbus RTU and DSI protocols.
Do you need more references from this brand? Explore our full catalog of Allen-Bradley here.
This specialized DSI communication module is technically designed to be housed in a 1769 rack powered by a 1769-PA2 system supply.
