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Key Technical Specifications
- Product Model: MVI69L-MBS
- Manufacturer: ProSoft Technology
- Belonging System: Allen-Bradley CompactLogix (1769 Backplane)
- Function: Modbus Serial Lite Communication Module
- Serial Interface: RS-232
- Baud Rate: 110 to 115.2 Kbaud
- Data Bits: 7 or 8
- Parity: None, Even, Odd
- Stop Bits: 1 or 2
- I/O Size: 240/240 – 16 bit integers
- Current Load: 450 mA max @ 5 VDC
- Operating Temperature: 0°C to 60°C
- Storage Temperature: -40°C to 85°C
Core Performance & Selection Advantages
The ProSoft MVI69L-MBS is a dedicated communication module designed to bridge the gap between modern Allen-Bradley CompactLogix controllers and the widely used Modbus RTU serial protocol. Its primary advantage lies in its co-processor architecture, which offloads the communication processing from the main PLC CPU. This design significantly reduces the impact on the PLC scan time, ensuring that real-time control tasks are not compromised by communication overhead. The module supports both Master and Slave modes, allowing it to actively poll devices or respond to requests from external systems. With support for up to 240 words of I/O data and configurable floating-point data handling (including Enron and Daniel styles), it provides a robust solution for integrating legacy serial devices into modern automation systems. Its compact form factor and low power consumption make it ideal for space-constrained applications.
MVI69L-MBS PROSOFT
System Integration & Scalability
The MVI69L-MBS integrates seamlessly into the Allen-Bradley CompactLogix ecosystem through its use of an Add-On Profile (AOP) and Add-On Instruction (AOI). This integration simplifies configuration within the Rockwell Automation Studio 5000 environment, reducing commissioning time and minimizing programming errors. The module’s diagnostic data is directly accessible in the processor’s controller tags, providing real-time visibility into the health of the Modbus network and connected devices. As a single-slot module on the 1769 backplane, it offers a plug-and-play solution that can be easily added to existing systems without requiring major hardware modifications. While it is designed for smaller applications with a single serial port, its reliability and ease of use make it a scalable choice for distributed I/O systems that rely on serial communication.
