Description

PROSOFT MVI69L-MBS
PROSOFT MVI69L-MBS is an economical Modbus serial communication module for Rockwell CompactLogix (1769 series). It has a single slot, one configurable serial port, and supports Modbus RTU/ASCII master/slave stations. It is used for connecting frequency converters, instruments, and third-party serial port devices.

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Core Specifications
Brand / Model: PROSOFT MVI69L-MBS
Platform: CompactLogix 1769 backplane, single slot
Serial Ports: 1×RS-232/422/485 (software configuration)
Protocols: Modbus RTU (CRC-16), ASCII (LRC)
Master Station Capabilities: Up to 30 commands
Slave Station Address: 1–247
Data Area: 240 bytes read / 240 bytes write (total 480 bytes)
Baud Rate: 110–115.2 kbps
Electrical: 5VDC, maximum 450mA
Temperature: 0°C ~ +60°C (operating); -40°C ~ +85°C (storage)
Size / Weight: Standard 1769 single slot / approximately 0.15kg
Firmware Features: Add-on Profile, UDT, diagnostic tag, configuration stored in ACD project

Key features
Master-slave integration: The serial port can be set as a Modbus master station (for polling multiple devices) or a slave station (for being accessed by the upper computer).
Co-processor design: Independently handles Modbus communication, without occupying the PLC scanning time.
Quick integration: RSLogix 5000 can directly use the built-in Add-on instructions/UDT, eliminating the need to write complex ladder diagrams.
Floating-point support: Compatible with Enron/Daniel floating-point format, suitable for instruments and the energy industry.
Comprehensive diagnostics: Controller labels can directly read port status, error codes, and communication counts.
Typical application
CompactLogix connects with third-party Modbus serial devices, frequency converters, temperature control meters.
Communicates with small-scale SCADA, building automation, energy monitoring, and water treatment equipment.
Replaces the old 1769-SM2, offering better cost performance and simpler configuration.