Modbus Serial Communication Solution – ProSoft Technology MVI69L-MBS | MVI69L Series
Where This Product Is Used
The ProSoft MVI69L-MBS is deployed in industrial environments where CompactLogix PLCs must communicate with legacy Modbus RTU/ASCII field devices. Typical deployment scenarios include:
- Water & Wastewater Treatment Plants – Integrating flow meters, level sensors, and pump drives via Modbus RTU over RS-232/RS-485.
- Oil & Gas Upstream/Midstream – Connecting remote terminal units (RTUs) and SCADA field instruments to Allen-Bradley CompactLogix controllers.
- Building Automation Systems (BAS) – Linking HVAC drives, energy meters, and chillers that use Modbus ASCII protocol.
- Food & Beverage Processing – Bridging legacy weighing systems, temperature controllers, and variable frequency drives (VFDs) to modern PLC networks.
- Discrete Manufacturing – Enabling Modbus master polling of third-party sensors and actuators on the plant floor.
- Power Distribution & Utilities – Reading power quality meters and protection relays via Modbus serial in substation automation.
Technical Specifications
- Part Number: MVI69L-MBS
- Series: MVI69L (CompactLogix Lite Series)
- Manufacturer: ProSoft Technology
- Protocol: Modbus RTU / Modbus ASCII (Master & Slave)
- Serial Ports: 1 × RS-232 / RS-485 / RS-422 (software-selectable)
- Baud Rate: 110 – 115,200 bps
- Backplane Interface: 1769 CompactLogix backplane (side-car mount)
- Max Modbus Nodes: Up to 247 slave devices per port
- Register Support: Coils (0x), Discrete Inputs (1x), Input Registers (3x), Holding Registers (4x)
- Power Consumption: 800 mA @ 5 VDC (from backplane)
- Operating Temperature: 0°C to 60°C (32°F to 140°F)
- Dimensions: 1769 single-slot form factor
- Weight: 150 g (approx.)
- Certifications: UL Listed, CE Marked, RoHS Compliant
Why Engineers Specify This Model
- Lite Form Factor – The MVI69L series occupies a single 1769 slot and draws less backplane power than full-size MVI69 modules, ideal for space-constrained panels.
- Dual Master/Slave Operation – Simultaneously acts as Modbus master (polling field devices) and slave (responding to SCADA/HMI queries) without additional hardware.
- ProSoft Configuration Manager (PCM) – Free Windows-based software for rapid configuration, diagnostics, and live data monitoring without going online with Studio 5000.
- Seamless Studio 5000 Integration – Add-On Instructions (AOI) and sample ladder logic included, reducing commissioning time significantly.
- Proven Reliability – MVI69L-MBS is a field-proven module with global installations across critical infrastructure sectors.
- Flexible Serial Interface – Software-selectable RS-232/RS-485/RS-422 eliminates the need for external converters in most wiring topologies.
Complete System Bill of Materials
For a complete Modbus serial integration with CompactLogix, engineers typically specify:
- ProSoft MVI69L-MBS – Modbus Serial Lite Communication Module (this item)
- Allen-Bradley 1769-L24ER-QB1B or compatible CompactLogix CPU
- 1769-PA2 or 1769-PB2 Power Supply
- 1769-ECR / 1769-ECL End Cap
- RS-485 shielded twisted-pair cable (Belden 9841 or equivalent)
- ProSoft Configuration Manager (PCM) software – free download
- Studio 5000 Logix Designer (v20 or later recommended)
Compliance & Industry Standards
- UL 508 – Industrial Control Equipment
- CE Marking – EMC Directive 2014/30/EU & Low Voltage Directive 2014/35/EU
- RoHS – Restriction of Hazardous Substances Directive compliant
- Modbus.org – Compliant with official Modbus Application Protocol Specification V1.1b3
- IEC 61131-3 – Compatible with IEC-standard PLC programming environments
Quality Assurance & Sourcing
Konmask.com sources the ProSoft MVI69L-MBS through verified industrial automation distributors and authorized supply channels. Every unit undergoes:
- Visual and physical inspection upon receipt
- Firmware version verification against ProSoft Technology release notes
- Packaging integrity check to ensure ESD-safe handling
- Serial number traceability documentation available on request
We do not supply counterfeit, refurbished-as-new, or grey-market components. All products ship with original manufacturer packaging where available.
How to Source This Part
To place an order or request a quote for the ProSoft MVI69L-MBS:
- Online: Add to cart directly on this page for standard lead times.
- Bulk / Project Inquiry: Email support@konmask.com with your project BOM for volume pricing.
- Phone / WhatsApp: +0086 19859288691 (Mon–Fri, 09:00–18:00 CST)
- Lead Time: Typically 3–7 business days for in-stock units; 2–4 weeks for special orders.
- Export: We ship globally. DDP/DAP Incoterms available for international projects.
Application-Specific FAQ
Q: Can the MVI69L-MBS act as both Modbus master and slave simultaneously?
A: Yes. The module supports concurrent master and slave operation on the same serial port, enabling bidirectional data exchange between field devices and SCADA systems.
Q: Is the MVI69L-MBS compatible with CompactLogix L3x and L2x series?
A: Yes, it is compatible with all 1769 CompactLogix platforms including L23, L24, L27, L30, L31, L32, L35, and L36 series controllers.
Q: What is the difference between MVI69L-MBS and MVI69-MBS?
A: The MVI69L-MBS is the Lite version — it has one serial port (vs. two on the full MVI69-MBS) and lower power consumption, making it ideal for applications requiring a single Modbus serial channel.
Q: Does this module support Modbus TCP?
A: No. The MVI69L-MBS is a serial Modbus module (RTU/ASCII). For Modbus TCP over Ethernet, consider the ProSoft MVI69L-MBTCP.
Q: Can I use this module with RSLogix 5000?
A: Yes. RSLogix 5000 (now Studio 5000 Logix Designer) is fully supported. ProSoft provides sample AOI and ladder logic files for rapid integration.
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