ProSoft Technology MVI56-MBP Modbus Plus Communication Module | Replacement, Equivalent & Selection Guide
The ProSoft Technology MVI56-MBP is a Modbus Plus (MB+) communication module designed for the Rockwell Automation Allen-Bradley ControlLogix platform. It enables seamless integration between ControlLogix PLCs and Modbus Plus networks — commonly found in legacy Schneider Electric / Modicon systems — making it a critical bridge module for industrial automation upgrades, retrofits, and multi-vendor system integration.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number / SKU | MVI56-MBP |
| Manufacturer | ProSoft Technology |
| Series | MVI56 (ControlLogix In-Chassis) |
| Protocol | Modbus Plus (MB+) |
| Backplane Interface | Allen-Bradley ControlLogix 1756 backplane |
| MB+ Ports | 2 × Modbus Plus ports (dual-port) |
| Node Addressing | 1–64 nodes per MB+ network |
| Data Transfer | Up to 32 words per node (read/write) |
| Power Consumption | 800 mA @ 5 VDC (from backplane) |
| Operating Temperature | 0°C to 60°C (32°F to 140°F) |
| Storage Temperature | -40°C to 85°C |
| Humidity | 5% to 95% non-condensing |
| Certifications | UL, CE, RoHS |
| Form Factor | Single-slot ControlLogix module |
| Weight | ~360 g |
Compatible Replacement & Equivalent Models
When the MVI56-MBP is discontinued, unavailable, or cost-prohibitive, the following alternatives are commonly evaluated:
| Model | Manufacturer | Protocol | Platform | Notes |
|---|---|---|---|---|
| MVI56E-MBP | ProSoft Technology | Modbus Plus | ControlLogix | Enhanced version; direct drop-in upgrade with Ethernet config port |
| MVI56-MCM | ProSoft Technology | Modbus RTU/ASCII | ControlLogix | Alternative if migrating from MB+ to Modbus RTU |
| MVI69-MBP | ProSoft Technology | Modbus Plus | CompactLogix | Use for CompactLogix 1769 platforms instead |
| MVI71-MBP | ProSoft Technology | Modbus Plus | PLC-5 | Legacy PLC-5 platform equivalent |
| 174 CEV 300 10 | Schneider Electric | Modbus Plus | Modicon Quantum | Native MB+ on Modicon side; not a direct replacement |
Recommended direct replacement: MVI56E-MBP — same functionality with added Ethernet configuration port and improved diagnostics.
Why Choose the Original MVI56-MBP
- Proven field reliability — deployed in thousands of industrial sites globally across oil & gas, water treatment, and manufacturing
- Native ControlLogix integration — communicates via backplane using standard Add-On Instructions (AOI) and ladder logic
- Dual MB+ ports — supports two independent Modbus Plus networks simultaneously for redundancy or multi-network topologies
- Transparent data mapping — maps MB+ global data and peer-to-peer messaging directly into ControlLogix controller tags
- Extensive documentation — ProSoft provides full user manuals, sample ladder logic, and AOI libraries
Typical Applications
- Integrating Allen-Bradley ControlLogix with legacy Modicon Quantum / Premium / Momentum PLCs
- Retrofitting Modbus Plus networks without replacing field devices
- SCADA/DCS gateway bridging between MB+ and EtherNet/IP networks
- Oil & gas pipeline control systems with mixed-vendor architectures
- Water & wastewater treatment plant automation upgrades
- Power generation and substation automation
System Compatibility
- PLC Platform: Allen-Bradley ControlLogix 1756 series (all chassis sizes)
- Firmware: Compatible with RSLogix 5000 / Studio 5000 Logix Designer
- MB+ Network: Compatible with all Modbus Plus-enabled Schneider Electric / Modicon devices
- Configuration: ProSoft Configuration Builder (PCB) software — free download
- Not compatible with: CompactLogix 1769 (use MVI69-MBP), SLC 500 (use MVI46-MBP), or PLC-5 (use MVI71-MBP)
Selection Guide
Use this guide to confirm the MVI56-MBP is the right module for your application:
| Requirement | Recommended Model |
|---|---|
| ControlLogix 1756 + Modbus Plus network | MVI56-MBP ✓ |
| ControlLogix 1756 + Modbus Plus + Ethernet config | MVI56E-MBP (upgrade) |
| CompactLogix 1769 + Modbus Plus | MVI69-MBP |
| ControlLogix + Modbus RTU/ASCII (not MB+) | MVI56-MCM |
| PLC-5 + Modbus Plus | MVI71-MBP |
| SLC 500 + Modbus Plus | MVI46-MBP |
Quality Assurance & Sourcing
- Source: Konmask.com sources MVI56-MBP units from authorized distributors and verified surplus channels
- Inspection: All modules undergo visual inspection, label verification, and functional testing prior to shipment
- Condition: New, refurbished, and tested-used units available — condition clearly stated on each listing
- Warranty: 90-day replacement warranty on all units shipped from Konmask.com
- Counterfeit prevention: Serial number and firmware version verified against ProSoft records where possible
How to Order
- Confirm your PLC platform is ControlLogix 1756 series
- Verify you require Modbus Plus (MB+) protocol — not Modbus RTU/ASCII
- Select quantity and condition (new / refurbished / tested-used)
- Add to cart and proceed to checkout, or contact us for bulk pricing
- For urgent requirements, email support@konmask.com with your PO or RFQ
📦 Lead time: In-stock units ship within 1–3 business days. Contact us for ETA on out-of-stock items.
Replacement & Compatibility FAQ
Q: Is the MVI56E-MBP a direct drop-in replacement for the MVI56-MBP?
A: Yes. The MVI56E-MBP is backward-compatible and uses the same ladder logic and AOI. The only addition is an Ethernet port for configuration — no rewiring required.
Q: Can I use the MVI56-MBP on a CompactLogix system?
A: No. The MVI56-MBP is designed exclusively for the ControlLogix 1756 backplane. Use the MVI69-MBP for CompactLogix 1769.
Q: Does the MVI56-MBP support Modbus RTU or Modbus TCP?
A: No. This module is specifically for Modbus Plus (MB+), which is a proprietary Schneider Electric/Modicon token-passing network. For Modbus RTU, use the MVI56-MCM.
Q: What software is needed to configure the MVI56-MBP?
A: ProSoft Configuration Builder (PCB), available as a free download from ProSoft Technology’s website, plus RSLogix 5000 / Studio 5000 for the ControlLogix side.
Q: Is the MVI56-MBP still in production?
A: ProSoft Technology has transitioned to the MVI56E-MBP as the current production model. The MVI56-MBP is available as new-old-stock (NOS) and refurbished units through authorized surplus suppliers like Konmask.com.
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