ProSoft Technology MVI56-DFCM – DF1 Full-Duplex Communication Module | ControlLogix Platform
Engineering Background: The MVI56-DFCM is a single-slot ControlLogix backplane communication module developed by ProSoft Technology to bridge Allen-Bradley DF1 Full-Duplex serial networks with Rockwell Automation’s ControlLogix PLC platform. It enables seamless integration of legacy DF1 devices—such as older SLC 500 and PLC-5 systems—into modern ControlLogix architectures without gateway hardware or protocol converters.
Product Positioning: Designed for automation engineers managing brownfield upgrades, the MVI56-DFCM eliminates the need for standalone protocol converters by embedding DF1 master/slave communication directly into the ControlLogix chassis. It is the preferred solution for facilities maintaining mixed-generation Allen-Bradley networks where DF1 serial communication remains operationally critical.
Complete Technical Specifications
- Part Number / SKU: MVI56-DFCM
- Manufacturer: ProSoft Technology
- Platform Compatibility: Allen-Bradley ControlLogix (1756 series)
- Protocol: DF1 Full-Duplex (Allen-Bradley proprietary serial)
- Backplane Interface: ControlLogix 1756 backplane (single slot)
- Serial Ports: 2 × RS-232/RS-422/RS-485 configurable ports
- Baud Rate: 110 bps – 115.2 kbps
- Data Format: BCD, Integer, Float, ASCII
- Max Nodes (Slave Mode): Up to 255 DF1 nodes
- Memory: 4,000 registers (user-configurable)
- 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
- Dimensions: Standard 1756 single-slot module
- Weight: 220 g (approx.)
- Certifications: UL, CE, RoHS compliant
- Firmware: Field-upgradeable via ProSoft Configuration Builder (PCB)
- Configuration Tool: ProSoft Configuration Builder (free download)
Proven Application Environments
- Brownfield ControlLogix migration from SLC 500 / PLC-5 systems retaining DF1 serial devices
- Oil & gas SCADA systems integrating legacy RTUs via DF1 Full-Duplex
- Automotive assembly lines with mixed Allen-Bradley PLC generations
- Water/wastewater treatment facilities using DF1 serial instrumentation
- Power generation and distribution control panels
- Food & beverage processing with existing DF1 HMI/SCADA links
- Mining and material handling with remote DF1 slave devices
Engineering Advantages
- Single-slot integration: No external gateway hardware; module resides directly in the ControlLogix chassis
- Dual-port flexibility: Two independently configurable serial ports support simultaneous master and slave operation
- High node capacity: Supports up to 255 DF1 slave nodes per port for large network topologies
- Transparent data mapping: Direct tag-based data exchange with ControlLogix controller via backplane; no ladder logic polling required
- Diagnostic LEDs: Real-time port status, communication activity, and error indication on front panel
- Free configuration software: ProSoft Configuration Builder (PCB) provides intuitive setup, diagnostics, and firmware management
- Rockwell-compatible EDS file: Plug-and-play recognition in RSLogix 5000 / Studio 5000
System Architecture & Signal Flow
The MVI56-DFCM occupies one slot in the ControlLogix 1756 chassis. The module’s internal processor manages DF1 Full-Duplex communication on its serial ports independently of the ControlLogix CPU. Data is exchanged between the module’s internal register memory and the ControlLogix controller tags via the backplane using MSG instructions or automatic block-transfer. The configuration file (stored on the module’s onboard flash) defines node addresses, baud rates, data mapping, and error-handling behavior. Signal flow: DF1 Serial Device → MVI56-DFCM Serial Port → Module Internal Memory → ControlLogix Backplane → Controller Tag Database → HMI / SCADA.
Sourcing & Quality Verification
- All MVI56-DFCM units sourced through verified industrial automation supply channels
- Each unit inspected for physical integrity, label authenticity, and firmware version prior to shipment
- Original OEM packaging preserved where available; condition disclosed at time of quotation
- Traceability documentation (lot number, revision, firmware) provided upon request
- 30-day return policy for DOA units; warranty terms disclosed per order
Procurement Process
- Submit your part number (MVI56-DFCM) and required quantity via the quote form or email
- Receive availability confirmation and pricing within 1 business day
- Review and approve proforma invoice
- Payment via T/T, PayPal, or approved credit terms
- Shipment via DHL / FedEx / UPS with full tracking; export documentation included
- Post-delivery technical support available via email or WhatsApp
Technical FAQ
Q: Is the MVI56-DFCM compatible with Studio 5000 / RSLogix 5000?
A: Yes. The module ships with an EDS file and sample Add-On Instructions (AOI) compatible with RSLogix 5000 v16+ and Studio 5000 v21+.
Q: Can the MVI56-DFCM operate as both DF1 master and slave simultaneously?
A: Yes. Each of the two serial ports can be independently configured as master or slave, enabling simultaneous multi-role operation.
Q: What cable is required for RS-232 DF1 connection?
A: A standard DB-9 null-modem or straight-through cable depending on the target device’s DTE/DCE configuration. ProSoft provides wiring diagrams in the user manual.
Q: Is firmware upgrade possible in the field?
A: Yes. Firmware is upgradeable via ProSoft Configuration Builder (PCB) over the serial port without removing the module from the chassis.
Q: What is the lead time for MVI56-DFCM?
A: In-stock units ship within 1–3 business days. Contact us for current availability.
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