The ProSoft MVI56-DFCM is a DF1 Master/Slave serial communication module for the Rockwell Automation ControlLogix platform. It enables seamless integration between ControlLogix processors and DF1-compatible devices, allowing the system to act as a SCADA sub‑master or slave on a DF1 network.
Item No :
MVI56-DFCMOrder(MOQ) :
1 PiecePayment :
EXWProduct Origin :
USAShipping Port :
WuhanLead Time :
3-5daysWeight :
3KGPart Number: MVI56-DFCM
Product Type: DF1 Master/Slave Serial Communication Module
Platform: Rockwell Automation ControlLogix (1756 backplane), single‑slot
Protocol Support: DF1 half‑duplex and full‑duplex
Serial Ports: Two application ports + one configuration/debug port
Baud Rate: 110 to 115.2 kbps
Data Exchange: Up to 5000 registers between processor and network; command read/write length up to 125 words
Backplane Current Load: 800 mA @ 5 V DC
Command List: Up to 100 fully configurable commands per master port
Configuration: ProSoft Configuration Builder software with sample ladder logic provided
Operating Temperature: 0°C to 60°C (32°F to 140°F)
Included Accessories: RS‑232 null modem cable, RJ45‑to‑DB9 adapter cable, two DB9‑to‑screw terminal adapters for RS‑422/RS‑485 connections
| Category | Model | Key Features |
|---|---|---|
| Enhanced Replacement | MVI56E-DFCM | Ethernet‑enabled version with web server, scrolling LED diagnostics, and CIPconnect remote access; backward‑compatible with MVI56‑DFCM |
| Remote Chassis Version | MVI56-DFCMR | Same core DF1 functionality, designed for remote rack applications |
| Modern Upgrade Path | PLX51‑DF1‑ENI | Protocol gateway that migrates DF1 serial to EtherNet/IP; recommended as an alternative migration path |
| Multi‑Protocol Module | MVI56E‑MCM | Modbus communication module for applications needing broader protocol support |
Q1: What is the primary application for the MVI56-DFCM?
It is used to connect ControlLogix processors to DF1‑compatible devices such as legacy Rockwell Automation PLCs, SCADA systems, and field instruments—allowing the ControlLogix system to act as either a master or slave on a DF1 network.
Q2: Can the two ports operate independently?
Yes. Each of the two application ports can be independently configured as a DF1 master, a DF1 slave, or any combination thereof.
Q3: Is ladder logic required in the ControlLogix processor?
Yes. Ladder logic is required for data transfer between the module and the ControlLogix processor. A sample ladder program and Add‑On Instructions (AOI) are provided for RSLogix 5000 version 16 and later.
Q4: What is the difference between MVI56‑DFCM and MVI56‑DFCMR?
The standard MVI56‑DFCM is used for local rack installations. The MVI56‑DFCMR variant is designed for remote rack applications where the module is physically located in a different chassis from the processor.
Q5: Does the MVI56‑DFCM provide DH+ network bridging?
No. The MVI56‑DFCM is a DF1 serial communication module and does not bridge to DH+ networks. For pure DH+ connectivity, alternative solutions such as the 1756‑DHRIO or migrating to EtherNet/IP should be evaluated.
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