- Model: MVI56-EGD
- Brand: ProSoft Technology
- Series: MVI56 (ControlLogix in-rack)
- Core Function: Bridge ControlLogix to GE Ethernet Global Data networks
- Type: GE Ethernet Global Data (EGD) communication module
- Key Specs: 10/100 Base-T, 800 mA @ 5.1 V, 0–60 °C, producer/consumer & command
Product Introduction
In ControlLogix installations where you need to talk natively to GE EGD devices, the ProSoft MVI56‑EGD is the in‑rack answer rather than bolting on an external Ethernet gateway. It occupies a single ControlLogix slot and presents GE Ethernet Global Data producer/consumer and command services over 10/100 Base‑T, while exposing the data to the PLC as a structured internal database.
The module is positioned for projects where a Logix CPU must both consume and produce EGD exchanges with GE PLCs or protection devices, using UDP ports 18246 and 7937 under an IP network. Typical backplane draw is 800 mA at 5.1 V with an operating range of 0–60 °C and 5–95% RH, so you need to recheck rack power and enclosure temperature before treating it as “just another Ethernet card.”
Key Selling Points & Differentiators
- Provides a direct GE Ethernet Global Data interface in the ControlLogix rack, so you do not need a separate EGD gateway panel or extra 24 V power feed in already crowded substations.
- Supports both EGD producer/consumer data sets and EGD command services over UDP, which covers most practical use cases when linking Logix to GE PLCs that already standardize on EGD.
- Backplane load of 800 mA @ 5.1 V is non-trivial; keeping at least ~20% headroom on the 5 V rail after adding this module is a sensible design rule to avoid thermal or intermittent faults in mixed racks.
- Compared with generic Ethernet bridging, the dedicated EGD driver enforces the correct ports and packet structure, which is far less error‑prone than trying to script EGD via a generic socket interface or an external PC.
- Not recommended for projects where the GE side is already migrating away from EGD to native EtherNet/IP or other open protocols; in those cases, you are better off aligning both sides on a common modern protocol and using a different module.
- For “stock spare” strategies, insist on a test report that shows GE EGD producer/consumer traffic and at least a 24‑hour burn‑in on a representative network, rather than relying on simple power‑on only.
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