When you're building or upgrading an industrial control panel, two pieces of gear often end up in the same shopping cart: an HMI to talk to you and a PLC to talk to the machine. But they are not interchangeable. One of these products is an operator terminal, and the other is a programmable logic controller. The price gap is huge, and the wrong pick can leave you with a display that can't run your machine, or a controller that can't show you anything.
Quick verdict
The Allen Bradley PanelView Plus 7 Ser B Industrial HMI Touchscreen (2711P-T12W21D8S) is the right part if your control panel is missing an operator interface. It shows machine status, alarms, and controls for your process. The unit is used, and its screen has visible scratches and scuffs, with cosmetic wear on the bezel. The price is high for that condition.
The Mitsubishi FX3G-60MR/ES Programmable Logic Controller is the right part if you need the logic brain of the machine. It runs sequence control and handles inputs and outputs. It's also used, but it costs far less than the HMI. Just remember that this PLC won't give you a display by itself.
So the real decision is: do you need to see and operate your process, or do you need to compute and control it?
At a glance
| Product | Price | Type | Condition | Origin |
|---|---|---|---|---|
| Allen Bradley PanelView Plus 7 Ser B Industrial HMI Touchscreen 2711P-T12W21D8S | $799.99 | HMI | Used | United States |
| Mitsubishi FX3G-60MR/ES Programmable Logic Controller | $70.00 | PLC | Used | Japan |
Where each product wins
Allen Bradley wins if your machine or process already has a controller and you need an operator panel to interact with it. The PanelView Plus 7 is a dedicated interface, and it's built for that role. It's also made in the United States. The visible wear on the unit is something to weigh against that.
Mitsubishi wins if you need the controller itself. The FX3G-60MR/ES is a PLC that runs your program, and it comes from Japan. If you need a separate display, you can connect one; the PLC alone doesn't provide a screen.
Product notes
Allen Bradley PanelView Plus 7 Ser B Industrial HMI Touchscreen 2711P-T12W21D8S
This is the operator's window into your machine. It has a color touchscreen, which is the key feature you need from an HMI. It's a 2018 unit made in the United States. Choose it when your control panel already has a PLC and you're missing the display layer. The main limitation is the price: at $799.99, it's a significant investment for a used unit that shows visible scratches and scuffs on the screen, plus cosmetic wear on the bezel. If the cosmetic wear doesn't affect touch performance, this is a capable HMI for your panel.
Mitsubishi FX3G-60MR/ES Programmable Logic Controller
This is the logic brain for a control system. As a PLC, it runs your sequence programs and handles inputs and outputs. For $70, it provides PLC functions for your build. The main limitation is that it doesn't include a display, so you'll need a separate HMI for operator interaction. It's also used, which means you should go in with the same caution you'd have with any used electromechanical part. Built in Japan, this Mitsubishi PLC fits when you need the controller element without a built-in screen.
Final choice by use case
If your panel already has a controller and you need a way for an operator to see machine status and enter commands, choose the Allen Bradley PanelView Plus 7. It delivers a touchscreen interface, and despite the visible wear, it's purpose-built for that job. If you're starting a project that needs logic control, or you need a spare PLC, the FX3G-60MR/ES is the sensible buy. The HMI makes sense only if the display is the missing piece; the PLC makes sense only if you need the brain. If your panel lacks both, you'll eventually want both parts-but when you have to pick one first, get the one that fills the biggest gap in your system.
