Choosing a programmable logic controller often comes down to a simple trade: spend less upfront or get newer features. The Mitsubishi FX3G-60MR/ES and the Automation Direct P1-550 sit at opposite ends of that decision. One offers a familiar name and a much lower price; the other brings modern connectivity and fresh hardware. The right pick depends on your control panel, your budget, and how much risk you can accept with a pre-owned unit.
Quick verdict
If your priority is keeping costs down and you're comfortable with a non-new PLC, the Mitsubishi FX3G-60MR/ES is the pragmatic budget choice. If you need a CPU with network connectivity and roomy ladder memory, the Automation Direct P1-550 is the better investment.
Comparison table
| MITSUBISHI FX3G-60MR/ES | Automation Direct P1-550 | |
|---|---|---|
| Price | USD 70.00 | USD 211.65 |
| Condition | Used | New |
| Country of Origin | Japan | United States |
Where the Mitsubishi wins
The Mitsubishi FX3G-60MR/ES wins on upfront cost. The price gap shown in the table is substantial, and this unit is the cheaper way into a Mitsubishi-branded PLC. It also has the Mitsubishi label, which can be convenient if you're already working with that brand. That combination makes it a tempting option for a spare controller, a training rig, or a small machine.
Where the Automation Direct wins
The Automation Direct P1-550 wins on communications and memory. You get two Ethernet 10/100Base-T ports, a microSD card slot, RS-232, RS-485, microB-USB, and as much as 50 MB of ladder memory. It uses the Automate controller platform, so it's ready for a networked control design. For a data-heavy application, this is the PLC with the interfaces to handle it.
Product notes
MITSUBISHI FX3G-60MR/ES Programmable Logic Controller
This is the unit to choose when the budget is a hard limit and you're open to a used controller. At USD 70.00, it's the lowest-priced option in this head-to-head, and the Mitsubishi name gives it a familiar feel if you're already around that ecosystem. The used condition is the trade-off: it's not new, so give it a quick check before staking a production line on it. The Country of Origin is Japan, which is a concrete detail if your existing panels use Japanese components. If you're learning ladder logic or need a low-cost spare, this used Mitsubishi can fill that role without a big cash outlay.
NEW Automation Direct P1-550 Programmable Controller Productivity1000 CPU
The P1-550 is the pick when you want a brand-new CPU with modern communications built in. It includes two Ethernet 10/100Base-T ports, RS-232, RS-485, microB-USB, and a microSD slot, along with up to 50 MB of ladder memory. That makes it a solid choice for networked control, data logging, or a program that outgrows a small controller. It comes from the United States and runs the Automate controller platform. The one extra step: it requires external 24 VDC, so you'll need a suitable power supply in your cabinet. If you're starting a new build, this CPU gives you the ports and memory to handle a more complex control design.
Final choice by use case
Choose the Mitsubishi FX3G-60MR/ES if you need a low-cost PLC for a basic job, a spare, or a learning project. Choose the Automation Direct P1-550 if you require a CPU with network connectivity and substantial ladder memory for a more complex control system.
