When you're shopping for PLCs and HMIs, the controller is the brain of your control panel. Two new options face you: the Automation Direct P1-550 Productivity1000 CPU at $211.65 and the Mitsubishi FX3U-32MT/ES-A at $116.96. The $94.69 gap hints at different roles. The P1-550 is a CPU-class unit with generous memory and networking options; the Mitsubishi is a PLC Processor Module. Here's how to choose.
The right choice comes down to how much of that capability you'll actually use.
Quick verdict
If your program is large or needs Ethernet and removable storage directly on the CPU, the Automation Direct P1-550 is worth the extra money. If you need a simple, new PLC for a cost-sensitive control task, the Mitsubishi FX3U-32MT/ES-A is the lower-priced choice.
At a glance
| Feature | Automation Direct P1-550 | Mitsubishi FX3U-32MT/ES-A |
|---|---|---|
| Listed price | USD 211.65 | USD 116.96 |
| Controller platform | Automate | Programmable Logic Controller |
| Type | CPU (Central Processing Unit) | PLC Processor Module |
| Condition | New | New |
Where each product wins
Where the P1-550 wins: it's the CPU-class option. The 50 MB ladder memory, microSD card slot, and two Ethernet 10/100Base-T ports make it easy to build a networked control system. It also adds RS-232, RS-485, and microB-USB connections.
Where the Mitsubishi wins: it's the lower-priced option. The lower listed price keeps the upfront controller cost down while still giving you a PLC Processor Module. For a simple machine or standalone control task, that is a practical trade.
Product notes
Automation Direct P1-550
The Automation Direct P1-550 is the higher-priced controller because it's the higher-capability unit. You get up to 50 MB of ladder memory, a microSD card slot, and two Ethernet 10/100Base-T ports, along with RS-232, RS-485, and microB-USB. That's a complete CPU for projects that need to store data, connect to a network, or keep room for a larger program. The limitation is on the input side: the P1-550 requires an external 24 VDC supply, so you'll need that power source in the panel. If you're already running 24 VDC, the P1-550 is the clear step up. For a panel that already has 24 VDC available and a program that will grow, this CPU gives you the headroom without a lot of extra wiring.
Mitsubishi FX3U-32MT/ES-A
The Mitsubishi FX3U-32MT/ES-A is the lower-priced controller in this pair. It's a new PLC Processor Module, and the lower price makes it a natural fit for straightforward PLC duties where a full CPU isn't necessary. The tradeoff is that you're buying a processor module rather than the higher-specified CPU, so the choice comes down to whether the P1-550's extra memory and connectivity are worth the higher price. For a simple machine or a basic logic controller, that's a fair trade. If your project needs the bigger processor, spend up for the P1-550. If you're building a small control panel and want to keep the controller cost in check, this Mitsubishi gets you running with less cash tied up in the brain of the system.
Final choice by use case
- For a networked control panel with a large program: Automation Direct P1-550.
- For a cost-sensitive standalone PLC: Mitsubishi FX3U-32MT/ES-A.
