When you are choosing a programmable logic controller for a small machine or a standalone piece of equipment, the decision usually comes down to two questions: how many inputs and outputs do you need, and how will the controller talk to the rest of your system? The Schneider Modicon M221 and the Allen-Bradley MicroLogix 1000 are two very different answers to those questions. One is a network-ready controller at a lower price; the other is a compact processor with more I/O points and a familiar control heritage.
Quick verdict
The Schneider Modicon M221 is the cleaner fit for a new networked machine. The Allen-Bradley MicroLogix 1000 is the better fit when you need a compact controller with a larger I/O footprint.
Comparison table
| Feature | Schneider Modicon M221 | Allen-Bradley MicroLogix 1000 |
|---|---|---|
| Price | USD 170.39 | USD 299.00 |
| Condition | New | New - Open box |
| Controller platform | Modicon M221 | MicroLogix1000 |
| I/O count | 24 I/O | 32 total I/O (20 inputs, 12 relay outputs) |
| Communication | Ethernet | RS-232 |
| Country of origin | Taiwan | United States |
Where each product wins
The Schneider Modicon M221 takes the lead when the machine needs to be networked. The TM221CE24R ships brand new and has Ethernet on board, which is the most direct way to connect to an HMI or a plant network. Its listed price also keeps the initial outlay lower.
The Allen-Bradley MicroLogix 1000 takes the lead when I/O density matters. The 1761-L32BWB provides 32 I/O points in a compact processor, and the unit is described as unused, open box, and perfect. It is a solid fit for a machine that needs more field wiring in a small footprint.
Product notes
Schneider TM221CE24R Modicon M221 Logic Controller, 24 I/O, Ethernet, Brand New
The TM221CE24R is a factory-sealed controller, which avoids the guesswork of open-box inventory. It is built in Taiwan and offers a compact I/O layout for a small machine. The built-in I/O count is on the low side, so plan ahead if you expect to expand your sensor and actuator count. For a clean, ready-to-install unit that keeps the panel simple, this is the more straightforward option.
UNUSED-Allen-Bradley Micrologix 1000 Controller Processor PLC Module 1761-L32BWB
The 1761-L32BWB is an unused open-box processor described as in perfect condition, so you get a ready-to-install unit without the sealed retail wrapper. It provides 32 I/O points in a compact package, which covers a machine with a decent number of inputs and outputs. The trade-off is the power requirement: 24V DC at up to 7W. Communication is via a serial port, so a panel that needs a network connection will require an additional converter. Pick it when I/O density matters more than networking.
Final choice by use case
If your machine is new and designed around network connectivity, the Schneider Modicon M221 is the more natural match. If your priority is gathering a larger number of field wires into one compact controller, the Allen-Bradley MicroLogix 1000 is the one.
