When you're filling out an automation cabinet, the first question is usually whether the missing piece runs the logic or shows it to an operator. That's the fork this head-to-head helps you cross. On one side is a Siemens SIMATIC HMI touch screen; on the other is an Omron PLC. They are different tools, and the right pick depends on which slot in your control system is empty.
Quick verdict
If your automation setup needs an operator-facing panel, choose the Siemens SIMATIC HMI KTP700 Touch Screen. If you need a programmable logic controller with the NX102-9000 model and prefer the lower-priced option, choose the TESTED Omron NX102-9000 PLC.
At a glance
| Product | Price | Role | Choose it for |
|---|---|---|---|
| 6AV2123-2GB03-0AX0 Siemens SIMATIC HMI KTP700 Touch Screen | USD 614.00 | HMI touch screen with S7/300 controller platform | Operator interface and display duties |
| TESTED Omron NX102-9000 PLC Programmable Logic Controller | USD 499.00 | Programmable logic controller | Logic control and automation tasks |
Where the Siemens HMI wins
The Siemens SIMATIC HMI KTP700 is the product in this comparison built for operator interaction. It belongs to the SIMATIC HMI family, and its specified controller platform is S7/300. If your cabinet already has a PLC running the logic and you need a touch screen for monitoring and manual control, this is the component that fills that gap. It carries the higher price, which makes sense when the project is HMI-first rather than controller-first.
Where the Omron PLC wins
The TESTED Omron NX102-9000 PLC is the product in this comparison built to execute control logic. The model number NX102-9000 appears in the product name. If your system needs the controller itself-the device that reads inputs, runs the program, and drives outputs-this is the one for that role. It also sits on the lower end of the price range, leaving more room in the budget for additional cabinet components.
Product notes
6AV2123-2GB03-0AX0 Siemens SIMATIC HMI KTP700 Touch Screen
The 6AV2123-2GB03-0AX0 Siemens SIMATIC HMI KTP700 Touch Screen is the operator-facing half of this pair. Its product name places it in the SIMATIC HMI family, and it is specified for the S7/300 controller platform. Choose it when you need a touch panel in front of your control system, not the controller itself. The main limitation is that it cannot replace a PLC; you still need a programmable logic controller somewhere in the architecture to execute the actual control program. The HMI is there to display status and accept operator input, so it makes sense when the missing piece in your cabinet is the interface, not the logic.
TESTED Omron NX102-9000 PLC Programmable Logic Controller
The TESTED Omron NX102-9000 PLC Programmable Logic Controller is the control-oriented option in this comparison. The product name identifies it as a PLC with the NX102-9000 model, and it is offered as a used unit. Choose it when the actual controller is what your automation setup needs-the device that runs the sequence and makes the decisions. The limitation is the flip side of that strength: it is not an HMI, so you cannot use it to give operators a graphical touch interface. The used condition is another trade-off, though the price reflects that status.
Final choice by use case
For an operator station, the Siemens SIMATIC HMI KTP700 at USD 614.00 is the product to choose. For logic control on a tighter budget, the TESTED Omron NX102-9000 PLC at USD 499.00 is the more direct and lower-priced pick. If the cabinet needs both roles, treat them as complementary: one runs the program, the other lets operators interact with it.
