When you need an operator interface for a PLC, the first fork in the road is whether you need a complete HMI or just the front-panel parts to fix one you already own. Two options in the PLC-HMI space land within a few dollars of each other, but they are not really competing for the same job. The Delta DOP-107EG is a new touchscreen HMI. The Siemens KTP700 Membrane Keypad + Touchpad 6AV2123-2GB03-0AX0 HMI Repair Kit is a used replacement front-layer assembly. The right pick depends on whether you are building, replacing, or repairing.
Quick verdict: Choose the Delta DOP-107EG when you want a new, complete operator terminal. Choose the Siemens KTP700 repair kit when you already have a KTP700 panel and need to swap out the membrane keypad or touchpad.
| Consideration | Delta DOP-107EG | Siemens KTP700 Repair Kit |
|---|---|---|
| Listed price | USD 190.40 | USD 181.39 |
| Price bar | ||
| Condition | New | Used |
| Country of Origin | Taiwan | China |
| Model / Type | dop-107eg / PLC Processor Module | PLC / PLC |
| What it is | Complete HMI touchscreen | Membrane keypad + touchpad repair kit |
Where each product wins:
- Delta DOP-107EG: The better choice for a new build or a full HMI replacement. It is a new unit from Taiwan with a specific model number and processor-module classification.
- Siemens KTP700 repair kit: The better choice for a targeted repair. It is the exact membrane keypad and touchpad assembly for the 6AV2123-2GB03-0AX0 KTP700.
Delta DOP-107EG HMI Touch Screen
The Delta DOP-107EG makes sense when the project calls for a new HMI rather than a spare part. At USD 190.40, it is the higher-priced of the two, but it is a new touchscreen unit with model dop-107eg and a PLC Processor Module type. The Taiwan country of origin pairs with the new condition, which can be a deciding factor for control-panel builders. For a fresh build or a complete operator-interface swap, this is the option that gives you one intact screen rather than a repair component. The limitation is that it does not solve a front-panel-only problem: if your existing HMI just needs a new membrane keypad or touchpad, this full touchscreen is more than the job requires, and you would spend slightly more for functionality you may not use.
Siemens KTP700 Membrane Keypad + Touchpad 6AV2123-2GB03-0AX0 HMI Repair Kit
The Siemens KTP700 repair kit is the pick when the panel itself is still serviceable and the front control surface is what needs attention. It is the lower-priced of the two options, and it covers both the membrane keypad and the touchpad for the 6AV2123-2GB03-0AX0 KTP700. That specificity is the main reason to choose it: you are buying the exact front-panel replacement part instead of a whole new HMI. The trade-off is that this is a used item from China, and its type is listed as PLC without the deeper processor-module classification found on the Delta. For someone who needs a complete, new operator terminal, this kit is not the right starting point; it is a repair component, not a full HMI.
Final choice by use case:
If you are putting together a new control panel or replacing an entire HMI, go with the Delta DOP-107EG. If you are maintaining an existing KTP700 and the membrane keypad or touchpad is the part that needs to be replaced, choose the Siemens KTP700 repair kit. Matching the product to the job matters more than the modest price difference.
