Choosing the perfect industrial panel PC can be a daunting task, given the myriad of options and specifications available. Whether you're upgrading your current system or starting a new industrial automation project, selecting the right panel PC is crucial for ensuring optimal performance, reliability, and efficiency'especially for human-machine interface (HMI) applications.
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With various factors to consider, from understanding specific application requirements to evaluating hardware specifications and environmental conditions, it's essential to equip yourself with the knowledge needed to make an informed decision. Let's walk through the key considerations that will help you select the best industrial panel PC for your operational needs.
A touch screen combines display functions (screen) and pointing device functions (mouse). There are two types of touchscreen technology:
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These touchscreens are made of two conductive layers separated by a layer of insulation. When the user touches a layer, the two conductive films come into contact, which causes a current to flow. The system will detect a variation in resistivity in the conductive layers and determine the coordinates of the contact point on the screen. A resistive touchscreen responds when touched by a stylus, gloved hand, bare finger, nail, etc. This type of touchscreen is also resistant to water, grease and dust.
Compared to a capacitive touchscreen, this type of touchscreen is more accurate, especially when used with a stylus. The manufacturing cost is much lower. Resistive touchscreens are more sensitive to scratches and other damage caused by sharp objects however. They are also less reactive than the capacitive touchscreens, and their reactivity decreases over time. Lastly, resistive touchscreens are less transparent, resulting in a loss of 20 to 25% of screen brightness, and the built up layers can lead to harmful reflections.
With this technology, a layer placed on the glass face accumulates charges. When users touch the layer with their fingers, charges are transferred to them. This creates a measurable change (the electrostatic field is interrupted) on the layer, sensors then determine the coordinates of the affected area. The disadvantage of this type of technology is that it does not work when the user wears gloves.
For 'multitouch' applications, it is necessary to turn to touchscreens with projected capacitive technology. This technology works with thicker screens. This means the touchscreens can be covered by a highly resistant armoured glass screen. Capacitive touchscreens are brighter, guaranteeing a transparency of over 90%.
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Resistive touchscreens Capacitive touchscreens Advantages