Start With the Panel Opening
The panel opening in the machine cabinet is the first hard limit. Every panel in this range is mounted from the front and held by clamps from behind, so the published cut-out and the panel body depth decide whether a model can be fitted at all.
A 4.3 inch panel needs roughly a 12 x 9 cm opening, a 7 inch panel around 19 x 14 cm, and a 15.6 inch panel around 40 x 25 cm. Measure the existing opening rather than the old panel front, because the front bezel is always larger than the opening.
Depth matters as much as width and height. Cabinets with a shallow door, a hinged enclosure or an existing terminal block behind the panel leave less room than the cut-out suggests. Compare the published panel body depth before ordering.
Match the Display Size to the Operator Position
Panel size is a reading-distance decision. A 4.3 or 7 inch panel suits an operator standing directly at the machine, where the screen shows setpoints, a recipe and a few status fields. A 10.1 or 10.4 inch panel is the common choice for a machine HMI that also shows a trend, an alarm list and a small process diagram.
From 12.1 inch upwards the panel is usually read from a step or two away, or by more than one person at a time. The 15.6 inch size at 1920 x 1080 is the only size in this range that can show a dense process picture and a trend side by side without scrolling.
Resolution matters independently of size. A 7 inch panel published at 1024 x 600 shows the same number of pixels as a 10.1 inch panel at the same resolution, which means the same screen layout works on both — but the smaller panel has noticeably smaller text. Check the resolution of the project screen before choosing the diagonal.
Choose the Port Set Before the Processor
The port set decides whether the panel can talk to the machine at all. The published interfaces in this range are:
- Serial ports in combinations of RS232, RS485 and RS422 across two to four COM channels, depending on the model.
- One or two Ethernet ports, used for a PLC connection, a network printer or a project download.
- USB host and USB slave ports for project transfer and a USB stick.
- Optional Wi-Fi, 4G and CANopen interfaces on the model codes whose name carries the matching suffix.
Write down every protocol and connector the cabinet already uses before comparing models. A machine that runs a frequency converter on RS485, a barcode reader on RS232 and a plant network on Ethernet needs three separate connections, and not every panel in the range provides them.
Check the Touch Type and Front Protection
Every panel in the Basic, Standard and Advanced series is published with a 4-wire resistive touch panel. Resistive touch works through gloves and with a stylus, which is why it stays common on machine panels. Capacitive and optically bonded fronts sit in other product families, so a project that requires them is not covered by these three series.
Front protection is published as IP65 on the panels in this range. That protects the front face against dust and water spray when the panel is correctly mounted with its gasket against the cabinet surface. The protection applies to the mounted front, not to the rear of the panel inside the cabinet.
Confirm the Variant Code and the Program
The same display size and resolution often appears under several model codes that differ only in interface options, memory, panel depth or certification. A page that lists one size can therefore cover a handful of model codes, and the differences are listed next to each one.
Before ordering, confirm three things: the exact model code that matches the cabinet, the configuration software the existing project was built in, and the protocol the machine program expects. Where a project was built for a different code, the screen file usually still opens, but the port assignment and the panel parameters have to be checked against the new hardware.
Send the existing panel label, the measured opening and photos of the cabinet wiring with the request. That combination is enough to confirm the model, the variant code and the accessories in one step.
