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Product Overview

The Cortex®-A55 series PPC-A55-050 (PN: CS12720-RK3568-050P) is a high-quality IP65-compliant industrial panel PC. It features a 5” ten-point capacitive touch screen with a resolution of 1280 x 720 pixels and brightness of 400 cd/m2.

It is available both as an embedded solution and as a device hosed in an aluminum casing with bezels, thus facilitating different installation options:

  • Installation on an industrial cabinet

  • Integration with the existing equipment

The PPC-A55-050 Industrial Panel PC is based around the powerful RK3568 System on Chip (SoC), powered by the Rockchip RK3568 low-power processor which integrates a quad-core Cortex®-A55 processor.

The RK3568 supports multi-format video decoders and has a high-performance RAM (LPDDR4X) capable of sustaining demanding memory bandwidths. It also provides a complete set of peripheral interfaces.

Ordering Options

Chipsee products can be customized during the ordering process. The product will be shipped with the pre-installed factory defaults if no extra requirements are specified. The table in the Hardware Features section provides information about the default options bundled with the product.


You can order the PPC-A55-050 from the official Chipsee Store or from your nearest distributor.

Operating System

This product comes with a pre-installed OS of your choice. Please see the list below for the supported OSes, which can also be obtained from the Software Documentation section, along with the detailed installation instructions.

  • Debian 11

  • Android 11

  • Buildroot Linux Qt 5.15


The Software Documentation section provides a detailed instruction on how to install different OSes on your own. However, bear in mind that Chipsee can’t take the responsibility of inadequate installation procedure. If you “brick” your device, please contact Chipsee Technical Support at support@chipsee.com for further assistance


Installation, repair, and maintenance tasks should be performed by trained personnel only.
Chipsee does not bear any responsibility for damage caused by inadequate handling of the product.

Hardware Features

The PPC-A55-050 Industrial Panel PC offers a broad range of performance and connectivity options for scalable integration, providing expandability according to future needs. Some of the key features are listed in the table below.

Table 185 Key Features



Rockchip RK3568, Quad-core Cortex-A55 (2.0GHz)








TF Card, Supports up to 128GB SDHC


5” LCD, 1280 x 720, High Brightness: 400 cd/m2


1 x HDMI-D 2.0 (Micro-HDMI) Out


5-point capacitive touch screen


1 x USB 2.0 HOST, 1 x USB 3.0 HOST, 1 x USB Type-C


1 x RJ45, GbE




3.5mm Audio In/Out Connector, 2W Internal Speaker




High accuracy RTC with farad capacitor, can work 1 week after power off (default). High accuracy RTC with lithium coin battery, can work 3 years after power off (optional).


default 2 x RS232 (Optional 4 x RS232 at most, include 1 debug port)1


2 x RS485 at most1


default 1 x CAN (Optional 2 x CAN at most)




Integrated WiFi/BT Module



Power Input

From 6V to 36V


450mA Max at 12V

Power Consumption

5.4W Max

Working Temperature

From 0°C to +60°C


Android 11, Debian11, Buildroot Linux Qt 5.15


PPC-A55-050 (PN: CS12720-RK3568-050P): 138.55 x 84.70 x 27.10mm


PPC-A55-050 (PN: CS12720-RK3568-050P): 310g


PPC-A55-050 (PN: CS12720-RK3568-050P): Panel, VESA


This product has 4 x UART channels in total. The default configuration is 2 x RS232 and 2 x RS485, including 1 debug port. UART can be swapped between RS232 and RS485 modes easily, if you need a different RS232/RS485 configuration, please get in touch with the Chipsee Technical Support at support@chipsee.com

Power Input

The PPC-A55-050 Industrial Panel PC can be powered by a wide range of input voltages: From 6V to 36V DC. The power input connector is a 3-pin, 3.81mm terminal. The polarity and the pinout is clearly marked on the housing of the product as shown in the figure below.


Power Input

Note that the “+” sign represents the positive power input, it is printed at the casing and as a silk-screen on a PCB of the embedded version. The “-” terminal is shorted to the ground.

Table 186 Power Connector

Power Input Definition

Pin Number



Pin 1

Positive Input

DC Power Positive Terminal

Pin 2

Negative Input

DC Power Negative Terminal

Pin 3


Power System Ground


The system ground “G” is connected to power negative “-” on board.

Touch Screen

The PPC-A55-050 Industrial Panel PC uses a 5-point capacitive touch screen.


Figure 599: Capacitive Touch Screen Connector


A capacitive touch screen is susceptible to power noise and Electromagnetic Radiation (EMR). It may cause LCD ripples or even capacitive touch malfunction. If using a capacitive multi-touch test application, you might notice the touch points float erratically across the display. There are several solutions to this problem:

  1. Use a high-quality Power Adapter Unit (PSU) with low EMR. You can also provide power from a battery.

  2. Make sure that the PPC-A55-050 Power Input connector (pin 3) is properly connected to the Power System Ground to provide sufficient EMI shielding and eliminate the problem entirely.

  3. Bad GND problems can also be confirmed by touching pin 3 of the Power Input connector with one hand while operating the capacitive touch screen with the other hand. In this case, the operator’s body acts as the Power System Ground.


There are many connectivity options available on the PPC-A55-050 industrial PC. It has 1 x USB 2.0 HOST, 1 x USB 3.0 HOST, 1 x USB Type-C, 1 x RJ45, GbE (RJ45) Ethernet connector supporting up to 1 Gbps, and 4 x UART terminals (RS232/RS485/CAN).


The serial communication interfaces (RS485, RS232, and CAN) are routed to a 12-pin 3.81mm terminal, as illustrated on the figure below.



The table below offers more detailed description of every pin and its definition:

Table 187 Connectivity Section

RS232 / RS485 / CAN Pin Definition:

Pin Number



Pin 12


CAN H signal

Pin 11


CAN L signal

Pin 10


CPU UART4, RS485 –(B) signal

Pin 9


CPU UART4, RS485 +(A) signal

Pin 8


CPU UART3, RS485 –(B) signal

Pin 7


CPU UART3, RS485 +(A) signal

Pin 6


CPU UART0, RS232 RXD signal

Pin 5


CPU UART0, RS232 TXD signal

Pin 4


CPU UART2, RS232 RXD signal, Debug Port

Pin 3


CPU UART2, RS232 TXD signal, Debug Port

Pin 2


System Ground

Pin 1


System +5V Power Output, No more than 1A Current output


  1. RS485_3 and RS485_4 can control the input and output direction automatically. There’s no need to control it from within the software.

  2. The 120Ω match resistor for the RS485 is mounted by default.

  3. The 120Ω match resistor for the CAN bus is NOT mounted by default.

USB Connectors

There are 2 x USB HOST and 1 x USB DEVICE (for flashing OS) ports onboard: 1 x USB 2.0 HOST, 1 x USB 3.0 HOST, 1 x USB Type-C , as shown in the figures below.


USB 2.0 HOST Port (embedded / enclosed PC version)


USB 3.0 HOST Port (embedded / enclosed PC version)


USB Type-C Port (embedded / enclosed PC version)


Be careful not to touch surrounding electronic components accidentally while plugging USB devices into the embedded IPC version.

LAN Connectors

LAN (RJ45) connector provides 1 x RJ45 Ethernet connectivity over standardized Ethernet cables as shown in the figure below. The integrated Ethernet interface supports up to 1 Gbps data throughput.


RJ45 LAN Connector


Use CAT5 or better cables to achieve full data throughput over maximum distance defined by the 1000BASE-T standard (100m).

WiFi & BT Module

The PPC-A55-050 Industrial Panel PC is equipped with the popular Realtek RTL8821CS WiFi/BT module which supports BT/BLE 2.1/3.0/4.2, as well as 802.11ac/abgn 433Mbps 2.4/5.8 GHz Wireless LAN (WLAN).


Figure 600: RTL8821CS WiFi/BT Module

The PPC-A55-050 includes an SMA connector for an external WiFi/BT antenna, as illustrated in the figure below.


WiFi+BT Antenna SMA

TF Card Slot

The PPC-A55-050 Industrial Panel PC features 1 x TF Card (micro SD) slot: SD, TF slots can address up to 128GB of memory.


TF (micro SD) Card Slot

Audio Connectors

The PPC-A55-050 Industrial Panel PC features some audio peripherals. It has a 3.5mm audio input/output jack, an internal speaker, as well as a small buzzer.


Audio Connector (enclosed PC version)

The miniature 2W embedded speaker is handy for audio reproduction, the small buzzer can play alarm/notification sounds.


Figure 601: 2W Micro Speaker and Buzzer


By plugging in the headphone cable, the internal speaker will be disabled automatically.

HDMI Connector

The PPC-A55-050 Industrial Panel PC is equipped with 1 x HDMI-D 2.0 (Micro-HDMI) Out port. The HDMI connector allows connecting an additional (external) monitor. HDMI output resolution can be configured by the software.


HDMI Connector

PROG Button

The PPC-A55-050 Industrial Panel PC has one button on the board marked as PROG, as shown in the figure below.
When the button is pressed before powering up, the PPC-A55-050 will enter MASKROM mode. In this mode you can use a USB Type-C cable to upgrade its operating system. You can use this feature to flash another OS to the internal eMMC.

When the button is not pressed before and during power up, the PPC-A55-050 will boot normally.

There is no need to press the button during regular operation. However, if you need to flash the OS in MASKROM mode, the button will be used. Please refer to the software documents for more information.


PROG Button

Mounting Procedure

The PPC-A55-050 Industrial Panel PC can be mounted with 2 x M4 screws, enabling simplified installation onto any standard mounting fixture.


You can mount PPC-A55-050 with the Vesa (75 x 75mm) and Panel mounting methods, as shown on the figure below.


Figure 602: Panel mounting


Please make sure the display is not exposed to high pressure when mounting into an enclosure.

You can find detailed information about mounting in the Mount IPC Guide.

Mechanical Specifications


The outer mechanical dimensions of PPC-A55-050 are 138.55 x 84.70 x 27.10mm (W x L x H). Please refer to the technical drawing in the figure below for details related to the specific product measurements.


Figure 603: PPC-A55-050 Technical Drawing

3D Model

PPC-A55-050 3D model can be viewed in the online doc in a web browser, if you are reading from the PDF version, please visit the online doc PPC-A55-050, select hardware documentation, drag the navigation bar to the 3D Model section.


This document is provided strictly for informational purposes. Its contents are subject to change without notice. Chipsee assumes no responsibility for any errors that may occur in this document. Furthermore, Chipsee reserves the right to alter the hardware, software, and/or specifications set forth herein at any time without prior notice and undertakes no obligation to update the information contained in this document.

While every effort has been made to ensure the accuracy of the information contained herein, this document is not guaranteed to be error-free. Further, it does not offer any warranties or conditions, whether expressed orally or implied in law, including implied warranties and conditions of merchantability or fitness for a particular purpose. We specifically disclaim any liability with respect to this document, and no contractual obligations are formed either directly or indirectly by this document.

Despite our best efforts to maintain the accuracy of the information in this document, we assume no responsibility for errors or omissions, nor for damages resulting from the use of the information herein. Please note that Chipsee products are not authorized for use as critical components in life support devices or systems.

Technical Support

If you encounter any difficulties or have questions related to this document, we encourage you to refer to our other documentation for potential solutions. If you cannot find the solution you’re looking for, feel free to contact us. Please email Chipsee Technical Support at support@chipsee.com, providing all relevant information. We value your queries and suggestions and are committed to providing you with the assistance you require.