Version 1.0

Product Overview

The Cortex®-A72/53 series PPC-A72-125-C (PN: CS19108R125) is a high-quality industrial panel PC. It features a 12.5” ten-point capacitive touch screen with a resolution of 1920 x 1080 pixels and brightness of 250 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-A72-125-C Industrial Panel PC is based around the powerful CS-SOM-RK3399 System on Module (SoM), powered by the Rokchip RK3399 low-power processor which integrates a dual-core Cortex®-A72 and a quad-core Cortex®-A53 with a separate NEON coprocessor.

The RK3399 supports multi-format video decoders and has a high-performance dual-channel external memory interface (DDR3/DDR3L/LPDDR3/LPDDR4) 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-A72-125-C Industrial Panel PC 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 be also obtained from the Software Documentation section, along with the detailed installation instructions.

  • Chipsee Linux*

  • Android 7.1

  • Debian 10


Chipsee Linux is based on buildroot that has been integrated with:

  1. Chipsee Hardware Test Application

  2. An initialization script for GPIO/Buzzer/Audio

  3. Multiple libraries, such as the libQt5Sql to develop Qt application with SQL

  4. Various packages, such as the ntfs-3g to use NTFS file system


The Software Documentation section provides a detailed instruction how to install different OS 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 service@chipsee.com for further assistance

Optional Features

The PPC-A72-125-C Industrial Panel PC does not include 4G/LTE module by default. The module is optional and can be selected at the Chipsee store during the ordering process.


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-A72-125-C Industrial Panel PC offers a board 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 91 Key Features



Rokchip RK3399, Dual-core Cortex-A72 (1.8GHz), Quad-core Cortex-A53 (1.4GHz)






TF Card, Supports up to 32GB SDHC


12.5” LCD, 1920 x 1080, High Brightness: 250 cd/m2


10-point capacitive touch screen


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


1 x RJ45, GbE


3.5mm Audio Out Connector, 2W Internal Speaker






5 x RS2321


2 x RS485 ( 4 at most, 1 debug port)1


8 Channels


Integrated WiFi/BT Module


1 x HDMI


Supported, Optional

Power Input

From 15V to 36V

Current at 15V

800mA Max

Power Consumption

12W Typical

Working Temperature

From 0°C to +70°C


Android 7.1


306 x 187 x 37mm




VESA & Panel methods


This product has 7 x UART channels in total. The default configuration is 5 x RS232 and 2 x RS485. UART can be swapped between RS232 and RS485 modes easily, so if you need different RS232/RS485 configuration, please get in touch with the Chipsee Technical Support at service@chipsee.com

Power Input

The PPC-A72-125-C Industrial Panel PC can be powered by a wide range of input voltages: From 15V 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 on the figure below.


Figure 447: Power Input

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

Table 92 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-A72-125-C Industrial Panel PC uses a 10-point capacitive touch screen.


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-A72-125-C 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 problem 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-A72-125-C industrial PC. It has 4 x USB 2.0 HOST, 1 x USB 3.0 HOST, 1 x USB Type-C, 1 x RJ45, GbE Ethernet connector, and 6 x DB9 connectors.

DB9 Connectors

The PPC-A72-125-C Industrial Panel PC has 6 x DB9 connectors that are configured as RS232 by default as shown on the figure below. You can configure COM3/COM4/COM5/COM6 as RS485. If you need different RS232/RS485 configuration, contact the Chipsee Technical Support at service@chipsee.com.


Figure 448: DB9 Connectors

USB Connectors

There are 4 x dual USB 2.0 HOST connectors onboard, as shown on the figure below.


Figure 449: USB 2.0 HOST Connectors

There is also 1 x USB 3.0 HOST connector and 1 x USB Type-C connector, as shown below.


Figure 450: USB 3.0 HOST Connector


Figure 451: USB Type-C Connector

LAN Connectors

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


Figure 452: 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-A72-125-C Industrial Panel PC is equipped with the popular Realtek RTL8723 WiFi/BT module that supports BT/BLE 4.0 (with backward compatibility), as well as 802.11bgn 2.4 GHz Wireless LAN (WLAN).

The product includes an SMA connector for an external WiFi/BT antenna, as illustrated in the figure below.


Figure 453: WiFi+BT Antenna

4G/LTE Module

The PPC-A72-125-C Industrial Panel PC is equipped with a mini-PCIe connector that can connect to a 4G/LTE module. The customer will also need a SIM Card Holder and a 4G/LTE Antenna Connector to ensure 4G/LTE works on the PPC-A72-125-C.


Figure 454: SIM Card Holder


The product does not come shipped with the 4G/LTE module by default.

Expansion Connector

The PPC-A72-125-C Industrial Panel PC has 1 x Expansion Connector (closed by default), as shown on the figure below. This connector has connected to isolated GPIO signals.
The table below gives details about the definition of every Pin.


Figure 455: Expansion Connector

Table 93 Expansion Connector Pinout

Expansion Connector Pinout






VDD, Isolated Power Input (+5V – +24V)




















Since the PCB traces of the port are connected to the processor directly, be careful not to cause electrostatic discharge or over voltage on the pins, as it may damage the processor. Take all the necessary precautions while working with electrostatic-sensitive equipment.

TF Card Slot

The PPC-A72-125-C Industrial Panel PC features 1 x TF Card (micro SD) slot. It can address up to 32GB of memory.


Figure 456: TF (micro SD) Card Slot


The product does not come shipped with the TF Card by default.

Audio Connectors

The PPC-A72-125-C Industrial Panel PC features some audio peripherals, as well. It has 1 x 3.5mm audio output jack.


Figure 457: Audio Out Connector

HDMI Connector

The PPC-A72-125-C Industrial Panel PC is equipped with 1 x HDMI connector. The HDMI connector allows connecting an additional (external) monitor. HDMI output resolution can be configured by the software.


Figure 458: HDMI Connector

Power Button

The PPC-A72-125-C Industrial Panel PC has a power button, as shown on the figure below. You can use the button to power ON or OFF the industrial PC.


Figure 459: Power button

Measurements and Mounting Procedure

The outer mechanical dimensions of PPC-A72-125-C are 306 x 187 x 37mm (W x L x H).

The PPC-A72-125-C Industrial Panel PC can be mounted with 8 x M4 screws or 4 x M4 screws using the VESA (100x100cm or 75x75cm) and Panel mounting methods, enabling simplified installation onto any standard mounting fixture.


Figure 460: Mounting Method


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.

Technical Support

Please feel free to contact us with any questions, queries or suggestions.

If your question is related to technical support or troubleshooting for one of our products, we kindly ask you to check our documentation for a possible solution first.

If you still cannot find the solution you are looking for, please write to Chipsee Technical Support at service@chipsee.com, providing all relevant information.



Chipsee assumes no responsibility for any errors that may occur in this manual. Furthermore, Chipsee reserves the right to alter 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. Chipsee products are not authorized for use as critical components in life support devices or systems.