1 Hardware Manual

This chapter introduces the product overview, packing list, appearance, button and interface.

1.1 Overview

ED-HMI2320-156C is a 15.6-inch industrial HMI based on Raspberry Pi CM4. According to different application scenarios and user needs, different specifications of RAM and eMMC computer systems can be selected.

  • RAM can choose 1GB, 2GB, 4GB and 8GB.
  • eMMC can choose 8GB, 16GB and 32GB.

ED-HMI2630-101C provides common interfaces such as HDMI, USB, Ethernet, RS232, RS485, MIC IN and LINE OUT, and supports network access through Wi-Fi, Ethernet and 4G. It supports Micro SD Card and mSATA SSD storage expansion; integrated RTC, EEPROM and encryption chip, which enhances the ease of use and reliability of the product. It is mainly used in the field of industrial control and IOT.

1.2 Packing List

  • 1 x ED-HMI2320-156c Unit
  • [Optional] 1 x ED-ACC-DMB2320 (desktop installation base, with 6 M4 screws)
  • [Optional Wi-Fi/BT version] 1 x 2.4GHz/5GHz Wi-Fi/BT antenna
  • [Optional 4G version] 1 x 4G/LTE antenna

1.3 Appearance

Introducing the functions and definitions of interfaces on each panel.

1.3.1 Front Panel

This section introduces functions and definitions of front panel.

NO.Function Definition
11 x LCD display, 15.6-inch LCD touch screen, which supports up to 1920x1080 and multi-point capacitive touchscreen.

1.3.2 Rear Panel

This section introduces interfaces and definitions of rear panel.

NO.Function Definition
110 x base installing holes. When installing the device, it is used to install the device desktop base,.
29 x Case installing holes, When closing the device case, it is used to fix the device case.

1.3.3 Side Panel

This section introduces interfaces and definitions of side panel.

NO.Function Definition
12 x SMA ports for connecting 4G and Wi-Fi/BT antennas (optional).
23 x RS485/232, DB9 male terminal, can be configured into different numbers of RS232 and RS485 interfaces according to actual needs. The RS232 interface uses pins 2, 3 and 5 of the terminal, and the single signal is defined as RX/TX/GND. The RS485 interface uses pins 1 and 2 of the terminal, and the single signal is defined as A/B.
  • RS485 quantity: 0~2
  • RS232 quantity: 1~3
31 x Ethernet interface (0/100/1000M adaptive), RJ45 terminal, for accessing Ethernet; PoE power supply can be supported through optional expansion modules, with a maximum PoE power of 60W, compatible with IEEE 802.3bt standard.
41 x RS232, DB9 male terminal, using pins 2, 3 and 5 of the terminal, the corresponding signals are defined as RX/TX/GND, single-board debugging serial port, which is used for single-board debugging.
51 x HDMI, type-A connector, which is compatible with HDMI 2.0 standard. Resolution supports 4K 60Hz.
61 x DC input, DC Jack connector (optional 2-Pin 3.5mm pitch Phoenix terminal), with overcurrent, overvoltage and reverse polarity protection, supporting 9V~36V input.
71 x Power button, including short press and long press operations.
When it is not powered on:
  • Short press: Start up the device
  • Long press: Enter flashing to eMMC mode
After it is powered on:
  • Short press: Null
  • Long press: Shut down the device forcibly
82 x USB 3.0, double-layer type-A connector, each channel supports up to 5Gbps transmission rate.
92 x USB 2.0, double-layer type-A connector, each channel supports up to 480Mbps transmission rate.
101 x LINE output, green 3.5mm audio interface, stereo output.
111 x MIC input, red 3.5mm audio interface, supports microphone input.

1.4 Button

The ED-HMI2320-156c device includes a button. Short press and long press correspond to different operations. When the device is not powered on, short press the button to boot the device; long press to enter the eMMC flashing mode, in which the image can be flashed to the device. when the device is powered on, short press the button is invalid, long press the button will force the device to shut down.

1.5 Interface

1.5.1 Power Supply Interface

The ED-HMI2320-156c device includes 1 power input, DC Jack connector (optional 2-pin 3.5mm pitch Phoenix terminal), supports 9V~36V input, the interface silk screen is "DC12V", and the pin definition is as follows.

image-20240702161949607.pngPin IDPin Name
19V~36V
2GND

1.5.2 HDMI Interface

The ED-HMI2320-156c device includes one HDMI interface, a standard type-A connector, and the interface silkscreen is "HDMI". It supports connecting to an HDMI display and supports up to 4Kp60 video output.

1.5.3 COM Interface (COM0)

The ED-HMI2320-156c device includes one COM0 interface with a DB9 male terminal. By default, it is the debugging serial port of the board and is used for device debugging.

Pin Definition

The terminal pins are defined as follows:

image-20240702165814722.pngPin IDPin Name
1NC
2DB9_RS232_RX
3DB9_RS232_TX
4NC
5GND
6~9NC

The pin names of the RS232 interface corresponding to CM4 are as follows:

SignalCM4 GPIO NameCM4 Pin Out
DB9_RS232_RXGPIO15CM4_UART_RXD0
DB9_RS232_TXGPIO14CM4_UART_TXD0

1.5.4 COM Interface (COM1~COM3)

The ED-HMI2320-156c device includes 3 COM ports (COM1~COM3), which can be expanded to 0~2 RS485 ports and 1~3 RS232 ports according to actual user needs.

3 x RS232 without RS485

The pin names of CM4 corresponding to RS232 are as follows:

COM口SignalCM4 GPIO NameCM4/SPI Pin Out
COM1COM1_RS232_RXGPIO1CM4_UART_RXD2
COM1_RS232_TXGPIO0CM4_UART_TXD2
COM2COM2_RS232_RXGPIO5CM4_UART_RXD3
COM2_RS232_TXGPIO4CM4_UART_TXD3
COM3COM3_RS232_RX-SPI_UART_RXD1
COM3_RS232_TX-SPI_UART_TXD1

2 x RS232 and 1 x RS485

The pin names of CM4 corresponding to RS232 and Rs485 are as follows:

COM口SignalCM4 GPIO NameCM4 Pin Out
COM1COM1_RS232_RXGPIO1CM4_UART_RXD2
COM1_RS232_TXGPIO0CM4_UART_TXD2
COM2COM2_RS232_RXGPIO5CM4_UART_RXD3
COM2_RS232_TXGPIO4CM4_UART_TXD3
COM3RS485_1_AGPIO12CM4_UART5_TXD
RS485_1_BGPIO13CM4_UART5_RXD

1 x RS232 and 2 x RS485

The pin names of CM4 corresponding to RS232 and Rs485 are as follows:

COM口SignalCM4 GPIO NameCM4 Pin Out
COM1COM1_RS232_RXGPIO1CM4_UART_RXD2
COM1_RS232_TXGPIO0CM4_UART_TXD2
COM2RS485_1_AGPIO12CM4_UART5_TXD
RS485_1_BGPIO13CM4_UART5_RXD
COM3RS485_2_AGPIO8CM4_UART4_TXD
RS485_2_BGPIO9CM4_UART4_RXD

1.5.4.1 RS232 Interface

ED-HMI2320-156C device includes 1~3 RS232 ports, with DB9 male terminals. The RS232 interface uses pins 2, 3, and 5 of the terminal, and the single-channel signal is defined as RX/TX/GND.

RS232_1 Pin Definition

The terminal pins are defined as follows:

image-20240702165814722.pngPin IDPin Name
1NC
2COM1_RS232_RX
3COM1_RS232_TX
4NC
5GND
6~9NC

RS232_2 Pin Definition

The terminal pins are defined as follows:

image-20240702165814722.pngPin IDPin Name
1NC
2COM2_RS232_RX
3COM2_RS232_TX
4NC
5GND
6~9NC

RS232_3 Pin Definition

The terminal pins are defined as follows:

image-20240702165814722.pngPin IDPin Name
1NC
2COM3_RS232_RX
3COM3_RS232_TX
4NC
5GND
6~9NC

Connecting cables

The wiring diagram of the RS232 serial port is as follows:

1.5.4.2 RS485 Interface

The ED-HMI2320-156c device includes 0~2 RS485 ports with DB9 male terminal. The RS485 interface uses pins 1 and 2 of the terminal, and the single signal is defined as A/B.

RS485_1 Pin Definition

The terminal pins are defined as follows:

image-20240702165814722.pngPin IDPin Name
1RS485_1_B
2RS485_1_A
3GND
4NC
5NC
6~9NC

RS485_2 Pin Definition

The terminal pins are defined as follows:

image-20240702165814722.pngPin IDPin Name
1RS485_2_B
2RS485_2_A
3GND
4NC
5NC
6~9NC

Connecting cables

The wiring diagram of the RS485 serial port is as follows:

1.5.5 USB 3.0 Interface

The ED-HMI2320-156c device includes two USB 3.0 interfaces with double-layer standard type-A connectors. It supports connecting standard USB 3.0 peripherals and supports up to 5Gbps.

1.5.6 USB 2.0 Interface

The ED-HMI2320-156c device includes two USB 2.0 interfaces with double-layer standard type-A connectors. It supports connecting standard USB 2.0 peripherals and supports up to 480Mbps.

1.5.7 1000M Ethernet Interface (ETH0)

The ED-HMI2320-156c device includes one adaptive 10/100/1000M Ethernet interface, the interface silkscreen is "LAN", using RJ45 terminals, and can support PoE power supply when used with expansion modules. It is recommended to use a Cat6 or higher specification network cable when connected to Ethernet.

1.5.8 LINE OUT Interface

The ED-HMI2320-156c device includes 1 audio output interface, the interface silkscreen is "", uses a green 3.5mm audio connector and supports stereo output.

1.5.9 MIC IN Interface

The ED-HMI2320-156c device includes 1 MIC input interface, the interface silkscreen is "", uses a red 3.5mm audio connector and supports microphone input.

1.5.10 Antenna interface (optional)

The ED-HMI2320-156c device includes up to 2 SMA antenna interfaces, corresponding to the 4G antenna and Wi-Fi/BT antenna.