1 Hardware Manual

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

1.1 Overview

ED-HMI2120-101C is a 10.1-inch high reliability 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.

  • Options for 1GB, 2GB, 4GB and 8GB RAM
  • Options for 8GB, 16GB and 32GB eMMC storage

ED-HMI2120-101C provides common interfaces such as HDMI, USB 2.0, RS232, RS485, audio and Ethernet, and supports access to the network through Wi-Fi, Ethernet and 4G. ED-HMI2120-101C integrates supercapacitor (backup power supply, which is optional), RTC, Watch Dog, EEPROM and encryption chip, improving the ease of use and reliability of the product. It is mainly used in industrial control and IOT.

image-20240628112501004image-20240628112518696

1.2 Packing List

  • 1x ED-HMI2120-101C Unit
  • 1 x Mounting Kit (including 4 x buckles, 4xM410 screws and 4xM416 screws)
  • [optional Wi-Fi/BT version] 1x 2.4GHz/5GHz Wi-Fi/BT Antenna
  • [optional 4G version] 1x 4G/LTE Antenna

1.3 Appearance

Introducing the functions and definitions of interfaces on each panel.

1.3.1 Front Panel

Introducing the front panel interface types and definitions.

image-20240628112647740
NO.Function Definition
11 x LCD display, 10.1-inch LCD touch screen, which supports up to 1280x800 resolution and multi-point capacitive touchscreen.
21 x camera (optional), 8-megapixel front camera.

1.3.2 Rear Panel

Introducing the types and definitions of the rear panel interface.

image-20240628114403545
NO.Function Definition
15 x installation holes of buckle, which are used to fix the buckles to the device for installation. You only need to use 4 installation holes during installation, and reserve one as a spare.

1.3.3 Side Panel

Introducing the types and definitions of side panel interfaces.

image-20240628114559539
NO.Function Definition
11 x green user indicator, user can customize a status according to actual application.
21 x green system status indicator, which is used to check the working status of device.
31 x red power indicator, which is used to check the status of device power-on and power-off.
41 x green 4G indicator, which is used to check the status of 4G signal.
54 x green UART indicators, using to check the communication status of UART port.
61 x DC input, 2-Pin 3.5mm pitch phoenix terminals with screw holes.
It supports 9V~36V input, the signal is defined as VIN+/GND.
71 x Audio input/Stereo output, 3.5mm audio jack connector. It can be used as MIC IN and LINE OUT.
  • When a headphone is connected, the audio output is switched to the headphone.
  • When a headphone is not connected, the audio output is switched to the speaker.
82 x RS232 ports, 6-Pin 3.5mm pitch phoenix terminals, which is used to connect third-party control equipment.
92 x RS485 ports, 6-Pin 3.5mm pitch phoenix terminal, which is used to connect the third-party control equipment.
101 x 10/100/1000M adaptive ethernet port, RJ45 connector, with led indicator. It can be used to access the network.
111 x 10/100M adaptive ethernet port, RJ45 connector, with led indicator. It can be used to access the network.
121 x HDMI port, type A connector, which is compatible with HDMI 2.1 standard and supports 4K 60Hz. It supports to connect a displayer.
132 x USB 2.0 ports, type A connector, each channel supports up to 480Mbps transmission rate.
141 x Reset button, pressing the button will reset the device.
151 x Wi-Fi/BT antenna port, SMA connector, which can connect to Wi-Fi/BT antenna.
161 x 4G antenna port, SMA connector, which can connect to 4G antenna.
171 x Micro USB port, which supports to flash to eMMC for the system.
181 x Nano SIM slot, which is used to install a SIM card for getting 4G signal.
191 x Micro-SD card slot, which is used to install SD card for storing user data.

1.4 Button

ED-HMI2120-101C includes a RESET button, which is a hidden button, and the silkscreen on the case is "RESET". Pressing the RESET button will reset the device.

1.5 Indicator

Introducing the various statuses and meanings of indicators contained in ED-HMI2120-101C.

IndicatorStatusDescription
PWROnThe device has been powered on.
BlinkPower supply of the device is abnormal, please stop the power supply immediately.
OffThe device is not powered on.
ACTBlinkThe system started successfully and is reading and writing data.
OffThe device is not powered on or does not read and write data.
USEROnUser can customize a status according to actual application.
OffThe device is not powered on or not defined by the user, and the default status is off.
4GOnThe dial-up is successful and the connection is normal.
Off4G signal is not connected or the device is not powered on.
Yellow indicatorof Ethernet portOnThe data transmission is abnormal.
BlinkData is being transmitted over the Ethernet port.
OffThe Ethernet connection is not set up.
Green indicatorof Ethernet portOnThe Ethernet connection is in the normal state.
BlinkThe Ethernet connection is abnormal.
OffThe Ethernet connection is not set up.
COM1~COM4On/BlinkData is being transmitted.
OffThe device is not powered on or there is no data transmission.

1.6 Interface

Introducing the definition and function of each interface in the product.

1.6.1 Card Slot

ED-HMI2120-101C includes an SD card slot and a Nano SIM card slot.

1.6.1.1 SD Card Slot

The silkscreen on the case of Micro SD card slot is "image", which is used to install SD card for storing user data.

1.6.1.2 SIM Card Slot

The silkscreen on the case of Nano SIM card slot is "image", which is used to install SIM card for obtaining 4G signals.

1.6.2 Power Supply Interface

The ED-HMI2120-101C includes one power input, 2-Pin 3.5mm pitch phoenix terminals with screw holes. The silkscreen of port is "VIN+/GND", and the pins are defined as follows.

image-20240531093735488.pngPin IDPin Name
1GND
29V~36V

1.6.3 Audio Interface

ED-HMI2120-101C includes one audio input, the connector is a 3.5mm 4-pole headphone jack. The silkscreen of port is "image", which supports OMTP stereo headphone output and mono microphone recording.

  • When the headphone is connected, the audio output is switched to the headphone.
  • When the headphone is not connected, the audio output is switched to the speaker.

1.6.4 Speaker

The ED-HMI2120-101C contains a power amplifier output, built-in a 4Ω 3W speaker, supporting single-channel stereo output. When playing audio, if the headphone is connected to the Audio interface, the speaker will have no audio output.

1.6.5 RS232 Interface

ED-HMI2120-101C include 2 RS232 ports, 6-Pin 3.5mm pitch phoenix terminals. The silkscreen of single RS232 is “IGND/TX/RX”.

Pin Definition

Terminal pins are defined as follows:

image-20240628115613489.pngPin IDPin Name
1GND
2GND
3RS232-1_TX
4RS232-3_TX
5RS232-1_RX
6RS232-3_RX

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

SignalCM4 GPIO NameCM4 Pin Out
RS232-1_TXGPIO4UART3_TXD
RS232-3_TXGPIO0UART2_TXD
RS232-1_RXGPIO5UART3_RXD
RS232-3_RXGPIO1UART2_RXD

Connecting Cables

Schematic diagram of RS232 wires is as follows:

img

1.6.6 RS485

ED-HMI2120-101C include 2 RS485 ports, 6-Pin 3.5mm pitch phoenix terminals. The silkscreen of single RS485 is “IGND/A/B”.

Pin Definition

Terminal pins are defined as follows:

image-20240628134746828.pngPin IDPin Name
1GND
2GND
3RS485-2_A
4RS485-4_A
5RS485-2_B
6RS485-4_B

The pin names of CM4 corresponding to RS485 interface are as follows:

SignalCM4 GPIO NameCM4 Pin Out
RS485-2_AGPIO12UART5_TXD
RS485-4_AGPIO8UART4_TXD
RS485-2_BGPIO13UART5_RXD
RS485-4_BGPIO9UART4_RXD

Connecting Cables

Schematic diagram of RS485 wires is as follows:

img

RS485 terminal resistance configuration

ED-HMI2120-101C contain 2 RS485 ports. A 120R jumper resistor is reserved between A and B of RS485 line. The jumper cap can be inserted to enable the jumper resistor. By default, the jumper cap is not connected, and the 120R jumper resistor function is disabled. The position of jumper resistor in the PCBA are J24 and J22 in the figure below (red box position).

image-20240628134924186

The relationship between the RS485 ports and corresponding COM ports are shown in the table below.

Location in PCBACorresponding COM portThe specific location of the corresponding COM
J24COM4image-20240626181346082.png
J22COM2

TIP

You need to open the device case to view the position of 120R jumper resistor. For detailed operations, please refer to 2.1.1 Open Device Case.

1.6.7 1000M Ethernet Interface

ED-HMI2120-101C includes one adaptive 10/100/1000M Ethernet port, and the silkscreen is "image-20240626182045724". The connector is RJ45, which can support PoE with the expansion module. When accessing to network, it is recommended to use the network cable of Cat6 and above. The pins corresponding to the terminal are defined as follows:

image-20240531160121803.pngPin IDPin Name
1TX1+
2TX1-
3TX2+
4TX2-
5TX3+
6TX3-
7TX4+
8TX4-

1.6.8 100M Ethernet Interface

ED-HMI2120-101C includes includes an adaptive 10/100M Ethernet port, and the silkscreen is "image-20240626182226059". The connector is RJ45, and it is recommended to use the network cable with Cat6 and above when accessing to network. The pins corresponding to the terminal are defined as follows:

image-20240531160121803.pngPin IDPin Name
1TX+
2TX-
3Rx+
4-
5-
6RX-
7-
8-

1.6.9 HDMI Interface

ED-HMI2120-101C includes one HDMI port, the silkscreen is "HDMI". The connector is type A HDMI, which can connect to an HDMI display and supports up to 4Kp60.

1.6.10 USB 2.0 Interface

ED-HMI2120-101C includes 2 USB2.0 ports, the silkscreen is "image". The connector is type A USB, which can connect to standard USB 2.0 peripherals and supports up to 480Mbps transmission rate.

1.6.11 Micro USB Interface

ED-HMI2120-101C includes one Micro USB interface, the silkscreen is "PROGRAMMING" and it can be connected to a PC to flash to eMMC of the device.

1.6.12 Antenna Interface (optional)

The ED-HMI2120-101C includes 2 SMA antenna ports, the silkscreens are "4G" and "Wi-Fi/BT" and they can be connected to the 4G antenna and Wi-Fi/BT antenna.

TIP

The number of antenna interface is related to the purchasing product model. Here, we take two antenna interfaces as an example.

1.6.13 Motherboard Interface

Introducing the interfaces reserved in the ED-HMI2120-101C, which can be obtained only after the device case is opened and can be expanded according to actual needs.

image-20240628135225311
NO.Function
112V 1A Power Output
210-Pin GPIO Pin Header
340-Pin GPIO Pin Header
4M.2 B
5RTC Battery Base
6USB 2.0 Pin Header
7CSI Interface
8FPC HDMI Interface

1.6.13.1 12V 1A Output

The motherboard of ED-HMI2120-101C includes 3 expanded 12V 1A power output ports with 2-Pin 2.0mm white WTB connector, which is reserved for the extended LCD screen to supply power. The pins are defined as follows:

image-20240531104203399.pngPin IDPin Name
1GND
212V

1.6.13.2 10-Pin GPIO

The motherboard of ED-HMI2120-101C includes a 10-Pin GPIO Pin Header with 2x5-Pin 2.54mm pitch, which is used to lead out the extended GPIO port. The user can customize the extension, and the pins definition are as follows:

image-20240531104050826.pngPin IDPin Name
1EXIO_P10
23V3
3EXIO_P12
4EXIO_P11
5EXIO_P14
6EXIO_P13
7EXIO_P16
8EXIO_P15
9GND
10EXIO_P17

1.6.13.3 40-Pin GPIO

The motherboard of ED-HMI2120-101C includes a 40-Pin GPIO terminal with 2x20-Pin 2.54mm pitch, which is used to lead out the GPIO port of CM4, and reserves to connect the extended accessories. The pins are defined as follows:

image-20240531104903881.pngPin IDPin NamePin IDPin Name
13V3_EXT25V2_CM4
3GPIO245V2_CM4
5GPIO36GND
7GPIO48GPIO14
9GND10GPIO15
11GPIO1712GPIO18
13GPIO2714GND
15GPIO2216GPIO23
173V3_EXT18GPIO24
19GPIO1020GND
21GPIO922GPIO25
23GPIO1124GPIO8
25GND26GPIO7
27GPIO028GPIO1
29GPIO530GND
31GPIO632GPIO12
33GPIO1334GND
35GPIO1936GPIO16
37GPIO2638GPIO20
39GND40GPIO21
Note:GPIO4~GPIO9、GPIO12、GPIO13 and GPIO22~GPIO27 has been used for other specific functions. If you need to use the function of its ordinary IO, you need to remove the jumper resistance on the corresponding signal line.

1.6.13.4 M.2 B Interface

The motherboard of ED-HMI2120-101C includes a M.2 B Key connector, which is used for external SSD. It is compatible with M.2 B 2230 and M.2 B 2242 SSD.

1.6.13.5 RTC Battery Base

The motherboard of ED-HMI2120-101C is integrated with RTC. For the version sold in China, we will install CR1220 battery (RTC backup power supply) by default.

image

RTC can ensure that the system has an uninterrupted and reliable clock, which is not affected by factors such as the device is power down.

TIP

Some international logistics do not support the transportation of batteries, and some ex-factory devices are not equipped with CR1220 batteries. Therefore, before using RTC, please prepare a CR1220 battery and install it on the motherboard.

1.6.13.6 USB 2.0 Interface

The motherboard of ED-HMI2120-101C includes an extended USB 2.0 Pin Header with 5-Pin 1.5mm pitch WTB connector. It is used to expand a USB 2.0 interface, the pins are defined as follows:

image-20240531140346830.pngPin IDPin Name
1VBUS
2USB_DM
3USB_DP
4GND
5GND

1.6.13.7 CSI Interface

The motherboard of ED-HMI2120-101C includes one extended CSI interface, 2x15-Pin 0.4mm pitch connector and 2-Lane CSI signal. It is used to expand the connection of 8-megapixels CSI camera, the pins are defined as follows:

image-20240531141333842.pngPin IDPin NamePin IDPin Name
1NC2NC
31V8_CM441V2_CSI
51V8_CM46GND
7CSI_MCLK8GND
9GND102V8_CSI
11NC12NC
13NC14NC
15GND16GND
17NC18NC
19GND20CSI_D1_N
21CSI_D1_P22GND
23CSI_D0_N24CSI_D0_P
25GND26CSI_CLK_N
27CSI_CLK_P28GND
29SCL_1V830SDA_1V8

1.6.13.8 FPC HDMI Interface

The motherboard of ED-HMI2120-101C includes one extended HDMI interface with 40-pin 0.5mm pitch FPC connector. It supports video signal output to LCD screen, reserves to connect the extended LCD screen. It supports USB/I2C touch screen and backlight adjustment The pins are defined as follows:

image-20240531141545769.pngPin IDPin NamePin IDPin Name
1NC2NC
3NC4NC
5NC6NC
7NC8GND
9HDMI1_CLKN10HDMI1_CLKP
11GND12GND
13HDMI1_TX0N14HDMI1_TX0P
15GND16GND
17HDMI1_TX1N18HDMI1_TX1P
19GND20GND
21HDMI1_TX2N22HDMI1_TX2P
23GND24GND
25HDMI1_CEC26GND
27HDMI1_SCL28HDMI1_SDA
29GND30HDMI1_HPD
31GND32TPINT_L
33GND34SDA_LCD
35SCL_LCD36GND
37GND38USB_DP_LCD
39USB_DM_LCD40GND