1 Hardware Manual

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

1.1 Overview

ED-HMI3120-156C is a 15.6-inch industrial HMI based on Raspberry Pi CM5. According to different application scenarios and user needs, different specifications of RAM and eMMC computer systems can be selected.

Options for 2GB, 4GB, 8GB and 16GB RAM
Options for 16GB, 32GB and 64GB eMMC storage

ED-HMI3120-156C 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-HMI3120-156C 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.

1.2 Packing List

1x ED-HMI3120-156C Unit
1 x Mounting Kit (including 4 x buckles, 4xM4*10 screws and 4xM4*16 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.

NO.	Function Definition
1	1 x LCD screen, 15.6-inch touch screen with a resolution of 1920x1080, multi-touch capacitive touch screen.

1.3.2 Rear Panel

Introducing the types and definitions of the rear panel interface.

NO.	Function Definition
1	4 x installation holes of snap, which are used to fix the snaps to the device for Embedded installation.
2	4 x VESA mounting holes, reserved for VESA bracket installation.
3	1 x Speaker, built-in one 4Ω 5W speaker, single-channel stereo audio output.

1.3.3 Side Panel

Introducing the types and definitions of side panel interfaces.

NO.	Function Definition
1	1 x Micro SD card slot, which is used to install Micro SD card for storing user data.
2	1 x Nano SIM slot, which is used to install a Nano SIM card for getting 4G signal.
3	1 x Micro USB port, which supports to flash to eMMC for the system.
4	1 x rubber plug, here solely as a reserve hole.
5	1 x Wi-Fi/BT antenna port (optional), SMA connector, which can connect to Wi-Fi/BT antenna.
6	1 x 4G antenna port (optional), SMA connector, which can connect to 4G antenna.
7	1 x HDMI port, Type-A connector, which is compatible with HDMI 2.0 standard and supports 4K 60Hz. It supports to connect a displayer.
8	2 x USB 2.0 ports, Type-A connector, each channel supports up to 480Mbps transmission rate.
9	1 x Reset button, pressing the button will reset the device.
10	1 x green user indicator, user can customize a status according to actual application.
11	1 x green system status indicator, which is used to check the working status of device.
12	1 x red power indicator, which is used to check the status of device power-on and power-off.
13	1 x green 4G indicator, which is used to check the status of 4G signal.
14	4 x green UART indicators, using to check the communication status of UART port.
15	1 x DC input, 2-Pin 3.5mm pitch phoenix terminals with screw holes. It supports 12V~24V input, the signal is defined as VIN+/GND.
16	1 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.
17	2 x RS232 ports, 6-Pin 3.5mm pitch phoenix terminals, which is used to connect third-party control equipment.
18	2 x RS485 ports, 6-Pin 3.5mm pitch phoenix terminal, which is used to connect the third-party control equipment.
19	1 x 10/100/1000M adaptive ethernet port, RJ45 connector, with led indicator. It can be used to access the network.
20	1 x 10/100M adaptive ethernet port, RJ45 connector, with led indicator. It can be used to access the network.
21	Heat dissipation holes, which help improve cooling performance.

1.4 Button

ED-HMI3120-156C 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-HMI3120-156C.

Indicator	Status	Description
PWR	On	The device has been powered on.
	Blink	Power supply of the device is abnormal, please stop the power supply immediately.
	Off	The device is not powered on.
ACT	Blink	The system started successfully and is reading and writing data.
ACT	Off	The device is not powered on or does not read and write data.
USER	On	User can customize a status according to actual application.
USER	Off	The device is not powered on or not defined by the user, and the default status is off.
4G	On	The dial-up is successful and the connection is normal.
4G	Off	4G signal is not connected or the device is not powered on.
Yellow indicatorof Ethernet port	On	The data transmission is abnormal.
	Blink	Data is being transmitted over the Ethernet port.
	Off	The Ethernet connection is not set up.
Green indicatorof Ethernet port	On	The Ethernet connection is in the normal state.
	Blink	The Ethernet connection is abnormal.
	Off	The Ethernet connection is not set up.
COM1~COM4	On/Blink	Data is being transmitted.
COM1~COM4	Off	The 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-HMI3120-156C includes a Micro SD card slot and a Nano SIM card slot.

1.6.1.1 Micro SD Card Slot

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

1.6.1.2 Nano SIM Card Slot (optional)

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

1.6.2 Power Interface

The ED-HMI3120-156C 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.

	Pin ID	Pin Name
	1	GND
	2	12V~24V

1.6.3 Audio Interface

ED-HMI3120-156C includes one audio input, the connector is a 3.5mm 4-pole headphone jack. The silkscreen of port is "", 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-HMI3120-156C contains a power amplifier output, built-in a 4Ω 5W 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-HMI3120-156C 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:

	Pin ID	Pin Name
	1	GND
	2	GND
	3	RS232-1_TX
	4	RS232-3_TX
	5	RS232-1_RX
	6	RS232-3_RX

The pin names of CM5 corresponding to RS232 interface are as follows:

Signal	CM5 GPIO Name	CM5 Pin Out
RS232-1_TX	GPIO4	UART3_TXD
RS232-3_TX	GPIO0	UART2_TXD
RS232-1_RX	GPIO5	UART3_RXD
RS232-3_RX	GPIO1	UART2_RXD

Connecting Cables

Schematic diagram of RS232 wires is as follows:

1.6.6 RS485

ED-HMI3120-156C 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:

	Pin ID	Pin Name
	1	GND
	2	GND
	3	RS485-2_A
	4	RS485-4_A
	5	RS485-2_B
	6	RS485-4_B

The pin names of CM5 corresponding to RS485 interface are as follows:

Signal	CM5 GPIO Name	CM5 Pin Out
RS485-2_A	GPIO12	UART5_TXD
RS485-4_A	GPIO8	UART4_TXD
RS485-2_B	GPIO13	UART5_RXD
RS485-4_B	GPIO9	UART4_RXD

Connecting Cables

Schematic diagram of RS485 wires is as follows:

RS485 terminal resistance configuration

ED-HMI3120-156C 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.

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

Location in PCBA	Corresponding COM port	The specific location of the corresponding COM
J24	COM4
J22	COM2

TIP

You need to open the device case to view the position of 120R jumper resistor.

1.6.7 1000M Ethernet Interface

ED-HMI3120-156C includes one adaptive 10/100/1000M Ethernet port, and the silkscreen is "". The connector is RJ45, and it is recommended to use the network cable of Cat6 and above. The pins corresponding to the terminal are defined as follows:

	Pin ID	Pin Name
	1	TX1+
	2	TX1-
	3	TX2+
	4	TX2-
	5	TX3+
	6	TX3-
	7	TX4+
	8	TX4-

1.6.8 100M Ethernet Interface

ED-HMI3120-156C includes includes an adaptive 10/100M Ethernet port, and the silkscreen is "". 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:

	Pin ID	Pin Name
	1	TX+
	2	TX-
	3	Rx+
	4	-
	5	-
	6	RX-
	7	-
	8	-

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