MPC-3121 Series

12.1-inch fanless industrial panel PCs with EN 50155 certifications

moxa-mpc-3121-series-image-1-(1).jpg | Moxa

moxa-mpc-3121-series-image-2-(1).jpg | Moxa

moxa-mpc-3121-series-image-3-(1).jpg | Moxa

moxa-mpc-3121-series-image-4-(1).jpg | Moxa

Features and Benefits

12-inch panel PCs
Intel Atom® x6425E quad-core processor
500-nit or 1000-nit sunlight-readable LCD
Glove-friendly, multi-touch screen
-40 to 70°C wide-temperature design, no fan or heater
24 to 110 VDC wide range isolated power input
Complies with all EN 50155 mandatory test items This product is suitable for rolling stock railway applications, as defined by the EN 50155 standard. For a more detailed statement, click here: www.moxa.com/doc/specs/EN_50155_Compliance.pdf

Certifications

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Introduction

The MPC-3121 12-inch panel PCs with Intel Atom® x6425E quad-core processor deliver a reliable, durable, and versatile platform for use in industrial environments. All interfaces come with IP66-rated M12 connectors to provide anti-vibration and waterproof connections. With two software selectable RS-232/422/485 serial ports and two Gigabit Ethernet ports, the MPC-3121 panel PCs support a wide variety of serial interfaces as well as high-speed IT communications, all with native network redundancy.

The MPC-3121 panel PCs are designed for the -40 to 70°C temperature range, and come with a fanless, streamlined enclosure for highly efficient heat dissipation. This makes the computers a reliable industrial platform for harsh, hot, outdoor environments like oil and gas fields, or drilling platforms. The MPC-3121 also features a 500-nit or 1000-nit LCD panel offering a sunlight-readable, projected-capacitive, glove-friendly, multi-touch screen, for an excellent user experience.

Appearance

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CPU

Intel Atom® x6425E processor (Quad core, 1.5M cache, 2 GHz)
Graphics Controller

Intel® UHD Graphics
System Memory Pre-installed

8 GB DDR4 2400 MHz (32 GB max)
System Memory Slot

SODIMM DDR4 2400 slots x 1 (up to 32 GB max.)
Supported OS

Windows images and drivers supported:
- Windows 10 IoT Enterprise LTSC 2021 (64-bit)
- Windows 11 Professional (64-bit)
- Windows 11 IoT Enterprise LTSC 2024
Linux image supported:
- Debian 13 (kernel 6.10)
Linux driver supported:
- Ubuntu 24.04 LTS (kernel 6.10)
Storage Slot

CFast slot x 1
M.2 M-key 2242 sockets x 1
Expansion Slots

mPCIe slots x 1
Speaker

MPC-3121-E4-LB-SPK-CT-T/E4-SPK-CT-T:
1 (built-in, 2 W)

Ethernet Ports

Auto-sensing 10/100/1000 Mbps ports (M12 push-pull X-coded) x 2
Serial Ports

RS-232/422/485 ports (M12 push-pull A-coded 12P) x 1
Digital Input

DIs x 4 (M12 push-pull A-coded connector)
Digital Output

DOs x 2 (M12 push-pull A-coded connector)
Audio Input/Output

1 x Speaker out/Line out (M12 push-pull A-coded 8-pin)
USB

USB 2.0 hosts x 1 (M12 push-pull A-coded 5-pin), type-A connectors
TPM

TPM v2.0

Panel Size

12 in (viewable image)
Aspect Ratio

4:3
Active Display Area

245.76 (H) x 184.32 (V) mm
Contrast Ratio

1000:1 (typ.)
Light Intensity (Brightness)

MPC-3121-E4-LB-CT-T/E4-LB-SPK-CT-T: 500 nits
MPC-3121-E4-CT-T/E4-SPK-CT-T: 1000 nits
Max. No. of Colors

16.7M (8-bit/color)
Panel Type

AAS
Pixel Pitch (RGB)

0.240 (H) x 0.240 (V) mm
Pixels

1024 x 768
Response Time

(Tr+Tf) 25 ms
Viewing Angles

178°/178°

Touch Type

Projective Capacitive touchscreen (PCAP)
Touch Support Points

4 points
Glove Support

Yes

Magnetic Isolation Protection

1.5 kV (built-in)

Bitrate

50 bps to 115.2 kbps
Data Bits

5, 6, 7, 8
Flow Control

RTS/CTS, XON/XOFF, Automatic Data Direction Control (ADDC) for RS-485, RTS Toggle (RS-232 only)
Parity

None, Even, Odd, Space, Mark
Stop Bits

1, 1.5, 2

RS-232

TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND
RS-422

Tx+, Tx-, Rx+, Rx-, GND
RS-485-2w

Data+, Data-, GND
RS-485-4w

Tx+, Tx-, Rx+, Rx-, GND

Isolation

Optical: 3 kV
Sensor Type

Dry contact
Wet contact (NPN)
Voltage

Dry contact @25 Hz: 0 to 30 VDC
Dry Contact

DI to COM
Logic 0: Close to GND
Logic 1: Open
Wet Contact

Source to DI:
Logic 1: 3 VDC max
Logic 0: 10 to 30 VDC

Isolation

Optical: 3 kV
I/O Type

Sink
Current Rating

Max. 200 mA per channel
Voltage

Logic 0: 200 mA (max. per channel), sink
Logic 1: 24 VDC (typ.), 30 VDC (max.), open collector

System

Power x 1

Input Voltage

24 to 110 VDC
Power Consumption

51 W

Housing

Metal
IP Rating

IPMPC-3121-E4-LB-SPK-CT-T/E4-SPK-CT-T:
- IP66 (front)
- IP40 (rear)
MPC-3121-E4-LB-CT-T/E4-CT-T:
- IP66 (front and rear)
Dimensions

297 x 238 x 59 mm (11.69 x 9.37 x 2.32 in)
Weight

3100 g (6.83 lb)

Operating Temperature

-40 to 70°C (-40 to 158°F)
Storage Temperature (package included)

-40 to 70°C (-40 to 158°F)
Ambient Relative Humidity

5 to 95% (non-condensing)

EMC

EN 55032/35
EMI

CISPR 32, FCC Part 15B Class A
EMS

IEC 61000-4-2 ESD: Contact: 6 kV; Air: 8 kV
IEC 61000-4-3 RS: 80 MHz to 1 GHz: 3 V/m
IEC 61000-4-4 EFT: Power: 2 kV; Signal: 1 kV
IEC 61000-4-5 Surge: Power: 1 kV; Signal: 1 kV
IEC 61000-4-6 CS: 10 V
IEC 61000-4-8 PFMF
Mechanical Protection Rating

IEC 60529, IP code
Safety

IEC 62368-1
UL 62368-1
Shock

EN 50155 standard
Vibration

EN 50155 standard

Green Product

RoHS, CRoHS, WEEE

Warranty Period

System: 3 years
LCD: 1 year
Details

See www.moxa.com/warranty

Download datasheet

Support Documents

Name	Type	Version	Release Date
Datasheet for MPC-3121 Series 1.2 MB	Datasheet	v1.0	Jul 16, 2026 Jul 16, 2026
MPC-3000 Series Windows 11 Professional 2025 Manual 6.9 MB	Manual	v1.0	Jul 15, 2026 Jul 15, 2026
QIG or MPC-3101 and MPC-3121 Series 3.3 MB	QIG	v1.0	Jul 15, 2026 Jul 15, 2026
MPC-3000 Series Linux User Manual 1.7 MB	Manual	v2.0	Jul 15, 2026 Jul 15, 2026
MPC-3101/MPC-3121 Series Hardware Manual 7.3 MB	Manual	v1.0	Jul 15, 2026 Jul 15, 2026
Declaration of Conformity (EU/UK) for MPC-3101_MPC_3121 300.1 KB	Declaration	v1.0	Jul 07, 2026 Jul 07, 2026

Rugged Industrial Panel PCs for Your HMI Applications

Available Models (4)

Show Images

	Compare MPC-3121-E4-LB-CT-T	Compare MPC-3121-E4-LB-SPK-CT-T	Compare MPC-3121-E4-CT-T	Compare MPC-3121-E4-SPK-CT-T
Panel	12” (4:3) 500 nits	12” (4:3) 500 nits	12” (4:3) 1000 nits	12” (4:3) 1000 nits
CPU	PCAP	PCAP	PCAP	PCAP
RAM	Intel Atom® x6425E	Intel Atom® x6425E	Intel Atom® x6425E	Intel Atom® x6425E
Touchscreen	8 GB	8 GB	8 GB	8 GB
Embedded Speaker	–	1 (2 W)	–	1 (2 W)
LAN	2	2	2	2
Serial	1	1	1	1
DI/DO	4/2	4/2	4/2	4/2
Power Input	24 to110 VDC	24 to110 VDC	24 to110 VDC	24 to110 VDC
IP Rating	IP66 (front), IP66 (rear)	IP66 (front), IP40 (rear)	IP66 (front), IP66 (rear)	IP66 (front), IP40 (rear)
Operating Temp.	-40 to 70°C	-40 to 70°C	-40 to 70°C	-40 to 70°C
	Add to Quote View Bag	Add to Quote View Bag	Add to Quote View Bag	Add to Quote View Bag

MPC-3121 Series

12.1-inch fanless industrial panel PCs with EN 50155 certifications

Features and Benefits

Certifications

Introduction

Appearance

Computer

CPU

Graphics Controller

System Memory Pre-installed

System Memory Slot

Supported OS

Storage Slot

Expansion Slots

Speaker

Computer Interface

Ethernet Ports

Serial Ports

Digital Input

Digital Output

Audio Input/Output

USB

TPM

Display

Panel Size

Aspect Ratio

Active Display Area

Contrast Ratio

Light Intensity (Brightness)

Max. No. of Colors

Panel Type

Pixel Pitch (RGB)

Pixels

Response Time

Viewing Angles

Touch Function

Touch Type

Touch Support Points

Glove Support

Ethernet Interface

Magnetic Isolation Protection

Serial Interface

Bitrate

Data Bits

Flow Control

Parity

Stop Bits

Serial Signals

RS-232

RS-422

RS-485-2w

RS-485-4w

Digital Inputs

Isolation

Sensor Type

Voltage

Dry Contact

Wet Contact

Digital Outputs

Isolation

I/O Type

Current Rating

Voltage

LED Indicators

System

Power Parameters

Input Voltage

Power Consumption

Physical Characteristics

Housing

IP Rating

Dimensions

Weight

Environmental Limits

Operating Temperature

Storage Temperature (package included)

Ambient Relative Humidity

Standards and Certifications

EMC

EMI