Moxa
MPC-3121-E4-LB-SPK-CT-T

MPC-3121-E4-LB-SPK-CT-T

MPC-3121 Series

12.1-inch fanless industrial panel PCs with EN 50155 certifications

  • 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

Certifications UL Listed · En50155 · CE · FCC

Get a QuoteContact Sales

Ships from and sold by A5 IT, an authorized Moxa reseller.

Specifications

Computer

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)

Computer Interface

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

Display

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 Function

Touch Type
Projective Capacitive touchscreen (PCAP)
Touch Support Points
4 points
Glove Support
Yes

Ethernet Interface

Magnetic Isolation Protection
1.5 kV (built-in)

Serial Interface

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

Serial Signals

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

Digital Inputs

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

Digital Outputs

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

LED Indicators

System
Power x 1

Power Parameters

Input Voltage
24 to 110 VDC
Power Consumption
51 W

Physical Characteristics

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)

Environmental Limits

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)

Standards and Certifications

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

Declaration

Green Product
RoHS, CRoHS, WEEE

Warranty

Warranty Period
System: 3 years LCD: 1 year
Details
See www.moxa.com/warranty

Documentation

NameTypeVersionDate
Datasheet for MPC-3121 Series1.2 MBDatasheetv1.1Aug 19, 2026
MPC-3000 Series Windows 10 IoT Enterprise LTSC 2021 (21H2) User Manual8.5 MBManualv2.0Aug 18, 2026
MPC-3000 Series Linux User Manual1.7 MBManualv2.0Jul 15, 2026
MPC-3000 Series Windows 11 Professional 2025 Manual6.9 MBManualv1.0Jul 15, 2026
Declaration of Conformity (EU/UK) for MPC-3101_MPC_3121300.1 KBDeclarationv1.0Jul 07, 2026

Other models in the MPC-3121 Series

MPC-3121-E4-CT-T
MPC-3121-E4-CT-T
MPC-3121-E4-LB-CT-T
MPC-3121-E4-LB-CT-T
MPC-3121-E4-SPK-CT-T
MPC-3121-E4-SPK-CT-T