Moxa

The MPC-3121-E4-LB-SPK-CT-T is a 12.1 inch fanless industrial panel PC with a 500-nit display and built-in 2W speaker. It is designed for transport, railway and industrial applications where operators need both rugged touch control and local audio output. Typical use cases include driver cab interfaces, maintenance panels, machine HMIs, alarm displays, monitoring stations and passenger or operator information systems.

The system is based on the Intel Atom x6425E quad-core processor and includes 8GB DDR4 2400MHz memory as standard, expandable up to 32GB through one SODIMM slot. Storage and expansion support includes one CFast slot, one M.2 M-Key 2242 socket and one mini PCIe slot. This gives the panel PC flexibility for operating system deployment, application storage, embedded data logging or additional communication functions.

Its 12.1 inch display uses a 4:3 aspect ratio and 1024 x 768 resolution, with 16.7 million colours, a 1000:1 typical contrast ratio and wide 178 degree viewing angles. The 500cd/m LCD is suitable for many industrial and cab-based environments, while the projected capacitive touchscreen supports 4-point multi-touch and glove use. This makes it practical for operators working in transport, outdoor or industrial settings where gloves are often worn.

The integrated 2W speaker makes this model useful where audible warnings, alerts or user feedback are required. I/O is provided through M12 push-pull connectors and includes two Gigabit Ethernet ports, one RS-232/422/485 serial port, four digital inputs, two digital outputs, USB 2.0 and speaker or line-out audio. Ethernet ports include 1.5 kV magnetic isolation, and the DIO channels include 3 kV optical isolation for greater resilience in noisy electrical environments.

The MPC-3121-E4-LB-SPK-CT-T supports 24V to 110V DC input, has a listed 51W power consumption and operates from -40°C to 70°C without a fan or heater. Because of the speaker design, it is rated IP66 at the front and IP40 at the rear. With EN 50155 compliance, shock and vibration standards, TPM 2.0, CE and FCC Class A approvals, and support for Windows, Debian and Ubuntu environments, it is a practical 500-nit speaker-equipped panel PC for rugged industrial and transport applications.