What Is OPS (Open Pluggable Specification)?

The Open Pluggable Specification (OPS) is a standard for a computer module that slides into a slot in the back of a display. NEC, Intel and Microsoft announced it in 2010 so that signage and interactive displays from different makers could take the same plug-in PC. The display provides the slot, the power and the screen; the module provides the processor, memory, storage and operating system.

Everything passes through one connector. The module carries a JAE TX25 plug and the display has a matching TX24 socket, with 80 pins between them. The display feeds the module 12–19 V DC, and the module sends video back as TMDS (HDMI or DVI) and DisplayPort, along with audio, USB 2.0 and USB 3.0, a UART serial line and HDMI-CEC. Control pins let the display switch the module on, see that it is present and read its power-good signal, so the screen and the PC start and stop as one.

The module itself is a closed metal box of about 180 × 119 × 30 mm, defined by the specification so that any compliant module fits any compliant slot. Its front panel, which faces out of the display, usually adds its own HDMI, USB and Ethernet ports for service and peripherals.

An OPS PC is a complete small computer. The parts are the same as in any mini PC, packed to the fixed size and cooled by a small fan that draws air through the display’s slot.

OPS exists to remove the box and cables behind the screen. With the computer inside the display there is no external PC to mount, no HDMI lead to work loose and no separate power supply. On a classroom panel or a wall of meeting-room screens, that also means nothing for anyone to unplug or take away.

Service is the other reason. If a module fails, or the content needs more processing power, a technician removes two screws, slides the old module out and slides a new one in. The display stays on the wall. Our OPS computers range runs from 12th and 13th Gen Intel Core modules to Core Ultra modules with a built-in NPU for on-screen AI, all with 8K or 5K output through the connector.

There are limits. Not every display has a slot, and those that do are mostly commercial signage and interactive flat panels. The module lives inside the display’s heat, so modules are typically rated for commercial temperatures of around 0 to 45 °C. Where a screen runs outdoors, in a hot enclosure or 24/7 in a kiosk, a separate fanless digital signage player mounted behind or near the display is usually the better fit for the installation.

Intel introduced the Smart Display Module (SDM) around 2019 as a smaller, lower-cost successor to OPS. Instead of a boxed module with a JAE connector, an SDM is a bare board with a PCIe-style edge connector that plugs straight into a socket on the display’s main board, behind the display’s own rear cover.

SDM comes in two sizes. SDM-S is the small format, aimed at compact, lower-power players. SDM-L is the large format, with room for an Intel Core processor, SO-DIMM memory, an NVMe SSD and its own rear I/O bracket. Our smart display modules are SDM-L boards on 12th and 13th Gen Intel Core, some with Intel vPro and 2.5 Gigabit Ethernet, passing HDMI and DisplayPort to the panel through a PCIe x8 edge connector and running from 12 V supplied by the display.

OPS and SDM do the same job in different ways, and they are not interchangeable. A display is built for one or the other, so the slot decides the module.

Some manufacturers also offer OPS+, which adds a second connector beside the standard one for 8K or several 4K outputs. Check the display datasheet for the exact slot before choosing a module.

We supply OPS computers and SDM modules with memory, storage and a Windows 11 or Linux image fitted, tested in the slot before they ship as standard. Send us the display model and the content it will run, and we will match the module to the slot.