What "Device On" Means in Industrial Computing
When a computer has to stay on — a signage player, a shop-floor terminal, a kiosk, a data-logging node or a thin client session host — the requirement is not raw speed. It is the ability to run continuously without thermal throttling, without fan failures, and without needing a human to walk over and press the power button after every outage. An "always-on" device is engineered around three things: passive cooling, wide input power tolerance, and firmware-level recovery features such as auto power-on after AC restore, RTC wake timers and a hardware watchdog timer.
Key Specifications That Keep a Device Running
| Requirement | What to look for | Why it matters |
|---|---|---|
| Cooling | Fanless, aluminium heat-spreader chassis | No moving parts to seize after months of continuous duty; no dust ingress from forced air |
| Power input | Wide-range DC input with lockable jack or terminal block | Tolerates brownouts and adapter variation in industrial cabinets |
| Recovery | Auto power-on on AC restore, RTC wake, watchdog timer | The system returns to service unattended after a power cut or software hang |
| Storage | SSD or eMMC instead of spinning disk | Survives vibration and shock; no mechanical wear from constant I/O |
| Thermals | Wide operating temperature range | Stable through hot switch rooms and unheated enclosures |
| Power draw | Low idle TDP (6–15 W class processors) | A device left on for a year costs far less to run and generates less heat |
| Management | Wake-on-LAN, PXE boot, remote OS imaging | Fleet can be re-provisioned without site visits |
Choosing the Right Form Factor for Continuous Duty
| Form factor | Typical always-on role
