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Siemens Trainguard PTC OBU was developed to meet the highest safety standards of the rail industry. The OBU is packaged in an AAR S-9101-compliant 9 MCU IP65 conduction-cooled housing: no fans, vents, moving parts, or batteries, which ultimately leads to no maintenance. The form-factor and rich I/O suite make it ideal for a wide array of locomotive, freight and commuter applications. The front panel is equipped with a diagnostic HMI that allows crews to assess at-a-glance the health of the OBU, as well as key functions of the locomotive. It connects directly to locomotive power, no external supply is required.