A Building Management System (BMS) is a computerized monitoring and control system used to manage mechanical, electrical and other building services within railway facilities.

In railway applications, BMS is commonly provided within stations, Operations Control Centres (OCCs), depots, technical buildings and other operational facilities. It allows operators and maintainers to monitor equipment status, environmental conditions, alarms and system performance from centralized or local workstations.

A BMS may monitor and control systems such as Heating, Ventilation and Air Conditioning (HVAC), ventilation fans, pumps, lighting, electrical distribution, water systems and other Mechanical, Electrical and Plumbing (MEP) equipment.

Field equipment such as sensors, actuators and meters may be connected through Programmable Logic Controllers (PLCs), dedicated controllers or distributed control modules. Information is presented to operators through a Human-Machine Interface (HMI).

BMS can provide functions including equipment scheduling, alarm management, temperature and environmental monitoring, energy management, equipment status indication, historical trending and remote control.

In railway projects, the BMS may interface with higher-level systems such as SCADA or other centralized monitoring platforms. The exact division between BMS and SCADA varies between projects and should therefore be defined by the project’s systems architecture and interface requirements.

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