Topic — Controls & BMS
Data Center Controls & BMS
The building management system coordinates the mechanical plant: staging chillers, sequencing pumps, controlling CRAH units and monitoring everything that matters. In a data center, the BMS design question is sharper than in commercial buildings: what happens to cooling when the control system itself fails?
Good critical-facility controls design pushes autonomy downward. Equipment should continue operating safely on last known commands or local control when the network or supervisory layer is lost. Protocol selection (BACnet, Modbus), network segregation and fail-safe configuration are reliability decisions, not just integration details.
Core engineering questions
- Which control functions are supervisory, and which must survive BMS failure?
- How do drives and CRAH units behave on communication loss?
- Are control networks segregated from IT and corporate networks?
- Is the controls architecture itself redundant where it needs to be?
- How are control failure modes tested during commissioning?
Key design areas
- BMS architecture and controller hierarchy
- BACnet and Modbus integration for drives and mechanical plant
- Communication loss and sensor failure fallback strategies
- Point lists, alarm rationalization and monitoring design
- Cooling optimization and sequencing logic
Guides on this topic
Design GuideComing soon
BMS Architecture for Critical Facilities
Network segregation, controller hierarchy and redundancy.
12 min
Design GuideComing soon
BACnet Control Strategies for Critical Cooling
MS/TP and BACnet/IP integration patterns for drives, CRAH units and plant controllers.
12 min
ArticleComing soon
Modbus in Data Center Applications
RTU and TCP integration for drives, meters and plant equipment.
9 min
Design GuideComing soon
Cooling Control Strategies for Data Centers
Sequencing, staging and setpoint optimization for chilled water plants and air systems.
12 min
Design Guide
Variable Frequency Drives in Data Center Cooling Systems
Engineering guidelines for VFD selection, integration, redundancy and operation in mission-critical cooling infrastructure.
15 min