Control unit C.PCO

Control intelligence for high-density data centre cooling
Data centre liquid cooling addresses rising thermal power densities in HPC and modern rack architectures. CAREL supplies control platforms and edge devices to manage immersion and direct-to-chip cooling, while integrating with air-cooling where required to support mixed server fleets. Scalable control and monitoring are key to safe, efficient operation.

The CDU at the heart of liquid cooling
The Coolant Distribution Unit (CDU) transfers heat collected by the IT cooling loop to the Facility Water System (FWS). The FWS rejects heat via a chiller or a dry cooler depending on ambient conditions. CAREL supports CDU configurations from compact in-rack units to larger floor-mounted systems with dual Ethernet ports and flying-master logic for distributed architectures.

Control, sensors and software for mission-critical units
STone, CAREL’s programming environment, provides a unified development platform for custom control logic and secure commissioning. Liquid cooling implementations require precise fluid monitoring, typically with redundant sensors for temperature and pressure. The pCOe A-IN expansion board adds up to 16 analogue inputs to extend signal acquisition for growing deployments.

Edge connectivity and system efficiency
Liquid-cooled installations often integrate with servers and DCIM platforms. CAREL offers edge devices supporting Redfish and MQTT and DIN-mounted units for stand-alone interfacing. CAREL solutions also coordinate chillers and dry coolers during peak loads to reduce inlet air temperature and optimise overall system performance. From CDU control to FWS coordination, CAREL enables connected, scalable cooling architectures.

Key CAREL solutions mentioned

• c.pCO controllers (including compact in-rack c.pCO mini)
• pCOe A-IN expansion board (up to 16 analogue inputs)
• STone programming environment for custom control logic
• boss one edge device and boss one DIN for Redfish and MQTT connectivity
• chillBooster for chiller/dry cooler support during peak conditions

Technical characteristics / specifications

• CDU function: transfers heat from IT cooling loops to the Facility Water System (FWS)
• Typical working fluids: water with propylene glycol or two-phase fluids
• FWS heat rejection: chiller or dry cooler depending on ambient conditions
• c.pCO mini: compact in-rack controller option for small CDUs
• Larger CDU systems: floor-mounted designs with dual Ethernet ports and flying-master logic
• pCOe A-IN: expansion board adding up to 16 analogue inputs for increased signal monitoring
• STone: unified development environment for secure, mission-critical control customisation
• Edge connectivity: boss one supports Redfish and MQTT protocols; boss one DIN provides stand-alone interfacing
• chillBooster: supports chillers/dry coolers during peaks, reducing air temperature and improving system performance
• Monitoring: redundant temperature and pressure sensors commonly used for mission-critical reliability