Case Studies

High Availability Industrial Refrigeration

Posted in Inventory and Warehouse Control, Manufacturing Automation and Intelligence, Medical and Pharmaceutical, PLC Programming, Siemens PLC


DMC worked with a cold room installer to deliver several cold storage rooms for a large medical diagnostics manufacturer.


DMC developed a flexible controls platform that was easily adaptable for a wide range of needs, from small R&D spaces to large warehouse areas spanning 5 °C, -20 °C, and -40 °C setpoints. The systems were designed for high availability, with automatic failover of redundant cooling units and a dual PLC architecture. Integration with digital chart recorders and the facility’s BMS (Building Management System) ensured that the rooms met stringent quality and documentation standards.

DMC also assisted with the preparation and execution of validation plans to ensure cGMP compliance. Following the success of the initial project, DMC has completed a number of additional rooms with the same client.

Learn more about DMC's PLC Programming services and our partnership with Siemens

Customer Benefits

  • Fault-tolerant, high availability system design
  • Common controls platform for numerous cold rooms throughout the facility
  • Extensive status monitoring
  • Redundant temperature logging


  • Siemens S7-1500 PLCs
  • Siemens WinCC Comfort HMIs
  • Siemens Sirec D300 Display Recorders