Liebert environmental interface cards support data center monitoring in select Liebert precision cooling systems to provide contact closure monitoring and reporting of system operation. The cards provide contact closure outputs, and report status and major alarm conditions to an existing Building Management System, I/O or alarm panels, and autodialer devices.Liebert environmental discrete output interface cards provide 16 individual contact-closure outputs for status and major alarm conditions of microprocessor-controlled Liebert data center cooling systems.