Intelligent Field Supervisory Unit FSU1000 Specification Product Overview. Intelligent Field Supervisory Unit, 1U rack-mounted, Linux system, built-in monitoring software, access to UPS, air conditioning, distribution cabinets, temperature and humidity, flooding, smoke sensors and other integrated power environment equipment; software for the B/S architecture, Web remote access; the system provides a standard external SNMP, MODBUS RTU/TCP, B interfaces, etc., for the integration of the upper monitoring system or third-party system integration.