The Rotem RDT-5 digital thermostat is a five stage digital thermostat that works in conjunction with Rotem controllers or as a stand-alone unit, using its own temperature to detect failures and activate backup systems. Each stage can be set to backup cooling or heating operations. The thermostat displays stage temperature, state and system information, and the front panel LEDs provide basic information about system status. It comes equipped with built-in power and input protection. No software is needed to run the unit; software is used to configure the unit only.