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It is provided with two (2) Dry Contacts to control lights and an external alarms. It is provided with one (1) NTC probe input for temperature measurement. The unit has 2 Digital Inputs, one for a Door Switch and the 2nd as an optional Panic Switch. See the catalog for optional accessories. One 5Pin Input allows the user to program the parameter list with a “Hot Key” (see section 9) Note: The default settings are listed in the back of this manual. They are set for Coolers (Medium Temp). For Free