The NT-SSA32/CLK network controller supports up to 32 NetX thermostats.  The NT-SSA32/CLK includes a real-time clock/calendar that allows simple, yet robust environment control.  The network controller enables simple integration with any control system, automation system or personal computer.  Two RS232C ports are included for dual connections to local and remote needs.  Removable screw terminals are included for power and the XBUS thermostat communications.  A 7ft 9-9 pin serial cable is also included for RS-232C connection.  The entire family of controllers has built-in intelligence to correct illegal thermostat settings that might damage equipment. (NT-PWR16 Power Supply is included... no need to buy it separately.)