The CLICK PLC requires no mounting base and includes free programming software. By itself, a powered CLICK CPU unit can function as a complete PLC system. The unit features eight inputs and six outputs, available in four combinations of built-in I/O types. For expansion, 11 option modules are available for flexible system configuration, up to 142 I/Os. All CPUs support 8K steps of Flash EEPROM program memory and 8K words of data memory. Two 24VDC power supply options, with either 0.5A or 1.3A outputs, can be used to power the product.