Of the product line "T", this is the standard version. It has a multi-color touch panel and a controller that is 32 bit. It has a RS 232 interface and for malfunctioning signals it has a potential free contact. There are many benefits such as with EMC and CE regulation, it is fully compliant. It uses refrigerants and materials that are environmentally friendly. The construction is service friendly and the noise level is minimal. Programming and operation is very user-friendly.