Excel 50 is designed as a controller with integrated communication capability. Excel 50 can be used as a standalone controller, integrated in the EXCEL 5000 System, or on a LonWorks network communicating with Excel 10 controllers as room/zone controllers or with third-party products. Typical applications of the Excel 50 controller are heating systems, district heating systems and air conditioning plants for restaurants, small shops, offices, bank affiliates, chain stores and small distributed governmental houses. The controller has 8 analog inputs, 4 analog outputs, 4 digital inputs and 6 digital outputs. 3 out of 4 digital inputs can be used as totalizers. The digital outputs allow the direct drive of 3-position actuators (up to the maximum load).