PUL1012S, PUL4024S, PUL6438S, PVL0000AS, PVL4022AS, PVL4024NS, PVL6436AS, and PVL6438NS are products of the Excel 10 controller family. The eight products are programmed and configured using NIAGARA fra-meWORK software to control the HVAC devices via a Lonmark-compliant free topology transceiver (FTT). The controller provides a variety of options and the most advanced system control functions, so as to achieve the perfect control of commercial buildings. The controller can be used in a variety of applications for VAV and general purpose HVAC control. Each controller contains * main microprocessor to control the HVAC program and * microprocessor responsible for LonWorks? Correspondence. The controller provides flexible general input for external sensor connection; Digital input, analog output and thyristor output.