> Building Automation > Vista > TAC Xenta 121-FC Programmable Fan Coil Controller 
TAC Xenta 121-FC is an easily programmable controller intended for both 2-pipe and 4-pipe applications, with or without re-heat. It can be configured for use with a multitude of valve actuator types, such as on/off, multistage,increase/decrease, PWM, etc. The controller has different types of fan control and advanced fan control functions, including on/off delays, boosting and conditioning.
The sequences for cooling, heating and fan are completely user programmable,allowing for numerous different applications. For energy savings the controller has built-in economizer functionality. Use TAC Xenta 121-FC with any TAC STR room unit.
Set-up is done using the programming tool TAC ZBuilder, which can be run stand-alone or as a device plug-in to either TAC Vista or LNS. The configuration settings are downloaded into a TAC Xenta 120, prepared with the necessary basic application software.
The controller is a LonMark® compliant device aimed at communicating on a LonTalk® TP/FT-10 channel. It is able to operate both as a stand-alone device and as part of a system. Input and output network variables can be monitored via the TAC Xenta OP, but programming relies on the use of the TAC ZBuilder.
