TC8900 is a family of analogue controllers designed for controls of fan coils with 2-pipe, 2-pipe with change-over, 2-pipe with electrical coil or 4-pipe configurations. For applications without fan speed control the family includes stand alone units (TC-890x), local controllers (TC-893x) with remote setpoint module (ES-8930) and local controllers (TC-894x) with central setpoint module (ES-8940). For applications with fan speed control the family includes the  PM-8900 power modules in connection with TC-894x with or without central setpoint module (ES-8940).