Systemair TT-S4/D Step switching unit

Step controller for DIN-rail mounting in a cabinet or other enclosure. The controller is intended for controlling electric heating batteries, 4 relay output. The step controller can be set to sequence or binary mode. Can be used together with any controller with 0...10 V output signal. The switch setting on the front of the controller determines the number of steps to be used. The input signal 0...10 V is divided up into the number of steps, thus setting the switch-on point for each step.