The "SCB_StepExtension" is for the main step-controller module Electric Heater / Direct Expansion Cooler. With this add-on module four linear or binary steps can be added to the step-controller module.
Each add on module for step-controller adds up to four output stages to the step-controller Electric Heater / Direct Expansion Cooler . Within the main step-controller module Electric Heater / Direct Expansion Cooler, the definition can be made, whether the outputs will be controlled in a linear or in a binary way. The module has only one input "SeqSignal" for the sequencing signal. The outputs of the module are respectively: "Stage1Cmd", "Stage2Cmd", "Stage3Cmd", "Stage4Cmd" and "SeqSignal" for next add on module for step-controller.