MicroLab’s DC Control Module permits safe and easy-to-use software control of low voltage heaters, relays, or solenoids. It is powered by a UL-rated 12 VDC—1 amp power pack. The power circuit is controlled by an optically-isolated switch driven by a logic signal from one of the three MicroLab Interface FS-528 general purpose input/output ports. Any measurement may be compared to a defined constant control, and other variables can be measured in the same program. Programming examples include controlling temperature while monitoring pH and pressure.