Crydom Offers a broad line of digital I/O modules and mounting boards. Designed for long, reliable service in demanding industrial enviroments, these modules provide optical isolation between logic‑level control systems and external loads, such as motors, valves, solendoids, resistive heating elements, etc.. Input Modules provide digital feedback to the control system when the load is energized and are available with inputs up to 280VAC/48VDC, with either a 5VDC or 24VDC logic‑level output.