Industrial SA3B1D1 Speed Switch

Industrial SA3B1D1 Speed Switch, part of Control Concepts’ DAZIC RotoGuard III family, is an electronic speed monitor that detects changes in rotational motion on compatible equipment and provides a controlled output when speed deviates. The SA3B1D1 variant accepts 120 VAC input and is specified with a mounting frame for installation. It offers a DPDT (double pole, double throw) relay output rated at 5 A, enabling straightforward integration with alarms, interlocks, or control circuits in industrial systems. The RotoGuard III line is designed to sense changes in motion across a range that can include 1 to 400 RPM depending on the model, delivering a change-of-state signal when operating speed increases, decreases, or stalls. Typical applications span rotating machinery such as conveyors, fans and blowers, mixers, and pumps, where monitoring for speed variations helps prevent belt slip, overload conditions, or unintended shutdowns. With its electronics-based speed sensing and reliable relay action, the SA3B1D1 provides a concrete means to guard processes and protect equipment in demanding industrial environments without requiring bespoke hardware.