Industrial D421.51U2 Speed Monitor Electronic Transducer

The Braun D421.51U2 Speed Monitor Electronic Transducer is a speed-monitoring device that senses rotational speed and converts it to an analog signal for control systems. It is part of Braun’s D421.51/D421.52 series and provides two setpoint alarms via SPDT contacts, enabling local or remote indication when the monitored speed crosses configured thresholds, and it offers an optional analog output to feed a speed controller or data acquisition system. The unit is specified for 85-265 V AC power input, making it suitable for broad mains environments in industrial installations. This device is used to monitor the speed of rotating equipment and provide reliable, fast signaling to automation systems for safety, control, or process optimization.