The Rotech Control Module type aue - 400 is intended for use with the Rotech range of shaft encoders, roller - encoders and proximity probes to detect if the speed of a rotating shaft or drive rises or falls below a pre - set level. The front mounted dial allows easy setting of the required trip/alarm speed directly in R.P.M. Three speed ranges are available on each module. Standard ranges are 1 - 10 R.P.M, 1-100 R.P.M AND 1-1,000 R.P.M. The required range being selected by link on the terminal rail. Other modules are available with ranges covering the speeds 0.01 R.P.M to 20,000 R.P.M.

In normal operation the output relay of the module is energised if the speed of the shaft is above the set level and de- energised if the speed is below the set level. An internal 10 second delay timer is available to allow for the run up time of the drive being monitored. Front mounted led's indicate power on, delay on, relay energised, and input signal.