The speed monitoring relay monitors a motor for exceedance of the upper and lower limit via a sensor attached to the motor, which supplies one impulse per rotation. A speed signal edge is evaluated to also ensure the reliable detection of motors and systems in idle states. Thanks to a scaling factor, up to ten sensors can be placed per rotation to accelerate the measuring with extremely slowly rotating motors while still measuring the present speed correctly.
Monitoring for belt breakage or slippage
Standstill monitoring (not for personal protection)
Transport item monitoring for completeness