We provide our customers with various protection systems for monitoring motors, pumps, and small turbines. These systems may be implemented to monitor any required value of rotational speed, including standstill. These single channel monitors can be provided with 1oo1, 1oo2 or 2oo2 architecture.
With single channel processing (1oo1) safety provision is solely determined by the device configuration. Therefore the use of sensor monitoring with integrated plausibility control is essential. In such a case no redundancy is provided. Should a fault be detected, the entire system will be shut down immediately.
With two channel systems, there is a choice of implementation, dependent upon requirements. In principle, the two devices operate in parallel yet independently. Alarm indication can be realized through the linkage of their status signal outputs.
For 1oo2 processing we have system redundancy with enhanced safety through comparative diagnosis. In the case of fault detection, the entire system will be shut down.
With 2oo2 processing, we still have system redundancy but with enhanced availability. Only if both systems fail, the system as a whole will be shut down.