Pulse Input Module
Triconex Trident safety system, version 2.1.1, has two new input modules  to enable faster response to unsafe equipment conditions and to  optimize trip data analysis to prevent future upsets. The system has an  enhanced pulse-input module to measure speed, rate-of-speed change and  rate of acceleration of rotating equipment in milliseconds. The digital  input module monitors changes of state and sequence of events (SOE) and  provides a timestamp resolution of 1 ms with an accuracy of 1 ms.
