Article Details

ID: 2085
Case Type: faq
Category: PAC-Designer
Related To: LogiBuilder
Family: Platform Manager

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What is the behavior of the Platform Manager Analog inputs? Is the voltage comparator output a logic \u20181' when the voltage is above UV and OV signal type?

For the Platform Manager (and Power Manager II) devices, each VMON input has an A and B trip point setting. The A trip point is the Over-Voltage (OV) trip point the and the B is the Under-Voltage (UV) trip point.


In the standard mode: The A signal will be 1 when the input voltage exceeds the OV trip point, otherwise it is 0. The B signal will be 1 when the input voltage exceeds the UV trip point, otherwise it is 0.


In the Window mode: The A signal will be 1 when the input voltage is between the UV and OV trip points, otherwise it is 0. The B signal will be 1 when the input voltage exceeds the UV trip point, otherwise it is 0.


Please note the B signal works the same in either mode. In the Window mode most times you can just monitor the A signal since it changes state whenever the input value is outside of the normal range (called the Window).