DEVICE FOR CHECKING SECONDARY POWER SUPPLY Russian patent published in 1999 - IPC

FIELD: electrical engineering; designing systems with limited number of telemetering channels. SUBSTANCE: device has first and second secondary power supplies connected to supply voltage buses, comparator connected to input of first threshold element, second threshold element, AND gate, and OR gate, Outputs of first threshold element and AND gate are connected, respectively, to inputs of first and second final units. Device provides for eliminating false information in case of failure or drop of primary supply voltage. EFFECT: enlarged functional capabilities due to introducing power supply serviceability check. 1 dwg