INM 725B Rev 21576 8 Communication Failure MonitoringIf the system detects a loss of data on the communication link the relay will change state andwill remain in the abnormal state until communications are functioning correctly6 9 Power Failure MonitoringIf the 24VDC logic power fed to the annunciator is lost or the internal logic supply protectionfuse has blown the relay will change state and will remain in the abnormal state until power hasbeen restored.6 10 Card Fault MonitoringIf any of the cards within the system are not functioning correctly the relay will change stateand will remain in the abnormal state until the card functions correctly.6 11 Ground Fault MonitoringIf the optional ground fault monitoring card is fitted the common relay will change statewhenever a ground fault is detected and will remain in the abnormal state until the ground faulthas been cleared.6 12 LED Failure MonitoringIf any window suffers a total failure of the LED assemblies the common relay will change stateand will remain in the abnormal state until illumination is restored. (Please note:- The systemchecks for LED failure on an hourly basis)6 13 GPS MonitoringOn systems supplied with optional time stamping and GPS time sync. the common relay willactivate if the GPS time sync. is not available.6 14 Printer Fault MonitoringOn systems supplied with optional time stamping and online printing of alarms the commonrelay will change state when any printer errors occur and will remain in the abnormal state untilthe printer error has been resolved.6 15 Real Time Clock Fault MonitoringThe common relay will change state if any faults are detected in the RTC and will remain in theabnormal state until the RTC returns to normal.
