36 AT-IFS802SP-80 User Manual
6.9 Fault Relay Alarm
The Fault Relay Alarm function provides the Power Failure and Port Link Down/Broken detection.
With both power input 1 and power input 2 installed and the check boxes of power 1/power 2 ticked,
the FAULT LED indicator will then be possible to light up when any one of the power failures occurs.
As for the Port Link Down/Broken detection, the FAULT LED indicator will light up when the port
failureoccurs;certainlythecheckboxbesidetheportmustbetickedrst.Pleaserefertothesegment
of‘Wiring the Fault Alarm Contact’ for the failure detection.
Power Failure• : Tick the check box to enable the function of lighting up the FAULT LED on the
panel when power fails.
Port Link Down/Broken• : Tick the check box to enable the function of lighting up FAULT LED
on the panel when Ports’ states are link down or broken.
Fault Relay Alarm interface
6.10SNTPConguration
SNTP(SimpleNetworkTimeProtocol)isasimpliedversionofNTPwhichisanInternetprotocolused
tosynchronizetheclocksofcomputerstosometimereference.Becausetimeusuallyjustadvances,the
time on different node stations will be different. With the communicating programs running on those
devices,itwouldcausetimetojump forwardandback,anon-desirableeffect.Therefore,theswitch
provides comprehensive mechanisms to access national time and frequency dissemination services,
organize the time-synchronization subnet and the local clock in each participating subnet peer.
Daylight saving time (DST) is the convention of advancing clocks so that afternoons have more daylight
andmorningshaveless.Typicallyclocksareadjustedforwardonehournearthestartofspringandare
adjustedbackwardinautumn.