Iskra MC350 - Digital Input Module; Tariff Input Module

SETTINGS
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Measuringcentres
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MC320,MC330,MC350&MC350H ‐ User’sManua
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Alarmgroupsconnectedtoaspecificoutputmodulecanalsobedefinedviakeyboard.
MainmenuSettingsInputs/OutputsV/I1/2/3/4SettingofalarmoutputOK
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SIGNALSHAPE:
 Normal−arelayisclosedunlcondionforthealarmisfulfilled.
 Normalinverse−arelayisopenunlcondionforthealarmisfulfilled.
 Latched−arelayisclosedwhencondionforthealarmisfulfilled,andremainsclosedunlitisreset
viacommunication.
 Latchedinverse–arelayisopenedwhenconditionforthealarmisfulfilled,andremainscloseduntilit
isresetviacommunication.
 Pulsed−animpulseofthesetlengthissentalwayswhencondionforthealarmisfulfilled.
 Pulsed inverse − a pause of the set length is sent always when condion for the alarm is fulfilled.
Otherwiserelayisclosed.
 Alwaysswitchedon/off(permanent)–Arelayispermanentlyswitchedonorswitchedoffirrespective
oftheconditionforthealarm.
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Thispossibilityofpermanentalarmsettingenablesremotecontrolviacommunication.
Digitalinputmodule 
Modulehasno settings. General purposeis tocollect digital signals from various devices, such as(intrusion
detection relay, different digital signals in transformer station, industry …). It is available in three different
hardwareversions.
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WhenusedinDCmodeitcanalsobeusedasapulsecounterfromexternalmeters(water,gas,heat…).Itsvalue
canbeassignedtoanyoffourenergycounters(seechapterEnergyonpage31).
Tariffinputmodule 
TARIFFINPUT
Hasnosetting.Itoperatesby setting active tariff at a tariff input (seechapterTariff clockonpage 32). The
instrument can have maximal one module with 2 tariff inputs only. With the combination of 2 tariff inputs
maximal4tariffscanbeselected.
ACTIVETARIFFSELECTIONTABLE:
Activetariff
Signalpresenceontariffinput
InputT1/T2 InputT3/T4
Tariff1 0 0
Tariff2 1 0
Tariff3 0 1
Tariff4 1 1
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