Flowline LU78 EchoSwitch Bedienungsanleitung PDF herunterladen (Seite 18)

18of34 MN300282 RevA

CONFIGURATION(cont.) StepFive

HowtosetRelayFail‐Safe/LOST:Intheeventthesensordoesnotreceiveanecho,theFail‐SafeOutputor

LOST setting can be set to turn  each relay ON, OFF or HOLD (to last state) to achieve the desired fail‐safe

condition.Duringfail‐safe,thedisplaywillreadLOST.

1. InTOP‐LEVELMENUmode,selectSAFE.

2. SelectR1(Relay1),R2(Relay2)orR2(Relay3).

3. SelectON,OFF,orHOLD.

4. SelectEXITtoreturntoTOP‐LEVELMENU.

Power Outage:If power to the EchoSwitch® is

removed (intentionally or accidentally), the relays

willreturntothenormalstate.Thus,inRelay1,NC

terminalwillbeclosedandNOterminalwillbeopen.

Also,the NO terminalsin relays2 and 3will also be

open.Make sure that the de‐energized state is the

safe state in your system design.The EchoSwitch®

doesusenon‐volatilememorysoanypowerlosswill

notaffectthesettingsorconfigurationofthesensor.

HowtoselectFail‐SafeCurrentOutput/LOST:Intheeventthesensordoesnotreceiveanecho,theFail‐Safe

Current Output or LOST setting  can be set to output a current of 4mA, 21mA or Hold (last known value).

Duringfail‐safe,thedisplaywillreadLOST.

1. InTOP‐LEVELMENUmode,selectSAFE.

2. SelectOUTPUT.

3. Select4mA,21mA,orHOLD.

4. SelectEXITtoreturntoTOP‐LEVELMENU.



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Flowline LU78 EchoSwitch Bedienungsanleitung Seite 18