– 20 –© LEYBOLD VAKUUM GMBH GA 05.212/10 - 09/00TURBOTRONIK NT13 CONNECTION AND OPERATION 4Fig. 7 TURBOTRONIK NT 13;Pin assignment of the plug connector strip when shippedPlug connector stripX11, NT134.3.2 Connecting the test socketsA voltage is available at the front panel test sockets, which ispro-portional to the DC link current in the TURBOTRONIK ( 1 mV= 1 mA). For specific operating statuses, this current can beassigned a particular inlet pressure; also refer to Fig. 8.The relationship between the pressure and current depends onthe particular application. Please contact us if you have anyquestions.Voltage at the testsocketFig. 8 Voltage at the front panel test sockets as a function oftime when TURBOTRONIK is switch-on (qualitative)6410814121816222026243028328/10relaycontact"pressuretrigger"SupplyL(phase)e.g.forthefanL1L2L3TURBOVACPE(protectiveconduct.)2ndcablescreenGround1stcablescreenN(neutralconductor)PE(protectiveconductor)L(phase)SUPPLYNotassigned/connectedwhentheequipmentisshippedSupplyN(neutralconductor)e.g.forthefanNotassigned/connectedwhentheequipmentisshippedNotassigned/connectedwhentheequipmentisshippedQuiescentvoltageintheunitQuiescentvoltageisreducedTURBOVACaccelerateswithmaximumcurrentCurrentandvoltagedecreasewithdecreasinginletpressureapprox.90stimeVoltage