– 13 –© LEYBOLD VAKUUM GMBH GA 05.212/10 - 09/00TURBOTRONIK NT10 CONNECTION AND OPERATION 23. Remote control via an external switchConnect pins 1 and 2 (jumper).The TURBOVAC starts if “STOP2” (pin 3) is connected to thejumper, pin 1-2. The TURBOVAC stops if this connection isinterrupted.4. Automatic start when the power is switched-onConnect the three pins 1, 2 and 3 with one another. TURBOVACstarts automatically when the supply voltage is connected.TURBOTRONIK can also be controlled via relays, optocouplersor open-collector circuits.2.5 Operator controlSwitch-on TURBOTRONIK, the “POWER” LED must light-up.Depress the “START” button, or start TURBOVAC via remotecontrol, refer to Section 2.4.The pump runs-up. The “ACCEL” LED (acceleration) lights-up.The “NORMAL” LED lights-up and the “ACCEL” LED goes darkwhen approximately 90% of the rated speed is reached.Depress the “STOP” button, or shutdown TURBOVAC via remotecontrol, refer to Section 2.4.Only the “POWER” LED is lit.After a fault has been removed, also depress the “STOP” button,or shutdown TURBOVAC via remote control and then restart it.Starting TURBOVACSwitching-offTURBOVACOperating mode 3Operating mode 4