Connection
2.5 Connecting the Venting
Valve
The mains power supply to the socket (3/11) is switched
on without any delay when START is activated. The
power is turned off when STOP or FAILURE are activa-
ted; max. load 100 VA. The relevant fuse (3/10) is below
the socket.
Power Failure Airing Valve or Purge Gas- and Ven-
ting Valve
If the TURBOVAC is operated without purge gas
connect up the power failure airing valve to the VALVE
socket (3/11).
If the TURBOVAC is operated with purge gas connect
up the purge gas- and venting valve to the VALVE socket
(3/11).
A short power failure will immediately initiate venting of
the pump.
Delayed Venting Device and Venting Valve
When shutting down or in case of a power failure the
connection of the delayed venting device (see Section
1.4) allows for setting the start and duration of the ven-
ting sequence in order to protect a system or a process-
procedure.
The presetting time can vary between 3 to 15 minutes.
A short power failure does not entail an unwanted ven-
ting.
Connect the delayed venting device to (3/11).
2.6 Connecting the Flange
Heater
(Only for pumps with CF connection flange)
The mains power supply to the socket (3/9) is switched
on when HEATING is activated, provided that the pump
operation status is NORMAL; max. load 300 VA.
The relevant fuse (3/10) is below the socket.
Connect the flange heater to the TURBOVAC at socket
(3/9) HEATER.
21
GA 05.208/12 - 05/2003
Fig. 3 TURBOTRONIK NT 20, rear panel
Key to Fig. 3
1
Power switch
2
Relay contact for forevacuum
pump ON/OFF
3
Connection for supply of the
TURBOVAC
4
Connection socket for RS 232
interface
(only for Leybold service)
5
Connection terminal strip;
see also Fig. 5
6
Potentiometer for setting
the delay time
7
DIP switches for setting the
pump code
8
Connection for fan or solenoid
valve for water cooling
9
Connection for heating
10 Fuses
11 Connection for venting valve
12 Connection for power linecord
13 Plug for selecting the mains
voltages with integrated fuse
1
2
3
4
5
13
12
11
10
9
8
7
6
