The connection of a Pfeiffer Vacuum display and control panel permits the controlling of the vacuum
pump via the parameters fixed in the electronic drive unit.
Automatic start
After bypassing the contacts at pins 2, 7, 5 on the connecting plug or when using a con-
necting cable with respective bridges and applying the supply voltage, the vacuum pump
starts up immediately.
Pfeiffer Vacuum therefore recommends switching on the voltage supply immediately before
operation.
Operate without control unit
1. Connect the respective connecting cable with bridges to the power supply plug of the electronic
drive unit.
2. Provide the current supply for the power supply pack.
3. Switch on the power supply pack with switch S1.
After applying the operating voltage, the vacuum pump carries out a self-test to check the supply volt-
age. After a successfully completed self-test, the vacuum pump starts.
Operate via the external control
► Connect the remote control via the 15-pin D-Sub socket.
The control is carried out by means of "PLC level".
Operate with peripheral devices DCU or HPU.
1. When handling the Pfeiffer Vacuum display and control unit, observe the associated operating in-
structions:
– "DCU" operating instructions available from the
– "HPU" operating instructions available from the
2. Connect the respective peripheral device to the 15-pin D-Sub socket.
3. Switch on the power supply pack with switch S1 or on the peripheral device.
4. Make the desired settings via the RS-485 using the peripheral device.
8.4.1 Speed actuator operation
The set rotation speed is selected via the parameter
[P:707]
in the range
30 to 134%
of the set rotation
speed. If the speed is higher than the set rotation speed (> 100%), an increased pump wear is possible.
The rotation speed setting mode has priority over the stand-by mode.
Permissible rotation speed range of the vacuum pump
Parameterization in rotation speed setting mode is subject to the permissible rotation speed
range of the respective vacuum pump. The electronic drive unit regulates automatically to
the next valid value.
Set the rotation speed setting mode
1. Set the parameter
[P:707]
to the required value in %.
2. Set the parameter
[P:026]
to "1".
3. Check the set rotation speed (parameter
[P:308]
or
[P:397]
).
8.4.2 Standby mode
Pfeiffer Vacuum recommends standby mode for during process and production stops. With active
stand-by mode, the electronic drive unit reduces the speed of the vacuum pump in the range of
30 to
100%
of the nominal speed. The factory setting is 66.7% of the nominal speed.
Setting the related parameters
1. Set the parameter
[P:717]
to the required value in %.
2. Set the parameter
[P:026]
to "0".
3. Set the parameter
[P:002]
to "1".
4. Check the set rotation speed (parameter
[P:308]
or
[P:397]
).
Operation
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