16
Connection "remote"
6.2.2
Inputs
The digital inputs at connection "
remote
" are used to connect various functions of the
electronic drive unit. Functions are assigned to the inputs DI1 - DI2 ex factory. These can
be configured via interface RS-485 and the Pfeiffer Vacuum parameter set.
DI1 (Enable venting) / Pin 2
V+ :
Venting is enabled (venting according to venting mode)
open: Venting locked (no venting is performed)
DI Motor pump / Pin 3
After Pin 4 (pumping station) is activated and the electronic drive unit successfully com-
pletes the self-test, the turbopump is placed into operation. During operation, the tur-
bopump can be switched off and on again, while the pumping station remains switched
on. The turbopump is not vented thereby.
V+ :
Turbopump motor on
open: Turbopump motor off
DI Pumping station / Pin 4
Connected pumping station components (e.g. backing pump, venting valve, air cooling
unit) are triggered and, with Pin 3 (motor) simultaneously activated, the turbopump is
placed in operation. Any ongoing error messages are reset when their cause has been
eliminated.
V+ :
Malfunction acknowledgement and pumping station on
open: Pumping station off
DI Standby / Pin 5
In standby mode, the turbopump operates at a specified rotor speed < nominal rotation
speed. Factory setting and recommended operation are 66.7 % of the nominal rotation
speed.
V+ :
Standby activated
open: Standby off, operation at nominal rotation speed
DI2 (Heating) / Pin 6
V+ :
Heating on
open: Heating off
DI3 (Sealing gas) / Pin 10
V+ :
Sealing gas valve open
open: Sealing gas valve closed
DI Error acknowledgement / Pin 13
V+ :
Reset ongoing error messages when cause has been eliminated with a pulse of
min. 500 ms duration.
open: Inactive
DI Remote priority / Pin 14
V+ :
The connection "
remote
" has operation priority over all other digital inputs.
open: Remote priority inactive
