DI1 (release venting)/pin 2
V+: Enable venting (venting as per venting mode)
open: Venting blocked (no venting occurs)
DI motor vacuum pump/pin 3
The turbopump starts up with activation of pin 4 (pumping station) and successful self-testing of the
electronic drive unit. The turbopump can be switched off and switched on again during operation with
the pumping station still activated. This will not initiate a venting action.
V+: Turbopump motor on
open: Turbopump motor off
DI pumping station/pin 4
Control of connected pumping station components (e.g. backing pump valve, air cooling) and start-up of
the turbopump with simultaneously activated pin 3 (motor). Any pending error messages are reset by
eliminating the cause.
V+: Pumping station on
open: Pumping station off
DI stand-by/pin 5
In stand-by mode, the turbopump operates at a specified rotor speed < nominal rotation speed. The fac-
tory setting and recommended operation is 66.7 % of the nominal rotation speed.
V+: Stand-by activated
open: Stand-by off, operation at nominal rotation speed
DI2 (heating)/pin 6
V+: Heating on
open: Heating off
DI malfunction acknowledgment/pin 13
V+: Resetting of pending error messages when cause has been eliminated with a pulse of min.
500 ms duration
open: Inactive
DI remote priority/pin 14
V+: "REMOTE" connection has control priority over all other digital inputs.
● Change activated individual functions exclusively via "REMOTE"
● Deactivate individual functions via the keyboard or interface
open: "REMOTE" priority inactive
AI rotation speed control mode/pin 7 and pin 26
The analog input serves as a rotation speed setpoint for the turbopump. An input signal of 2 to 10 V
between Al+ (pin 7) and GND (pin 26) corresponds to a rotation speed within the range of 20 to 100 %
of the nominal rotation speed. If the input is open or signals are below 2 V, the turbopump accelerates
to the nominal rotation speed.
Fig. 7: Rotation speed control mode pin 7 and pin 26
Installation
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