15
Pumping Station
Any connected pumping station components are started up
(e.g. backing pump, venting valve, air cooling) and with simul-
taneous activation of the input ”motor, turbopump” the
turbopump is set in operation once the self test has been
successfully completed (duration approximately 10 seconds).
Heating/Reset
H
He
ea
attiin
ng
g ((o
op
pttiio
on
na
all))
Once the rotation speed switchpoint is attained the heating
unit is switched on; when the rotation speed switchpoint is
fallen below the heating unit is switched off.
Reset
The heating input has two functions (please see Section 3.10.,
point 5 ”Reset”).
Standby
The pump can be operated optionally at 66% of its nominal
rotation speed (standby ON) or at its nominal rotation speed
(standby OFF).
Rotation Speed Setting Mode Via Input PWM
The supply of pulse width modulated signals (PWM) with a
ground frequency of 100 Hz ±20% with an amplitude of
maximum 24 V and a key ratio of 25-75% enables the rotation
speed to be set in the range 20-100% of the nominal rotation
speed.
If no signal is present the pump accelerates up to its final
rotation speed.
A PWM adapter box for rotation speed setting operations for
the turbopump is available as an option (please see
”Accessories”).
T
0
U
20%*f
100%*f
end
max. +33V
min. +13V
max. +7V
min. -33V
T
T
PWM
*25%
*75%
T
= 10ms (1±20%)
f
=100Hz (1±20%)
end
PWM
PWM
PWM
Switching Outputs
Switching outputs 1 and 2 can be loaded with a maximum
24 V / 50 mA per output. The following functions are assigned
to the switching outputs:
S
Sw
wiittc
ch
hiin
ng
g o
ou
uttp
pu
utt 11: Active high when the rotation speed
switchpoint is attained. The switchpoint
for the turbopump is set at 80% of the
nominal rotation speed. It can be used,
for example, for a message ”pump
ready to operate”.
S
Sw
wiittc
ch
hiin
ng
g o
ou
uttp
pu
utt 22: Active low with a malfunction -
collective malfunction message.
The connection of a relay is made between pin 10 (mass) and
the respective switching output pin 8 or pin 9 (see Section
3.12. Connections Diagram).
