16
Power
Frequency
D
B
C
A
D-C = Gas mode «0»
B-A = Gas mode «1»
Run up
fnom
Gas type characteristic line
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 3.12.,
point 5 ”Reset”).
Sealing gas valve (optinal)
Optionally a valve (e.g. TVF 005, accessory) for sealing gas
inlet can be contolled via this input. More information on
request.
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”).
Switching Outputs
The 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.
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
The connection of a relay is made between pin 10 (mass) and
the respective switching output pin 8 or pin 9 (see section
3.13. “Connections Diagram”).
Analog Output
A rotation speed proportional voltage
(0 - 10 VDC correspond to 0 - 100%*fend) can be tapped via
the analog output (load
≥
10 k
Ω
).
Additional functions (power, current) can be assigned to the
analog output via a DCU or Serial Interface RS 485.
4.4. Gas Type Dependent Operations
Water cooling is required if the pumps are to be
operated with gas load.
Where high level gas loads and rotation speeds are involved,
the resulting friction subjects the rotor to the effect of great
heat. To avoid over-heating, a power rotation speed charac-
teristic line is implemented in the TC 600; this ensures that
where maximum gas loads are involved, the pump will ope-
rate at any rotation speed without the danger of damage
arising. The maximum power is dependent on the type of gas.
Two characteristic lines are available for any type of gas in
order to fully exploit the power potential of the pump:
➡
Set the applicable gas mode on the TC 600 via the DCU,
HPU or PC.
– "Gas-Mode 0" for gases with molecular mass
≥
40 (e.g. Ar);
– "Gas-Mode 1" for all lighter gases.
– FFa
ac
ctto
orryy sse
ettttiin
ng
g: "Gas-Mode 0"
Pumping gases with molecular mass
≥
40 with
the incorrect gas mode can cause damage to
the pump. Before pumping such gas types
please contact the manufacturer.
WARNING
CAUTION
