10
Connection "remote"
Outputs The digital outputs at the connection "remote" can be loaded with a maximum of
24 V / 50 mA per output. Outputs DO1 - DO2 are assigned functions in the factory.
These can be configured via interface RS485 and the Pfeiffer Vacuum parameter
set.
DO1 (Rotation speed switch point attained) / Pin 8
Active high after the rotation speed switch point is attained. Rotation speed switch
point 1 is factory-set to 80% of the nominal rotation speed. It can, for example, be
used for a "pump operational" message.
DO2 (No errors) / Pin 9
When the supply voltage for the TC has been established, digital output DO2 per-
manently outputs 24 VDC which means "no errors". Active low in case of error (col-
lective error message).
DO Remote priority active / Pin 23
Active high: The connection "remote" takes priority over any other control panels
connected to the TC (e.g. RS485). With active low, the connection "remote" is ig-
nored.
AO1 Analog output 0-10 V DC / Pin 12
A rotation-speed-proportional voltage (0-10 VDC equals 0 - 100 % x f
Nominal
) can be
picked up via the analog output (load R ≥ 10 kΩ). Additional functions (optionally
current/power) can be assigned to the analog output via DCU, HPU or PC.
Relay contacts Relay 1 / Pin 15, Pin 16 and Pin 17
The contact between Pin 16 and Pin 15 is closed when the rotation speed switch
point is underrun; relay 1 is inactive. The contact between Pin 16 and Pin 17 is
closed when the rotation speed switch point is attained; relay 1 is active.
Relay 2 / Pin 18, Pin 19 and Pin 20
The contact between Pin 19 and Pin 18 is closed when operation is malfunction
free; relay 2 is inactive. The contact between Pin 19 and Pin 20 is closed when a
malfunction is present; relay 2 is active.
Relay 3 / Pin 21 and Pin 22
The contact between Pin 21 and Pin 22 is closed when no warning messages are
active; relay 3 is inactive. The contact between Pin 21 and Pin 22 is open when a
warning message is present; relay 3 is active.
RS485 One Pfeiffer Vacuum display and control panel (DCU or HPU) or an external PC can
be connected respectively to the electronic drive unit via Pin 24 and Pin 25 of the
connection "remote" on the electronic drive unit.
Establish the connections according to the specification of the interface RS485.
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