Signal Description - Agilent Technologies TPS-compact Mode D'emploi

Pin N.
15

Signal Description

START/STOP: input signal to start or stop the pump. Without the
supplied cover connector the turbomolecular pump automatically
starts, if you want to stop the turbo-pump from outside, you have to
connect the START/STOP (+) signal to the +24 Vdc pin and the
START/STOP (-) signal to the GROUND pin (this is the default
configuration of the cover connector).
INTERLOCK: input signal to control the pump rotation. With the
supplied cover connector the IN-TERLOCK (+) signal is connected to
the +24 Vdc pin and the INTERLOCK (-) signal to the GROUND pin; in
this condition the pump is stopped.
SOFT START: this input is used to provide a "soft start" to the pump;
in this condition the ramp-up time could be up to 20 min.
SPEED SETTING: PWM input signal to set the pump speed. The
PWM signal characteristics must be the following:
▪
▪
▪
▪
TPS-compact User Manual / 87-901-010-01 (H)
Signal name
GROUND

PROGRAMMABLE ANALOG SIGNAL (-)

frequency: 100 Hz +/-20 %
amplitude: 24 V max
duty cycle range: from 25 % to 75 %
corresponding to a pump speed from 1100Hz to 1167Hz (see the
following diagram).
Technical Information
Interconnections
Input/Output
OUT
279/314
17