Instructions for Use
Description of Pin Functions
Pin#1: This pin can be used to control the speed of the pump by applying an analog
voltage between 1 and either of the signal ground pins. The speed varies
continuously from full speed of 1900 RPM at 10 VDC to 1350 RPM at 6.9 VDC. The
pump runs at 1350 RPM for all voltages between 1.0 and 6.9 V. For voltages below
1 V or without an input the pump runs at 1800 RPM (factory default setting). Over
speed is not provided. This pin has an input impedance of 10 Kohms.
Pin#2: This is a TTL compatible logic input. Either a switch closure to signal ground,
or a logic LO (referenced to signal ground) on this pin allows the pump to run. An
open or logic HI turns the pump OFF. An internal pull-up resistor to +5 V is provided.
Note: that the slide switch MUST be in the 0 position when using this input.
Pin#5 and Pin#9: These two pins are connected to signal ground.
Pin#7: This pin outputs a 10 VDC signal used when using a potentiometer for the
speed control. When connecting the top of a potentiometer to this pin, the wiper to
pin#1, and the other side of the potentiometer to one of the ground pins, you can
easily vary the speed of the pump. A 5 Kohm potentiometer is recommended.
Pin#8: Do not make any connection to this pin.
Pin#9: Shell: Chassis ground. (The shell is NOT connected to the signal ground pins).
Figure 27 RPM. vs. 0-10 V Speed Control Signal
Agilent IDP-10 Dry Scroll Vacuum Pump User Manual
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