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Some examples of different parameter settings:
1)
0-10 volts corresponds to 0-1800 RPM.
HI to 1800, LO to 0, SCF0 to 1800, SCd0 to 0.
2)
0-10 volts corresponds to 0-2500 bottles/hour
HI to 2500, LO to 0, SCF0 to 2500, SCd0 to 0.
3)
0-10 volts corresponds to 0-900 RPM
HI to 900, LO to 0, SCF0 to 900, SCd0 to 0.
A2.4
ANALOG FOLLOWER/DIGITAL RATIO, MODE 2
A2.4.1 EXTERNAL ANALOG INPUT
An isolated analog 0-10 volt or 4-20 mA signal, directly proportional to the desired motor speed, is
required. The signal must be isolated and must not exceed 14 volts.
The signal is fed into the DS9000A via the DB9 connector on the rear. Connection points are as
shown in Section A2.2.2.
A2.4.2 SPEED POTENTIOMETER INPUT
Instead of an external signal, a speed potentiometer may be used to provide an analog speed reference.
Connection points, as shown in section A2.2.1, for the potentiometer are as shown:
Clockwise terminal -
Wiper (Center terminal) -
Counter-clockwise terminal - PIN 3 (COMMON)
The Speed potentiometer resistance value should be 2K to 10K, 2 watt. A 10 turn potentiometer is
highly recommended due to the fine resolution and high accuracy of the DS9000A.
A2.4.3 MODE 2 PARAMETERS
Parameters used in this mode include the following:
PS-1 through PS4 – Preset Ratios, user set by DS9000A keypad.
PS-1 – PS-4 may be user-set to different ratios, depending on the desired motor speed. For example, 0-
10 volts corresponds to 0 to 1800 RPM with PS-1 set to 1.000. With PS-1 set to 0.9000, the +10 VDC
will produce a 90% ratio of the full speed, or 1620 RPM. PS-1 through PS-4 are selected by contact
closures to the terminal strip, TB1, as shown in the DS9000 I.M., Figure 1. Without the addition of
terminal strip contacts, PS-1 will be the default display upon power-up.
LO – Sets the LOWEST RATIO that may be entered by keypad.
LO may be set from 0 to the value of HI. Default setting is 0.000.
HI – Sets the HIGHEST RATIO that may be entered by keypad.
HI may be set from LO to the value of 9.999. Default setting is 1.800.
FEd0 – Sets the FEEDBACK RATE of the controlled motor.
FEd0 is set for MAXIMUM FEEDBACK FREQUENCY in Hertz
((RPM x PPR)/60) divided by 30. See the DSS9000 I.M. Section 4.1.1.
A8
PIN 9 (+10VDC)
PIN 4 (REFERENCE)
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