Edwards nXDS Series User Manual

© Edwards Limited 2017. All rights reserved. Page 25
Edwards and the Edwards logo are trademarks of Edwards Limited.
Operation
A735-01-880 Issue C
Figure 12 - Analogue speed control
Note: Voltages below 6.7 V will result in a clamped speed of 67% of full speed.
4.4.1 Hardware configuration
Using the 15-way D-type connector (Figure 1, item 7) apply the following signal configurations to enable the Analogue
Speed Control source (refer to Table 11):
Connect the Analogue Speed Enable control input (pin 1) to the 0 V Control Reference (pin 2).
Connect a suitably calibrated analogue voltage source (0 to +10 V), for example, (DAC) to the analogue speed control
input (pin 9). Alternatively connect the output of a potentiometer referenced to the pump reference voltage (pin 11)
to the analogue speed control input (pin 9). Refer to Figure 11. The 0 V rail of the external voltage source must be
connected to the 0 V Control Reference (pin 2) of the pump controller.
4.4.2 Operation
 A +10 V input equates to a mechanical running speed which is equal to: 100% of the default run speed, that
is, 30 Hz.
 The minimum running speed provided by the Analogue Speed control source, is clamped at the minimum
Standby Speed Setting, that is, approximately 67% of the default run speed of 20 Hz.
 The maximum running speed provided by the Analogue Speed control source is clamped by the maximum
Standby Speed Setting, that is, 100% of the default run speed of 30 Hz.

Edwards nXDS Series Specifications

General

Brand	Edwards
Model	nXDS Series
Category	Water Pump
Language	English