Configuring an additional transducer feedback
An additional transducer can be added to the system to work with closed loop control or
for external monitoring. The additional transducer can be either a voltage output or
current output transducer. The additional transducer can be added to the unused analog
input (AI 53 for current type only or AI 54 for current type or voltage type). The wiring
below shows the required connections for an additional transducer on AI 54.
A common use of two pressure transducer feedback signals is to take the difference
between the signals to create a differential pressure transducer. To implement a
differential pressure transducer with 2 pressure transducers, set [20-20] Feedback
Function to Difference. The controller will calculate the feedback value as [20-00]
Feedback 1 Source – [20-03] Feedback 2 Source. Be sure to set all unused feedback
sources to No Function (parameters [20-00], [20-03] or [20-06]). The parameter listing that
follows shows how to configure the additional transducer.
• Analog inputs can be configured using the Start-Up Genie.
• Be sure to properly set the analog input configuration switch prior to using the analog
input. Refer to the Analog input configuration (Switches A53 and A54) for details.
Figure 77: Connections for adding 4–20 mA transducer feedback to AI 54
Figure 78: Connections for adding 0–10 V transducer feedback to AI 54
In order to set up the controller for closed loop control based on the feedback from an
external transducer, set the following parameters:
Table 11: Parameter settings to enable an additional transducer on AI 54
Parameter Number
Parameter Description
Set To
[6-24]*
Terminal 54 Low Ref./Feedb.Value
Minimum transducer feedback value.
For example, for a 0-300psi
transducer, set to 0.
[6-25]*
Terminal 54 High Ref./Feedb.Value
Maximum transducer feedback
value. For example, for a 300psi
transducer, set to 300.
[6-27]*
Terminal 54 Sensor Fault (North
America) / Live Zero (International)
Enabled
5 Electrical Installation
68
Aquavar
®
Intelligent Pump Controller - 150 HP to 600 HP INSTRUCTION MANUAL
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