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<strong>Grundfos</strong> E-<strong>pumps</strong><br />
10<br />
Analog sensor inputs 1 and 2<br />
The analog sensor inputs 1 and 2 are standardized<br />
inputs for measuring all types of analog parameters.<br />
Sensor input 1 is the only sensor input set up for<br />
closed-loop operation. The input will be used as the<br />
sensor feedback input.<br />
Sensor input 2 is referred to as the secondary sensor.<br />
Extended<br />
module<br />
16: GND<br />
15: + 24 V<br />
14: Sensor input 2<br />
9: GND<br />
8: + 24 V<br />
7: Sensor input 1<br />
Description<br />
The analog sensors 1 and 2 enable several functions.<br />
• When the secondary sensor is set up as an input to<br />
the "limit exceeded" functions 1 and 2, defined<br />
outputs or warnings or alarms can be given when<br />
system parameters are outside defined system limits.<br />
• Connecting a flow sensor.<br />
When sensor input 2 is set up with a flow sensor,<br />
the measured value can be used as input to the<br />
proportional-pressure function. The flow displayed<br />
in the R100 will be the measured flow instead of the<br />
estimated flow.<br />
The flow measurement can also be used in the<br />
low-flow stop function to detect low flow instead of<br />
estimating the flow by lowering the speed of the<br />
pump.<br />
• Sensor reading via the R100 and PC Tool<br />
E-products.<br />
When sensors are set up. the user can get a status<br />
reading via the R100 and PC Tool E-products.<br />
Advanced use of MLE motors<br />
Fig. 82 Sensor inputs 1 and 2 connections<br />
Purpose and benefits<br />
The analog sensor inputs 1 and 2 provide these<br />
benefits:<br />
• Sensor input 1 can be feedback input for the built-in<br />
PI controller.<br />
• It is possible to monitor secondary parameters in<br />
the process, e.g. flow or liquid temperature.<br />
• The secondary sensor can be set up as a redundant<br />
sensor.<br />
• The sensors can give input to the "limit exceeded"<br />
functions 1 and 2.<br />
• Status readings of the inputs are available via the<br />
R100 and PC Tool E-products.<br />
Applications<br />
Analog sensor inputs 1 and 2 can be used in applications<br />
with a need for monitoring essential parameters.<br />
This function is available in these pump sizes:<br />
Single-phase <strong>pumps</strong><br />
2-pole [Hp]<br />
4-pole [Hp]<br />
0.50 - 1.5 0.33 - 1.0<br />
●<br />
●<br />
1 analog input 1 analog input<br />
Three-phase <strong>pumps</strong><br />
2-pole [Hp]<br />
1.0 - 10 15 - 30<br />
●<br />
●<br />
1 analog input 2 analog inputs<br />
TM03 9214 3607<br />
Analog output<br />
Analog output<br />
The analog output (0-10 mA) can be set via the PC<br />
Tool to one of these indications:<br />
• feedback value<br />
• speed<br />
• frequency<br />
• motor current<br />
• external setpoint input<br />
• limit exceeded.<br />
The analog output is default set to not active.<br />
Feedback value<br />
The output signal is a function of the actual feedback<br />
sensor.<br />
Speed<br />
The output signal is a function of the actual pump<br />
speed.<br />
Frequency<br />
The output signal is a function of the actual frequency.<br />
Motor current<br />
The output signal is a function of the actual motor<br />
current.<br />
External setpoint input<br />
The output signal is a function of the external setpoint<br />
input.<br />
Limit exceeded<br />
The output signal indicates whether the limit is<br />
exceeded:<br />
• Minimum output = limit is not exceeded.<br />
• Maximum output = limit is exceeded.<br />
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