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<strong>Grundfos</strong> E-<strong>pumps</strong><br />
10<br />
Temperature sensors 1 and 2<br />
One or two Pt100 temperatures sensors may be<br />
connected to the input terminals 17, 18, 19, and 20.<br />
Extended<br />
module<br />
17: Pt100 A<br />
18: Pt100 A<br />
19: Pt100 B<br />
20: Pt100 B<br />
Applications<br />
The temperature inputs can be used in all applications<br />
where temperatures in the system or in the motor need<br />
to be monitored.<br />
Note: The temperature sensor inputs are available on<br />
all MLE motors.<br />
This function is available in these pump sizes:<br />
2-pole<br />
[Hp]<br />
Single-phase <strong>pumps</strong><br />
4-pole<br />
[Hp]<br />
0.50 - 1.5 0.33 - 1.0<br />
- -<br />
Advanced use of MLE motors<br />
Fig. 79 Temperature sensor connections in the extended<br />
functional module<br />
Purpose and benefits<br />
The temperature sensor inputs 1 and 2 provide these<br />
benefits:<br />
• The temperature sensor inputs can be used as input<br />
to the "limit exceeded" functions 1 and 2.<br />
• In combination with the bearing monitoring function,<br />
the temperature sensors provide optimum<br />
monitoring of the motor bearings.<br />
• A bearing warning or a bearing alarm can be<br />
indicated as the motor bearing temperature is<br />
measured.<br />
• Status readings of the measured temperatures are<br />
available via the R100, PC Tool E-products and bus.<br />
• The function has a built-in signal fault detection<br />
if the temperature sensors fail or a conductor is<br />
broken.<br />
TM03 9191 3507<br />
Three-phase <strong>pumps</strong><br />
2-pole<br />
[Hp]<br />
1.0 - 10 15 - 30<br />
- ●<br />
Description<br />
The temperature sensor inputs enable several<br />
functions.<br />
• The temperature sensor inputs 1 and 2 can be used<br />
as input to the "limit exceeded" functions 1 and 2.<br />
If a limit is exceeded, this will be indicated. The<br />
indication will be in the form of outputs (relay) or<br />
alarms/warnings set up/defined in the "limit<br />
exceeded" functions 1 and 2.<br />
• The temperature sensor inputs 1 and 2 can be set<br />
up to measure bearing temperature. The measured<br />
values of temperature sensor 1 and 2 are used in<br />
the calculation of relubrication intervals.<br />
Additionally, the measured value can activate the<br />
indication of a bearing warning or a bearing alarm.<br />
In case of high bearing temperature, a warning or<br />
an alarm can be logged and force the pump to stop.<br />
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