PTC Thermistor Connection
Figure 6.2 PTC profile
Using a digital input and 10 V as power supply:
Example: The adjustable frequency drive trips when the
motor temperature is too high.
Parameter set-up:
Set
parameter 1-90 Motor Thermal Protection
to
[2]
Thermistor Trip
Set
parameter 1-93 Thermistor Source
to
[6] Digital Input
PTC / Thermistor
R
OFF
ON
<800 Ω
+10V
130BA152.10
>2.7 kΩ
12 13
18
37
32
27
19
29
33 20
55
50
39 42
53 54
Figure 6.3 Example with Digital Input and 10 V Power Supply
Using an analog input and 10 V as power supply:
Example: The adjustable frequency drive trips when the
motor temperature is too high.
Parameter set-up:
Set
parameter 1-90 Motor Thermal Protection
to
[2]
Thermistor Trip
Set
parameter 1-93 Thermistor Source
to
[2] Analog Input 54
Figure 6.4 Example with Analog Input and 10 V Power Supply
Input
Digital/analog
Supply Voltage
[V]
Threshold
Cut-out Values
Digital
10
< 800
Ω
- > 2.7 k
Ω
Analog
10
< 3.0 k
Ω
- > 3.0 k
Ω
Table 6.2 Threshold Cut-out Values for
and
NOTICE!
Check that the selected supply voltage follows the
specification of the thermistor element.
Programming
Instruction Manual
MG37A222
Danfoss A/S © Rev. 2014-02-07 All rights reserved.
57
6
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Summary of Contents for VLT AutomationDrive FC 302
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