Thermistor Connection - Eaton PowerXL DB1 Installation Manual

3.5.3 Thermistor connection

As a way of protecting against thermal overload in the motor, motor thermis-
tors and motor temperature switches (Thermo-Click) can be connected to
control signal terminal 4 (DI3 = digital input 3)
In parameter P-15, setting EXTFLT (external fault) must be chosen for DI3
and in parameter P-47, value 6 (Ptc-th) must be enabled in order to do this.
1 2 3 4 5 6 7 8 9 10 11
T1 T2 U V W PE
M 3 ∼

ϑ
PTC type
≧ 2.5 kΩ trip level
≦ 1.9 kΩ Reset
Figure 28: Thermistor connection
Thermistors and temperature switches must be PTC-based (PTC characteris-
tics; positive temperature coefficient).
These are triggered at a resistance value of approx. 2.5 kΩ - 3 kΩ, and a reset
is triggered at approx. 1.9 kΩ - 1 kΩ.
DB1 Variable Frequency Drives 09/17 MN040031EN www.eaton.com
PES
ϑ
Thermoclick sensor
3 Installation
3.5 Electrical Installation
61