![ABB ACS310 User Manual Download Page 229](http://html.mh-extra.com/html/abb/acs310/acs310_user-manual_2963229.webp)
Actual signals and parameters 229
PTC
The function is active. The temperature is supervised using
one PTC sensor. Analog output AO feeds constant current
through the sensor. The resistance of the sensor increases
sharply as the motor temperature rises over the PTC
reference temperature (Tref), as does the voltage over the
resistor. The temperature measurement function reads the
voltage through analog input AI1/2 and converts it into
ohms. The figure below shows typical PTC sensor
resistance values as a function of the motor operating
temperature.
4
THERM(0)
The function is active. Motor temperature is monitored using
a PTC sensor (see selection
) connected to drive
through a normally closed thermistor relay connected to a
digital input. 0 = motor overtemperature.
5
THERM(1)
The function is active. Motor temperature is monitored using
a PTC sensor (see selection
) connected to drive
through a normally open thermistor relay connected to a
digital input. 1 = motor overtemperature.
6
3502 INPUT
SELECTION
Selects the source for the motor temperature measurement
signal.
AI1
Analog input AI1. Used when Pt100 or PTC sensor is
selected for the temperature measurement.
1
AI2
Analog input AI2. Used when Pt100 or PTC sensor is
selected for the temperature measurement
2
DI1
Digital input DI1. Used when parameter
value is set to
3
DI2
Digital input DI2. Used when parameter
value is set to
4
DI3
Digital input DI3. Used when parameter
value is set to
5
DI4
Digital input DI4. Used when parameter
value is set to
.
6
All parameters
No.
Name/Value
Description
Def/FbEq
100
550
1330
4000
ohm
T
Temperature
Resistance
Normal
0…1.5 kohm
Excessive
> 4 kohm
Aotewell Ltd
www.aotewell.com
Industry Automation
HongKong|UK|China
+86-755-8660-6182