1…3 PTC sensors1
Analog input. Set the analog input type to V (volt) in parameter group 12 Standard AI. Define the temper-
ature sensor type, signal source, etc. with parameters 35.11. to 35.24. For the sensor type, select: PTC
analog I/O.
2
Analog output. Select the Excitation mode for the analog output in parameter group 13 Standard AO.
3
PTC connection 2
If no analog output is available for the PTC connection, it is possible to use a voltage divider
connection. 1...3 PTC sensors are connected in series with 10 V reference and digital and
analog inputs. The voltage over the digital input internal resistance varies depending on the
PTC resistance. The temperature measurement function reads the digital input voltage via
the analog input and calculates the PTC resistance.
T
T T
DIn
AIn
+10 V
1
2
3
DGND
DCOM
1…3 PTC sensors1
Digital input and analog input. Set the analog input type to V (volt) in parameter group 12 Standard AI.
Define the temperature sensor type, signal source, etc. with parameters 35.11. to 35.24. For the sensor
type, select: PTC AI/DI Voltage Divider tree. Make sure that the digital input is not configured to any other
use by parameters.
2
10 V reference voltage3
AI1 and AI2 as Pt100, Pt1000, Ni1000, KTY83 and KTY84 sensor inputs
WARNING!
IEC 60664 and IEC 61800-5-1 require double or reinforced insulation between
live parts and accessible parts when:
• the accessible parts are not conductive, or
• the accessible parts are conductive, but not connected to the protective earth.
Obey this requirement when you plan the connection of the motor temperature
sensor to the drive.
82 Electrical installation – North America
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