York AYK 550 User Manual page 108

AYK550-UH User's Manual
Group 35: Motor Temp Meas
This group defines the detection and reporting for a particular potential fault – motor
overheating, as detected by a temperature sensor. Typical connections are defined
below.
One Sensor
Motor
T
Three Sensors
T
Warning! IEC 60664 requires double or reinforced insulation between live parts
and the surface of accessible parts of electrical equipment which are either
non-conductive or conductive but not connected to the protective earth.
To fulfil the insulation requirement, connect a thermistor (and other similar
components) to the drive's control terminals using any of these alternatives:
• Separate the thermistor from live parts of the motor with double reinforced
insulation.
• Protect all circuits connected to the drive's digital and analog inputs. Protect
against contact, and insulate from other low voltage circuits with basic insulation
(rated for the same voltage level as the drive's main circuit).
• Use an external thermistor relay. The relay insulation must be rated for the same
voltage level as the drive's main circuit.
10 nF
Motor
T
T
10 nF
1
AI
AGND
1
AO
AGND
1
AI
AGND
1
AO
AGND
104
Start-Up