ABB ACS580 Firmware Manual page 132

128 Program features
Insulation
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 this requirement, connect a thermistor 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
When CMOD-02 multifunction module is used, it provides sufficient insulation.
Temperature monitoring using PTC sensors
PTC sensors are connected through a CMOD-02 multifunction module (see chapter
Optional I/O extension modules, section CMOD-02 multifunction extension module
(external 24 V AC/DC and isolated PTC interface) in the Hardware manual of the
drive).
1)
1)
One or 3...6 PTC thermistors connected in series.
The resistance of the PTC sensor increases when its temperature rises. The
increasing resistance of the sensor decreases the voltage at the input, and eventually
its state switches from 1 to 0, indicating overtemperature.
PTC IN
60
PTC IN
61
CMOD-02