Implementing A Motor Temperature Sensor Connection - ABB ACS580-07 Hardware Manual

70 Guidelines for planning the electrical installation

Implementing a motor temperature sensor connection

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 connect a motor temperature sensor and other similar components to the drive, you
have four alternatives:
1. If there is double or reinforced insulation between the sensor and the live parts of the
motor, you can connect the sensor directly to the inputs of the drive.
2. If there is basic insulation between the sensor and the live parts of the motor, you can
connect the sensor to the inputs of the drive if all circuits connected to the drive's digital
and analog inputs (typically extra-low voltage circuits) are protected against contact
and insulated with basic insulation from other low-voltage circuits. The insulation must
be rated for the same voltage level as the drive main circuit. Note that extra-low voltage
circuits (such as 24 V DC) typically do not meet these requirements.
3. You can connect the sensor to an extension module with reinforced insulation (eg,
CMOD-02) between the sensor connector and the other connectors of the module. See
the table below for the sensor insulation requirement. For sensor connection to the
extension module, see its manual.
4. You can connect a sensor to an external thermistor relay the insulation of which is rated
for the main circuit voltage of the drive.
See sections
• AI1 and AI2 as Pt100, Pt1000, Ni1000, KTY83 and KTY84 sensor inputs (X1) (page 101)
• CMOD-02 multifunction extension module (external 24 V AC/DC and isolated PTC
interface
• CPTC-02 ATEX-certified thermistor module (external 24 V AC/DC and isolated PTC
interface.
This table shows what temperature sensor types you can connect to the drive I/O extension
modules as well as the insulation requirement for the sensor.
Extension module
Type
CMOD-02 Reinforced insulation between the sensor
connector and the other connectors of the
CPTC-02
module (including drive control unit connect-
or). –> No special requirements for the
thermistor insulation level.
(The drive control unit is PELV compatible
also when the module and a thermistor
protection circuit are installed.)
Insulation
Temperature sensor type
PTC KTY Pt100, Pt1000
X -
X -
-
-