ABB ACS880-04F, Hardware Manual, Page: 75 / 172

Guidelines for planning the electrical installation 75
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 basic insulation (eg, FAIO-
01) or reinforced insulation (eg, FPTC-xx) 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.

Drive I/O, I/O extension and encoder interface modules
See:
•
section AI1 and AI2 as Pt100, Pt1000, PTC and KTY84 sensor inputs (XAI, XAO) on
page 91 ,
•
section DI6 (XDI:6) as PTC sensor input on page 92 ,
•
FPTC-01 thermistor protection module (L536) for ACS880 drives user’s
manual
(3AXD50000027750 [English]),
•
FPTC-02 ATEX-certified thermistor protection module Ex II (2) GD (option
+L537+Q971) for ACS880 drives user’s manual
(3AXD50000027782 [English]).
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 Temperature sensor
type
Temperature sensor
insulation requirement
Type Insulation/Isolation PTC KTY Pt100,
Pt1000
FIO-11 Galvanic isolation between sensor
connector and other connectors
(including drive control unit connector) - X X Reinforced insulation
FEN-xx Galvanic isolation between sensor
connector and other connectors
(including drive control unit connector) X X - Reinforced insulation
FAIO-01 Basic insulation between sensor
connector and drive control unit
connector. No insulation between
sensor connector and other IO
connectors.
X X X Basic insulation. Connectors
of extension module other
than sensor connector must
be left unconnected.