ABB ACS880-37LC, Hardware Manual

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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.
Alternative: You can connect the sensor with a basic insulation to the analog/digital
input(s) of the drive if you do not connect any other external control circuits to drive
digital and analog inputs.
3. You can connect the sensor to the drive via an option module. The sensor and the
module must form a reinforced insulation between the motor live parts and the drive
control unit. See
Connecting motor temperature sensor to the drive via an option
module (page 72) .
4. You can connect a sensor to a digital input of the drive via an external relay. The
insulation of the relay of must be rated for the main circuit voltage of the motor. See
Connection of motor temperature sensor to the drive via a relay (page 76) .
￭ Connecting motor temperature sensor to the drive via an option module
This table shows:
• the option module types that you can use for the motor temperature sensor connection
• the insulation or isolation level that each option module forms between its temperature
sensor connector and other connectors
• the temperature sensor types that you can connect to each option module
• the temperature sensor insulation requirement in order to form, together with the
insulation of the option module, a reinforced insulation between the motor live parts and
the drive control unit.
Temperature sensor insulation
requirement
Temperature sensor
type
Option module
Pt100,
Pt1000
KTY PTC Insulation/Isolation Type
Reinforced insulation x x - Galvanic isolation between sensor
connector and other connectors (in-
cluding drive control unit connector) FIO-11
Reinforced insulation - x x Galvanic isolation between sensor
connector and other connectors (in-
cluding drive control unit connector) FEN-xx
Basic insulation. Connectors of op-
tion module other than sensor con-
nector must be left unconnected.
x x x Basic insulation between sensor
connector and drive control unit
connector. No insulation between
sensor connector and other I/O
connectors. FAIO-01
No special requirement - - x Reinforced insulation between
sensor connector and other connect-
ors (including drive control unit con-
nector).
FPTC-
xx
1)
1) Suitable for use in safety functions (SIL2 / PL c rated).
￭ Connection of motor temperature sensor to the drive via a relay
PTC alternative A: This table shows the insulation requirement for a customer’s external
relay, and the insulation requirement for the sensor to fulfill decisive voltage class A (double
insulation) of IEC 60800-5-1. The table also shows the insulation of the factory-installed
76 Guidelines for planning the electrical installation