Motor Temperature Measurement Through The Analog I/O Extension - ABB ACS800 Series Firmware Manual

46

Motor temperature measurement through the analog I/O extension

The figure below shows the temperature measurement options of one motor when
an optional Analog I/O Extension Module is used.
One sensor
Three sensors
WARNING! According to IEC 664, the connection of the motor temperature sensor
to the Analog I/O Extension Module, NAIO or RAIO, requires double or reinforced
insulation between motor live parts and the sensor. Reinforced insulation entails a
clearance and creeping distance of 0.315" (8 mm) (400 / 500 VAC equipment). If the
assembly does not fulfil the requirement:
• The option module terminals must be protected against contact and they may not
be connected to other equipment.
Or
• The temperature sensor must be isolated from the NAIO/RAIO module terminals.
See also the section
Program features
Motor
T
10 nF
(>630 VAC)
Motor
T T
T
10 nF
(>630 VAC)
Motor Thermal Protection
RAIO or
NAIO module
AI1+
AI1-
AO1+
AO1-
SHLD
RAIO or
NAIO module
AI1+
AI1-
AO1+
AO1-
SHLD
on page 38.
The minimum voltage
of the capacitor
must be 630 VAC