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

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Motor temperature measurement through the standard I/O

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