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Motor temperature measurement through an analogue I/O extension This section describes the motor temperature measurement of one motor when an optional analogue I/O extension module RAIO is used as the connection interface. RAIO module
One sensor Motor
AI1+ AI1-
T AO1+ 10 nF (> 630 VAC)
AO1-
SHLD
Three sensors
RAIO module
AI1+ Motor T
T
The minimum voltage of the capacitor must be 630 VAC.
AI1T
10 nF (> 630 VAC)
AO1+ AO1-
SHLD
WARNING! According to IEC 664, the connection of the motor temperature sensor to the RAIO module, requires double or reinforced insulation between motor live parts and the sensor. Reinforced insulation entails a clearance and creepage distance of 8 mm (400 / 500 VAC equipment). If the assembly does not fulfil the requirement: • The RAIO 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 RAIO module terminals. See also section Motor Thermal Protection on page 62.
Program features