Planning the electrical installation 57
Connection of a motor temperature sensor to the drive
I/O
WARNING! IEC 61800-5-1 requires double or reinforced insulation between
live parts when:
• the accessible parts are non-conductive, or
•the accessible parts are conductive, but not connected to the protective
earth.
Obey this requirement when you plan the connection of a motor temperature sensor
to the drive.
You have these implementation 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 analog/digital inputs of
the drive. Make sure that the voltage is not more than the maximum allowed
voltage over the sensor.
2. If there is basic insulation between the sensor and the live parts of the motor, or
if the insulation type is not known: You can connect the sensor to the drive
through an option module. The sensor and the module must form a double or
reinforced insulation between the motor live parts and the drive control unit.
Make sure that the voltage does not exceed the maximum allowed voltage over
the sensor.
3. If there is basic insulation between the sensor and the live parts of the motor, or
if the insulation type is not known: You can connect a sensor to a digital input of
the drive via an external relay. The sensor and the relay must form a double or
reinforced insulation between the live parts of the motor and the digital input of
the drive. Make sure that the voltage does not exceed the maximum allowed
voltage over the sensor.
Installation sites above 2000 metres (6562 feet)
WARNING! Protect against direct contact when installing, operating and
servicing the RMIO board wiring and option modules attached to the board.
The Protective Extra Low Voltage (PELV) requirements stated in EN 50178
are not fulfilled at altitudes above 2000 m (6562 ft).
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