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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 m (6562 ft)
WARNING! Protect against direct contact when installing, operating and
servicing the RMIO board wiring and optional modules attached to the
board. The Protective Extra Low Voltage (PELV) requirements stated in
EN 50178 and IEC 61800-5-1 are not fulfilled at altitudes above 2000 m
(6562 ft).
Routing the cables
Route the motor cable away from other cable routes. Motor cables of several drives
can be run in parallel installed next to each other. It is recommended that the motor
cable, input power cable and control cables be installed on separate trays. Avoid long
parallel runs of motor cables with other cables in order to decrease electromagnetic
interference caused by the rapid changes in the drive output voltage.
Where control cables must cross power cables make sure they are arranged at an
angle as near to 90 degrees as possible. Do not run extra cables through the drive.
Planning the electrical installation 67
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