230 V AC
230 V AC
+ 24 V DC
1
2
3
4
Relay output1
Varistor2
RC filter3
Diode4
Limiting relay output maximum voltages at high installation
altitudes
See Isolation areas (page 230) for frames R1…R5 and Isolation areas (page 234) for
frames R6…R9.
Implementing a motor temperature sensor connection
WARNING!
IEC 61800-5-1 requires double or reinforced insulation between live parts
and accessible parts when:
• the accessible parts are not conductive, or
• the accessible parts are conductive, but not connected to the protective
earth.
Obey this requirement when you plan the connection of the 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 input(s)
of the drive. See the control cable connection instructions. Make sure that the
voltage is not more than the maximum allowed voltage over the sensor.
Guidelines for planning the electrical installation 125
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