20 Connections CG Drives & Automation 01-5980-01r2
3.2 Board layout and connectors
This section contains general information about the power
board and control board for each Emotron TSA size. For
additional information about special conditions refer to
section 4.4, page 36. For a description of the available
options, go to chapter 12. page 155.
Isolation
The control board in the Emotron TSA product is a
Separated Extra Low Voltage (SELV) circuit. This means
that this board is safely separated from other circuits that
carry higher voltages and is isolated from earth and
protective earth conductors of other circuits. The PTC
circuit on the power board is separated from the control
board SELV circuit with a separation rated for:
• Double insulation when used in softstarters rated up to
525 VAC.
• Basic insulation when used in softstarters rated up to
690 VAC.
It is recommended that the PTC/PT100 sensors are always
separated from live parts with at least basic insulation for the
relevant voltage.
WARNING!
For softstarters rated higher than 525 VAC, it
is mandatory to have at least basic insulation
from the temperature sensor towards live
voltage.
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