1.1.1 Using a PELV or SELV power supply
It’s recommanded to use a protected extra-low voltage supply (PELV) instead of a safety extra-low
voltage supply (SELV).
If a SELV is used, it’s possible that the isolation from the earth can be violated through our drive (e.g.
through heatsink or mechanical mountings) and the supply becomes PELV.
1.1.2 Warning about using contactors behind the power supply
Attention
Attention
Our servo drives are designed for voltages between 24 V and 48 V (60 V Max), they should be
Our servo drives are designed for voltages between 24 V and 48 V (60 V Max), they should be
run with an appropriate extra-low voltage supply. Please
run with an appropriate extra-low voltage supply. Please
do not use contactors behind the
do not use contactors behind the
power supply
power supply
since the transient-voltage-suppression diodes could get damaged due to the
since the transient-voltage-suppression diodes could get damaged due to the
power-up voltage increase (Surge). This is likely to happen when the power up occurs fast and
power-up voltage increase (Surge). This is likely to happen when the power up occurs fast and
can lead to complete failure
can lead to complete failure
of your servo drive.
of your servo drive.
If contactors behind the power supply are used, it’s necessary to
If contactors behind the power supply are used, it’s necessary to
include an uni-directional
include an uni-directional
TVS diode type 1.5KE62A-E3/54
TVS diode type 1.5KE62A-E3/54
* between Main Power Supply and Ground of the terminal.
* between Main Power Supply and Ground of the terminal.
* this model has been successfully tested by Synapticon. Other products with the same
* this model has been successfully tested by Synapticon. Other products with the same
specifications may also be appropriate but can’t be recommended.
specifications may also be appropriate but can’t be recommended.
In case you are running several servo drives behind a contactor, please use an uni-directional TVS
diode on each drive because of the inductances of the wiring.
Hardware Manuals / SOMANET Circulo / SOMANET Circulo (rev.
B.1) / Installation Guide / Wiring instructions / Power supply,
phases and brake
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