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GD1 – Installation Guide
5.3 – ENERGY RECUPERATION VIA A BRAKING RESISTOR
All GD1 drives are equipped with the power feedback system. When the motor is decelerating with high inertia
and high speed, the mechanical braking energy is reflected to the drive. This energy is dissipated inside a resistor
called "braking resistor".
Two configurations of the braking resistor are available: integrated or external
The external braking resistor must MANDATORILY be mounted out of range of heat sensitive and inflammable
elements (plastic, cable sleeves, etc.).
For an optimum power feedback by the drives in a multiaxis application, it is possible and recommended to
connect the DC bus (DC+ and DC-) in parallel (see diagram in section 4.2).
It is recommended to mount the braking resistor on the axis with highest current rating.
An electronic control of the reflected power avoids the overload of the braking resistor. So, if the energy reflected
to the drives with parallel mounted DC busses is too high, the DC bus voltage will rise up to the triggering of the
"Overvoltage" fault. A second resistor must then be mounted on the second axis which shall then be equipped
with "Power supply inside" unit.
5.4 – MAINTENANCE
The GD1 drive does not require any special maintenance in a specified environment.
The opening of the housing will cancel the warranty.
In an environment containing a dust type such as i.e. cloth fibres, it may be necessary to preventively clean the
heatsink.
WARNING !
Do not use an air gun outside the heatsink. Blowing inside the drive is prohibited (risk
of moistured air on the electronic cards).
5.5 – ORDER CODE
Voltage: 230 or 400 Vac
Peak current
Power supply inside (00: without)
Additional braking resist. integrated (0: without)
Safety integrated: S1 = Safe Torque Off
Extensions Ex1, Ex2, Ex3:
Each extension position can receive an extension board.
Can be selected: One bus interface:
PR = Profibus DP, I1 = additional input/output,
EO = Encoder Output
ET = Ethercat
00 = without
00 = reserved
Serial link RS-422 integrated (00 = standard = RS232)
38
GD1 – uuu / cc – PS – R – SI – Ex1 – Ex2 – Ex3 – 00 - RS
(see Chapter
2).
Part 1 – Chapter 5 – Appendix
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