ElmoMC SimplIQ Analog Servo Amplifiers-Violin Operating Manual - Manual (Page 26)

Elmo Motion Control Rev 09/09 VIO-Velocity - Operating Manual
Page 22
Guidelines for connecting a non isolated amplifier with an isolating power transformer
Ground:
DC power common
Motor chassis
Amplifier's heat sink
4.3
DC power supply
DC power supply can be at any voltage in the range defined within the technical specifications. The supply
source must comply with the safety aspects of the relevant requirements in accordance with the most recent
version of the standard EN60950 or equivalent Low Voltage Directive Standard, all according to the
applicable over voltage Category. If the power source to the power supply is the AC line (through a
transformer), safety margins have to be considered to avoid activating the under/over voltage protection due
to line variations and/or voltage drop under load.
In addition to the above, the transformer must comply with the safety aspects of the relevant requirements
in accordance with the most recent version of the standard EN60742 (Isolating and Safety Isolating
Transformers). The nominal DC bus voltage should be in the following range:
1.2VDCmin < VDC < 0.9VDCmax
VDCmin - Minimum DC bus
VDCmax - Maximum DC bus
Recommended minimum power supply capacitance for single phase connection:
Type of amplifier VIO-
25/50V
VIO-
15/55V
VIO-
10/100V
VIO-
15/100V
VIO-
6/200V
VIO-
15/200V
Recommended
capacitance 5600µF 5600µF 3300µF 5600µF 1500µF 5600µF
Table 9: Recomended Capacitance
The transformer power should be calculated to have the capability to deliver power to the amplifier
(including peak power), without significant voltage drops.
The power supply should be located as close as possible to the amplifier. Maximum distance is 30cm (1
foot).
While driving high inertia loads, the power supply must be equipped with a shunt regulator, otherwise, the
amplifier will be disabled whenever the capacitors are charged above the maximum voltage.