Danaher Motion
Power Supplies
SERVOSTAR
®
SBD-Series ST/CT Product Family
9
Power Supplies
The SERVO
STAR
family includes a variety of BUS modules that convert a single-phase logic voltage
and a single or three-phase AC line into the drive’s DC logic power and main DC BUS.
Brush motor design makes them more sensitive to high voltage conditions than brushless motors. The PS
power supply family offers a number of voltage ratings designed to shunt-regulate regenerated power to
maintain safe operating voltage levels. Operating these power supplies with higher-than-designed input
voltages can cause regen circuit failure.
FEATURES
•
Converts single or three-phase AC main lines (or transformer outputs) into a rectified DC BUS
(check BUS module Electrical Specifications table to verify specific BUS module operation). The
input consists of a 3
φ
diode bridge, soft-start circuitry, and BUS capacitors. These capacitors help
to minimize BUS ripple, and therefore BUS drooping, during the peak power demands of the
load.
•
All units have soft-start capability to gradually develop the DC BUS allowing direct line
connection to minimizes the effect of “in-rush” current spikes inherent in a power-up cycle.
•
An external Shunt Regulator option to dissipate regenerative energy while maintaining a safe
operating voltage for the motor.
•
The logic BUS module on all units consists of a switching power supply to develop the required
±
15V and +8V from either the main line (use L
A
and L
B
) or a separate AC logic input.
•
Product features are:
Indicator PS10
PS20/40
PS50/75/85
1
Green LED
X
X
X
2
Yellow LED
n/a
X
X
3
Red LED
n/a
n/a
X
4
Fault Relay
n/a
X
X
5
SoftStart X X X
6
Regeneration n/a
I/E
E
1
Indicates when voltage is on the caps.
2
Indicates unit is operating in regen and may flash during aggressive accelerations.
3
Indicates unit is still in SoftStart. This LED is also used to indicate when an
OverVoltage fault has occurred from too much power being pumped back into the
system during regen.
4
The relay is a normally-open contact and closes after the unit is powered-up and out of
SoftStart. The contact will open if there is an improper BUS module voltage (dropping in
and out of SoftStart), an over-heated internal regen resistor, or the main heatsink
becomes too hot.
5
Contains SoftStart capability
6
E-external, I-internal
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