Installation manual
System Description 08/04 Danaher Motion Kollmorgen
82 M-SS-001-01 Rev. T SERVOSTAR S Installation
8.2 BUS Module
The SERVOSTAR family includes a variety of BUS Modules that
convert a single-phase logic voltage and a three-phase AC line into
the drive’s DC logic power and main DC BUS.
8.2.1 FEATURES
− Converts single or three-phase AC main lines into a rectified
DC BUS (check BUS Module Electrical Specifications table to
verify specific BUS Module operation). The input consists of a
3φ diode bridge 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 minimize the effect of in-
rush current spikes inherent in a power-up cycle. This feature
eliminates the need for a costly isolation transformer.
− The logic BUS Module on all units consists of a SMPS to
develop the required ±15 V and +8 V from either the main line
(use L
A
and L
B
) or a separate AC logic input. Most BUS
Modules can source up to four standard drives (SRxx200 or
SExx200). See AppNote ASU000H on the PSP CD-ROM for
details on logic sourcing.
− Product features are:
Indicator PA08 PA14/28 PA50/75/85
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 opens 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
− The PA-LM unit is a logic supply only and should be used in
multi-axis applications where the number of drives exceeds the
logic capabilities of the BUS Module. This unit comes with
three green LED’s that verify the presence of the +15 V, -15 V,
and 8 V sources.
See the Bus Module Electrical Specifications for details on
these features.