Rockwell Automation 2090-UCSR-P900 900 Watt Passive Shunt Module Installation - Manual

1 Publication 2090-IN001A-EN-P — March 2001
Installation Instructions
900 Watt Passive Shunt Module
Ultra Series drives and controllers can require external power
dissipation when large inertial loads are present. To ensure that drive
faults due to excessive bus voltage do not occur, loads requiring
power dissipation that exceed a drive’s internal shunt capability
require the use of external shunt resistor(s).
The passive shunt (Catalog No. 1398-SR9PF or 2090-UCSR-P900) can
be used with the following products:
As a motor decelerates, power is returned from the motor to the drive
module, causing the bus voltage on the drive to increase. Ultra servo
amplifier products have circuitry that senses the voltage on the drive’s
DC bus and dissipates power when needed. When the bus voltage
reaches the shunt turn-on voltage of the drive, the internal shunt
circuitry allows the excessive regenerated power to be dissipated
through an external resistor. After the bus voltage is reduced to the
turn-off voltage level, the shunt transistor turns-off and no additional
power is dissipated by the shunt resistor.
Drive Catalog No.
ULTRA 200 Drives 1398-DDM-075, -075X, -150, and -150X
ULTRA Plus Drives 1398-PDM-075 and 1398-PDM-150B
Ultra3000 Drives 2098-DSD-075, -075-SE, -075-DN, -075X, -075X-DN, -150,
-150-SE, -150-DN, -150X, and -150X-DN
Ultra5000 Drives 2098-IPD-075, -075-DN, -150, and -150-DN
ATTENTION
!
Using the passive shunt with modules not listed can
cause equipment damage or personal injury.