Rockwell Automation 20G PowerFlex SCR Bus Supply - Manual (Page 30)

1-16 Installation/Wiring
PowerFlex SCR Bus Supply User Manual
Publication 20S-UM001G-EN-P
1000A SCR Bus Supply
Flexibility The 1000A SCR Bus Supply can be converted in the following ways.
Because of numerous internal changes (components, cables, and hardware)
the following conversions are not allowed:
• Standalone to master
• Standalone to slave
• Slave to standalone
• Slave to master
NOTE: See Figure A.11 on page A-19 for circuit board location.
Converting Master Unit to Standalone Unit
No changes are required to run a master (without slave units) as a
standalone SCR Bus Supply.
Converting Master Unit to Slave Unit
It is possible to reconfigure a master SCR Bus Supply to run as a slave SCR
Bus Supply. To convert a master unit to a slave, perform these steps.
1. Remove the cables between the precharge board connectors (X2 and
X3) and the gate driver printed circuit board connector X4 (see
Figure P.3 on page P-7 ).
2. Connect a cable from the gate driver printed circuit board connector
(X4) to the new master SCR Bus Supply or another slave SCR Bus
Supply gate connector (X6, see
Figure P.4 on page P-8 ). Note that the
precharge board does not need to be removed from the converted SCR
Bus Supply.
3. Ensure that the precharge relay is not energized (terminal
block…terminal 1 and 2, see page 1-11 ).
4. Place a label near the data nameplate stating that the SCR bus supply
has been converted to catalog # 20Sx1K0NES, where x is the voltage
class of the unit.
1000A SCR Bus Supply
Convert to…
Standalone Master Slave
Convert from: Standalone No No
Master Yes Yes
Slave No No