Rockwell Automation Publication 750-TG100B-EN-P - June 2019 19
Before You Begin Tests, Maintenance, or Repairs Chapter 1
6. For common bus inverters, by using the DC bus testpoints +DC and
–DC on the front of the power modules, measure the DC bus voltage of
all power modules and verify that there is no voltage present on the bus
capacitors. Measure +DC to –DC, +DC to chassis GND, and –DC to
chassis GND.
ATTENTION: To avoid an electric shock hazard, verify that the voltage on the
bus capacitors has discharged completely before servicing. Verify that there
is no DC bus voltage present using the +DC to –DC testpoints on all power
modules by measuring +DC to –DC, +DC to GND, and –DC to GND.
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