Rockwell Automation 20D-P2-ENCO PowerFlex 700S Drive Phase II Control Second Encoder Option Card - Manual (Page 3)

Second Encoder Option Card for PowerFlex® 700S Drives with Phase II Control 3
Step 1: Removing Power
from the Drive
!
ATTENTION: To avoid an electric shock hazard, verify that the
voltage on the bus capacitors has discharged before performing
any work on the drive. Measure the DC bus voltage at the +DC &
–DC terminals of the Power Terminal Block. The voltage must
be zero.
Remove power before making or breaking cable connections.
When you remove or insert a cable connector with power
applied, an electrical arc may occur. An electrical arc can cause
personal injury or property damage by:
• sending an erroneous signal to your system’s field devices,
causing unintended machine motion
• causing an explosion in a hazardous environment
Electrical arcing causes excessive wear to contacts on both the
module and its mating connector. Worn contacts may create
electrical resistance.
Task Description
Turn off and lock out input power. Wait five minutes.
Verify that there is no voltage at the drive’s input power terminals.
Measure the DC bus voltage at the +DC & -DC terminals on the
Power Terminal Block. The voltage must be zero.
A
B
C C
L1 L2 L3
O
I