Rockwell Automation SA3100 AC Power Modules - Manual (Page 44)

3-26 SA3100 Power Modules
3.16.1 Checking the Installation with Power Off
Pre-power checks are meant to identify any problems prior to applying voltage to the
system. The Power Module should be checked for any damage that may have
occurred during installation. Verify that all jumpers are correctly installed and that all
controls are properly set. Check that all wiring external to the Power Module is
accurately connected and in proper condition. Use the following checklist:
1. Verify that all external I/O wires are properly terminated. A full point-to-point
continuity check should be performed on all I/O wiring connected to the Power
Module.
2. Verify that the power source is properly sized and protected for your particular
Power Module. Verify proper AC or DC supply voltages and DC bus polarity.
3. Verify that the incoming power connections are accurately connected and in
proper condition.
4. Verify that the motor power connections are accurately connected and in proper
condition. Check motor phasing. Motor phase A should be connected to Power
Module output phase A, phase B to phase B, and phase C to phase C. All phases
must be properly terminated. Phasing will be double checked later in this
procedure.
5. Verify that the resolver feedback device is properly connected. See instruction
manual S-3057.
3.16.2 Checking the Installation with Power On
After all pre-power checks have been completed, the incoming AC line or DC bus
power may be applied. All personnel must have a thorough knowledge of the safety
controls associated with the system. All persons should have a thorough
understanding of the SA3100 Power Module and the associated system design before
power is applied.
3.16.2.1Checking the AC Supply
Measure the incoming line voltage between L1 and L2, L2 and L3, and L1 and L3. Set
the DMM on AC Volts, highest range (1000 VAC). The input voltage should match the
input voltage given on the Power Module’s nameplate within +/-10%. If the voltage is
out of tolerance, verify that the Power Module rating is correct for the application. If the
Power Module is correctly rated, the incoming line voltage must be adjusted to within
+/-10%.
!
ATTENTION:DC bus capacitors retain hazardous voltages after input
power has been disconnected. After disconnecting input power, wait five
(5) minutes for the DC bus capacitors to discharge. Then check the
voltage across the DC bus to ensure the bus capacitors are discharged
before touching any internal components. Failure to observe this
precaution could result in severe bodily injury or loss of life.
!
ATTENTION: Working with energized industrial control equipment can
present hazards of electrical shock, burn, or unintended actuation of
controlled equipment. The Safety Related Practices of NFPA 70,
Electrical Safety for Employee Workplaces, must be observed at all
times. Do not work alone on energized equipment.