Rockwell Automation 20-750-ATEX PowerFlex 750-Series ATEX Option Module - Manual (Page 32)

32 Rockwell Automation Publication 750-UM003B-EN-P - July 2013
Chapter 3 Verify Operation
Functional Proof Testing
Without a Test Fixture Follow these steps to test the ATEX safety function without a test fixture.
1. Wire the ATEX daughter card to the thermal sensor in the motor.
2. Power-up the drive.
3. Verify that no faults exist.
4. Remove power from the drive and verify that the voltage on the bus
capacitors has discharged.
5. Unplug the ATEX terminal plug from the ATEX daughter board.
6. Power-up the drive.
If the ATEX safety function is operating correctly, an over temperature
fault is enunciated.
7. If a safety card is present, check parameter 933 [Start Inhibits] and verify
that bit 2 [Enabled] and bit 7 [Safety] are set to high.
8. Remove power from the drive and verify that the voltage on the bus
capacitors has discharged (see step 4 ).
9. Reinstall the ATEX terminal plug.
10. Power-up the drive and verify that the over temperature fault can now be
cleared.
If the SSM option is present additional steps are required. See Reset the
Drive after an SSM Fault Detection on page 27 .
ATTENTION: To avoid an electric shock hazard, verify that the voltage on the
bus capacitors has discharged completely before performing any service.
Frames 1…7: Measure the DC bus voltage at the power terminal block by
measuring between the +DC and -DC terminals or between the +DC and -DC test
points if equipped. Also measure between the +DC terminal or test point and the
chassis and between the -DC terminal or test point and the chassis. The voltage
must be zero for all three measurements.
Frames 8…10: Measure the DC bus voltage at the DC+ and DC- test point sockets
on the front of the power module.
See the PowerFlex 750-Series AC Drives Installation Instructions, publication
750-IN001 , for the location of the terminal block and test point sockets.