Programming instructions

43
Installation
5. Plug the external power cable from the AC commercial power supply
into the power input plug on the power distribution unit (PDU).
6. Disconnect the protective earth wire from the protective earth ground
stud on the rear of the cabinet.
7. Using a digital multimeter, measure the AC potential between the
protective earth wire (building ground) and the protective earth ground
stud. A voltage reading of less than 1 Vac is acceptable. To prevent
damage to the multimeter, set it to the maximum ac scale, then reduce
the setting gradually to the 10 Vac range.
8. If the potential is greater than 1 Vac, recheck the ground connections
and repeat the measure.
9. If the reading still exceeds 1 Vac, the building ground is unacceptable.
Connect the protective earth wire to a new building ground and repeat
the steps 7 through 9 until you have an acceptable AC potential.
10. Reconnect the protective earth wire to the protective earth ground stud
and attach the anti-static wrist strap to your wrist.
11. Slide the installed circuit cards back into contact with the cabinet
backplane. Ensure that each card is fully inserted in its slot.
12. Remove the anti-static strap from your wrist.
Installing the Power Converter
Refer to “Safety Considerations” on page 98.
1. At the rear of the cabinet, remove the two screws that fasten the
internal AC power cord access cover plate to the backplane, and
remove the cover plate (see Figure 8).
WARNING: DO NOT CONTINUE UNTIL YOU HAVE A
POTENTIAL OF 1 VAC OR LESS BETWEEN THE BUILDING
GROUND AND THE PROTECTIVE EARTH GROUND STUD.
OTHERWISE, PERSONAL INJURY AND/OR EQUIPMENT
DAMAGE MAY RESULT.
WARNING: DANGER TO PERSONNEL AND/OR
EQUIPMENT DAMAGE COULD RESULT IF THE CABINET IS
NOT POWERED OFF DURING INSTALLATION OF THE AC
POWER CONVERTER.