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Troubleshooting

9-19

SIMATIC 545/555/575 System Manual

9.7 Troubleshooting Power Supplies

Complete the following steps when troubleshooting a power supply.

1. Ensure that the power budget has not been exceeded and that the

power supply module is properly installed.

2. Disable all power to the system for at least 90 seconds.

3. Restore system power.

4. If the problem still exists, turn off power to the system again and follow

the steps below.

WARNING

To minimize risk of shock hazard, always turn off power to the base before

removing or installing a power supply module.

Failure to do so could cause death or serious injury and/or damage to

equipment.

Ensure that power to the base is turned off before removing or installing a

power supply module.

5. To verify that voltage selection is correct, remove the power supply

module from the base. (This step is not required for the PPX:505–6663

or PPX:575–6660 power supplies.)

a. Ensure that the power supply module is set to the correct line

voltage.

b. If the voltage has been set incorrectly, wait at least one minute

before touching the jumper. Then move the jumper to the

appropriate quick-connect pin.

6. If you removed the power supply module to check the voltage selection,

re-install the power supply now.

7. Ensure that the wires attached to the terminal screws on the bezel are

secure and that the user-supplied power source is functional.

8. Verify that the fuse (located on the bezel) has not opened. Follow

steps 9. through 12. to replace the fuse, if necessary, with the

appropriate fuse. See Figure 9-2.

WARNING

To minimize the risk of shock hazard, always turn off power to the base before

you replace a fuse.

Failure to do so could cause death or serious injury to personnel, and/or

damage to equipment.

Ensure that power to the base is disabled before replacing a fuse.

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Siemens SIMATIC TI500 Especificaciones Pagina 239