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4-9

SIMATIC 545/555/575 System Manual

Installing 575 System Hardware

The fan assembly is fused to protect the hardware from over-voltage or

other adverse power conditions. If you need to replace the fuse, use a 3 A, 3

AG, 1

-in. x

-in., 250 V, slow-blow fuse (PPX:2587679–8002). The fuse

holder is located on the front panel of the fan assembly. To replace a fuse,

follow these steps.

CAUTION

To minimize risk of shock hazard, always turn off all power from the fan

assembly before changing the fuse.

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 changing the fuse.

1. Disconnect power to the fan assembly.

2. Insert a flat-bladed screwdriver in the fuse-holder slot and rotate

counterclockwise (about

turn) until it pops out (see Figure 4-3).

3. Remove the fuse, and insert a new fuse in the fuse holder.

4. Insert the fuse holder into the slot, push firmly against the spring, and

rotate clockwise until it locks in place.

5. Reconnect power to the fan assembly.

Fuse holder

Front Panel of

Fan Assembly

Turn counterclockwise

to remove.

Figure 4-3 Replacing Fuse on Optional Fan Assembly

Replacing Fuse on

the Fan Assembly

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Siemens SIMATIC TI500 Spezifikationen Seite 92