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4-6

Installing 575 System Hardware SIMATIC 545/555/575 System Manual

4.5 Installing the Fan Assembly

You can operate the PPX:575–2130 base with the fan assembly at standard

rated power of each I/O module and the power supply at any ambient

temperature up to 60°C. Refer to Appendix E for I/O module derating charts

with and without forced air flow.

Table 4-1 lists the requirements that apply when you set up your system

without the fan assembly.

Table 4-1 Derating Requirements for Operation without Fan Assembly

Module

Derating @ 40°C w/o Fans

PPX:575–6660 185-watt power supply

60 watts maximum power load

PPX:575–6663 300-watt power supply 100 watts maximum power load

575 I/O modules Refer to Appendix E for I/O module

derating charts without forced air

flow.

Other vendor’s VME modules Refer to vendor’s specifications for

operating requirements without

forced air flow.

For use without fans, power supply PPX:575–6660 must have manufacturer date

after 2/94. You can verify this by ensuring that the Prodok revision label is

marked with numeral 3 or higher, as shown here:

12345

678910

To install the fan assembly, you must perform three tasks: select the correct

voltage, connect power to the AC terminals, and mount the assembly.

Because the voltage selector switch and AC terminals are located at the rear

of the unit (see Figure 4-1), you should set the voltage selection and connect

power before mounting the fan assembly.

Operating With

Fan Assembly

Operating Without

Fan Assembly

Installation

Sequence

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