Siemens Automation System S7-400 Manual do Utilizador descarregar pdf (Página 157)

Maintenance

7-9

Automation System S7-400 Hardware and Installation

A5E00850741-01

7.5 Changing the Fuses in the Digital Modules

Modules with Fuses

The following modules have fuses which you can change yourself if they are

defective:

• Digital output module SM 422; DO 16 x DC 20--125 V/1,5A

(6ES7422-5EH10-0AB0)

• Digital output module SM 422; DO 16 x AC 20-120 V/2A

(6ES7422-5EH00-0AB0)

• Digital output module SM 422;DO 8 x AC 120/230 V/5A

(6ES7422-1FF00-0AA0)

• Digital output module SM 422;DO 16 x AC 120/230 V/2A

(6ES7422-1FH00-0AA0)

Check the Plant

Correct the faults which led to the fuses blowing.

Changing the Fuses

To change the fuses in a digital module, you must remove the front connector from

the digital module and remove the module from the rack.

Warning

Improper handling of the digital modules can result in injury and damage.

Hazardous voltages of >25 VAC or >60 VDC may be present below the covers on

the right-hand side of the module.

Before you open these c overs, ensure that either the front connector for the

module is removed or the module is disconnected from the voltage supply.

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Siemens Automation System S7-400 Manual do Utilizador Página 157