X12

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HMIs, human machine interfacesPanel PC ET/MT-4x6...Electrical InstallationConnection toX12

 

Up to 8 Ex-e terminal blocks may be mounted inside the connection box of the device. Because these terminal blocks are exclusively mounted during production, this option must be specified when ordering the product.

 

Symb_Caution1_30x30

The X12 terminal block cannot be used together with an optional hard disk !

Both use the same mounting space.

 

 

For devices with these optional terminal blocks, please note the following:

 

Warnhinweis

Ex-e or I.S. circuits MUST NOT be connected at the same time on terminal block X12.

 

Hinweis

When connecting cables please ensure that the cable insulation reaches right up to the terminal part.

 

 

Labelling Ex-i circuits

If intrinsically safe circuits are connected to terminal X12, the terminal and these circuits must be marked clearly and uniquely in line with EN 60079-11. If a colour is used, this must be light blue.

 

 

Connection details of the Ex-i terminals

Intrinsically safe circuits with the following safe maximum values may be connected to terminal block X12:

U = 30 V

I = 5 A

 

Connection details of the Ex-e terminals

For the alternatively permitted connection of Ex-e circuits the maximum values of the first supplement apply:

 

Maximum nominal voltage:

275 V

Maximum nominal voltage:

 

(if the fixed bridge bar is used):

175 V

Rated current:

4 A

Maximum on-load current:

5 A

 

Cable types and cross sections

 

flexible mm² (AWG)

0.2 – 1.5 (24 – 16)

rigid mm² (AWG)

0.2 – 1.5 (24 – 16)

 

Which cable cross sections are chosen should be decided on the basis of relevant regulations, such as DIN VDE 0298. Factors that might require a larger cross section, such as current, increased temperatures, cable bundling, etc. must also be taken into account. Factors that might require a larger cross section, such as current, increased temperatures, cable bundling, etc. must also be taken into account.

 

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