Siemens SCALANCE X-400 Compact Operating Instructions page 9

Simatic net, industrial ethernet switches, extender modules

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Information on use in hazardous areas according to ATEX

Requirements for the cabinet/enclosure

To comply with EU Directive 94/9 (ATEX95), this enclosure must meet the requirements of

at least IP54 in compliance with EN 60529.

The fiber-optic bus connections labeled SCALANCE MM400 (see type plate) may also be

led through a hazardous area zone1 (see also Auto-Hotspot, section "Explosion Protection

Directive (ATEX)").

Suitable cables for temperatures in excess of 70 °C

If the cable or conduit entry point exceeds 70 °C or the branching point of conductors

exceeds 80 °C, special precautions must be taken. If the equipment is operated in an air

ambient in excess of 50 °C, only use cables with admitted maximum operating temperature

of at least 80 °C.

Protection against transient voltage surges

Provisions shall be made to prevent the rated voltage from being exceeded by transient

voltage surges of more than 40%. This criterion is fulfilled, if supplies are derived from

SELV (Safety Extra-Low Voltage) only.

Information on use in hazardous areas according to UL-HazLoc

EXPLOSION HAZARD

DO NOT DISCONNECT WHILE CIRCUIT IS LIVE UNLESS AREA IS KNOWN TO BE

NON-HAZARDOUS.

This equipment is suitable for use in Class I, Division 2, Groups A, B, C and D or non-

hazardous locations only.

This equipment is suitable for use in Class I, Zone 2, Group IIC or non-hazardous locations

only.

SCALANCE X-400 extender modules

Compact Operating Instructions, 04/2013, A5E00367421-10

WARNING

Safety instructions

2.1 Important notes on using the device

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