Siemens PANEL PC 877 Protection against dust and water, Principle, IP54 degree of protection

Application planning

4.4 Mounting Positions and Fastening

4.4.4Protection against dust and water

Principle

The degree of protection provided at the front is assured when the mounting seal lies completely against the mounting cut-out.

Caution

Please ensure that the material strength at the mounting cut-out is a maximum of 6 mm. Please follow the specifications for the dimensions in the "Mounting cut-out" section.

The degrees of protection are only guaranteed when the following is observed:

•The material strength at the mounting cut-out is at least 2 mm.

•The surface plane deviation of the mounting cut-out in relation to the external dimensions of the control unit amounts to ≤ 0.5 mm when the control unit is mounted.

IP65 degree of protection and NEMA4

IP65 degree of protection and compliance with the NEMA4 regulations are only ensured when clamp mounting together with a ring seal.

IP54 degree of protection

This degree of protection is achieved for screw fixing of all operator control units with a key front panel and the 15" and 19" operator control units with a touch front panel. This degree of protection is assured for the 19" operator control unit with a touch front panel when the mounting components for 19" rack accessories are used.

Note

For screw fixing of the 19" touch panel front, a backing plate is available as an accessory. For further information, see "http://mall.ad.siemens.com/".

4-8	SIMATIC Panel PC 877
	Operating instructions, Release 07/2006, A5E00877780-01