Operating instructions

Application planning

4.4 Mounting positions and fastening

SIMATIC Panel PC 677B

Operating Instructions, 05/2007, A5E01035609-01

4.4.4 Protection against dust and water

Principle

With the relevant installation, the device is protected on the front agains the ingress of dust

and water. The "degree of protection" is in accordance with IEC 60529: On the front, the

device has degree of protection IP65, the rear of the operator section and the computer unit

have degree of protection IP20.

Caution

Ensure that the material strength at the mounting cut-out is a minimum of 2 mm and a

maximum of 6 mm. Please follow the specifications for the dimensions in the "Mounting cut-

out" section.

The degrees of protection IP65, IP54 and NEMA 4, are only guaranteed when the following

conditions are met:

• 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.

Degree of protection IP65 and NEMA 4

IP65 degree of protection and compliance with the NEMA 4 regulations are only ensured

when clamp mounting together with a ring seal.

IP54 degree of protection

The IP54 degree of protection is applicable for the following conditions:

Key panel Touch panel

12" 15" 15" 17" 19"

Screw mounting X X X - -

Screw mounting with backing

plate

- - - X X

Note

A backing plate is available as an accessory for screw mounting the 17" and 19" touch

panel. You can find additional information under:

http://www.siemens.com/automation/mall